diff --git a/examples/ArduinoLoRa/LoRaReceiver/LoRaBoards.cpp b/examples/ArduinoLoRa/LoRaReceiver/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/ArduinoLoRa/LoRaReceiver/LoRaBoards.cpp
+++ b/examples/ArduinoLoRa/LoRaReceiver/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/ArduinoLoRa/LoRaSender/LoRaBoards.cpp b/examples/ArduinoLoRa/LoRaSender/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/ArduinoLoRa/LoRaSender/LoRaBoards.cpp
+++ b/examples/ArduinoLoRa/LoRaSender/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/BPFFactory/LoRaBoards.cpp b/examples/BPFFactory/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/BPFFactory/LoRaBoards.cpp
+++ b/examples/BPFFactory/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Display/Free_Font_Demo/LoRaBoards.cpp b/examples/Display/Free_Font_Demo/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Display/Free_Font_Demo/LoRaBoards.cpp
+++ b/examples/Display/Free_Font_Demo/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Display/TBeam_TFT_Shield/LoRaBoards.cpp b/examples/Display/TBeam_TFT_Shield/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Display/TBeam_TFT_Shield/LoRaBoards.cpp
+++ b/examples/Display/TBeam_TFT_Shield/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Display/TFT_Char_times/LoRaBoards.cpp b/examples/Display/TFT_Char_times/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Display/TFT_Char_times/LoRaBoards.cpp
+++ b/examples/Display/TFT_Char_times/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Display/UTFT_demo/LoRaBoards.cpp b/examples/Display/UTFT_demo/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Display/UTFT_demo/LoRaBoards.cpp
+++ b/examples/Display/UTFT_demo/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Factory/LoRaBoards.cpp b/examples/Factory/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Factory/LoRaBoards.cpp
+++ b/examples/Factory/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/GPS/TinyGPS_Example/LoRaBoards.cpp b/examples/GPS/TinyGPS_Example/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/GPS/TinyGPS_Example/LoRaBoards.cpp
+++ b/examples/GPS/TinyGPS_Example/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/GPS/TinyGPS_FullExample/LoRaBoards.cpp b/examples/GPS/TinyGPS_FullExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/GPS/TinyGPS_FullExample/LoRaBoards.cpp
+++ b/examples/GPS/TinyGPS_FullExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/GPS/TinyGPS_KitchenSink/LoRaBoards.cpp b/examples/GPS/TinyGPS_KitchenSink/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/GPS/TinyGPS_KitchenSink/LoRaBoards.cpp
+++ b/examples/GPS/TinyGPS_KitchenSink/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/GPS/UBlox_BasicNMEARead/LoRaBoards.cpp b/examples/GPS/UBlox_BasicNMEARead/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/GPS/UBlox_BasicNMEARead/LoRaBoards.cpp
+++ b/examples/GPS/UBlox_BasicNMEARead/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/GPS/UBlox_NMEAParsing/LoRaBoards.cpp b/examples/GPS/UBlox_NMEAParsing/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/GPS/UBlox_NMEAParsing/LoRaBoards.cpp
+++ b/examples/GPS/UBlox_NMEAParsing/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/GPS/UBlox_OutputRate/LoRaBoards.cpp b/examples/GPS/UBlox_OutputRate/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/GPS/UBlox_OutputRate/LoRaBoards.cpp
+++ b/examples/GPS/UBlox_OutputRate/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/GPS/UBlox_Recovery/LoRaBoards.cpp b/examples/GPS/UBlox_Recovery/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/GPS/UBlox_Recovery/LoRaBoards.cpp
+++ b/examples/GPS/UBlox_Recovery/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/LoRaWAN/LMIC_Library_OTTA/LoRaBoards.cpp b/examples/LoRaWAN/LMIC_Library_OTTA/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/LoRaWAN/LMIC_Library_OTTA/LoRaBoards.cpp
+++ b/examples/LoRaWAN/LMIC_Library_OTTA/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/LoRaWAN/LoRaWAN_ABP/LoRaBoards.cpp b/examples/LoRaWAN/LoRaWAN_ABP/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/LoRaWAN/LoRaWAN_ABP/LoRaBoards.cpp
+++ b/examples/LoRaWAN/LoRaWAN_ABP/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/LoRaWAN/RadioLib_OTAA/LoRaBoards.cpp b/examples/LoRaWAN/RadioLib_OTAA/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/LoRaWAN/RadioLib_OTAA/LoRaBoards.cpp
+++ b/examples/LoRaWAN/RadioLib_OTAA/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/OLED/SH1106FontUsage/LoRaBoards.cpp b/examples/OLED/SH1106FontUsage/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/OLED/SH1106FontUsage/LoRaBoards.cpp
+++ b/examples/OLED/SH1106FontUsage/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/OLED/SH1106GraphicsTest/LoRaBoards.cpp b/examples/OLED/SH1106GraphicsTest/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/OLED/SH1106GraphicsTest/LoRaBoards.cpp
+++ b/examples/OLED/SH1106GraphicsTest/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/OLED/SH1106IconMenu/LoRaBoards.cpp b/examples/OLED/SH1106IconMenu/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/OLED/SH1106IconMenu/LoRaBoards.cpp
+++ b/examples/OLED/SH1106IconMenu/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/OLED/SH1106PrintUTF8/LoRaBoards.cpp b/examples/OLED/SH1106PrintUTF8/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/OLED/SH1106PrintUTF8/LoRaBoards.cpp
+++ b/examples/OLED/SH1106PrintUTF8/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/OLED/SSD1306SimpleDemo/LoRaBoards.cpp b/examples/OLED/SSD1306SimpleDemo/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/OLED/SSD1306SimpleDemo/LoRaBoards.cpp
+++ b/examples/OLED/SSD1306SimpleDemo/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/OLED/SSD1306UiDemo/LoRaBoards.cpp b/examples/OLED/SSD1306UiDemo/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/OLED/SSD1306UiDemo/LoRaBoards.cpp
+++ b/examples/OLED/SSD1306UiDemo/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/PMU/LoRaBoards.cpp b/examples/PMU/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/PMU/LoRaBoards.cpp
+++ b/examples/PMU/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/RadioLibExamples/Receive_Interrupt/LoRaBoards.cpp b/examples/RadioLibExamples/Receive_Interrupt/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/RadioLibExamples/Receive_Interrupt/LoRaBoards.cpp
+++ b/examples/RadioLibExamples/Receive_Interrupt/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/RadioLibExamples/Transmit_Interrupt/LoRaBoards.cpp b/examples/RadioLibExamples/Transmit_Interrupt/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/RadioLibExamples/Transmit_Interrupt/LoRaBoards.cpp
+++ b/examples/RadioLibExamples/Transmit_Interrupt/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/BME280_AdvancedsettingsExample/LoRaBoards.cpp b/examples/Sensor/BME280_AdvancedsettingsExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/BME280_AdvancedsettingsExample/LoRaBoards.cpp
+++ b/examples/Sensor/BME280_AdvancedsettingsExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/BME280_TestExample/LoRaBoards.cpp b/examples/Sensor/BME280_TestExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/BME280_TestExample/LoRaBoards.cpp
+++ b/examples/Sensor/BME280_TestExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/BME280_UnifiedExample/LoRaBoards.cpp b/examples/Sensor/BME280_UnifiedExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/BME280_UnifiedExample/LoRaBoards.cpp
+++ b/examples/Sensor/BME280_UnifiedExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/PCF8563_AlarmByUnits/LoRaBoards.cpp b/examples/Sensor/PCF8563_AlarmByUnits/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/PCF8563_AlarmByUnits/LoRaBoards.cpp
+++ b/examples/Sensor/PCF8563_AlarmByUnits/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/PCF8563_SimpleTime/LoRaBoards.cpp b/examples/Sensor/PCF8563_SimpleTime/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/PCF8563_SimpleTime/LoRaBoards.cpp
+++ b/examples/Sensor/PCF8563_SimpleTime/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/PCF8563_TimeLib/LoRaBoards.cpp b/examples/Sensor/PCF8563_TimeLib/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/PCF8563_TimeLib/LoRaBoards.cpp
+++ b/examples/Sensor/PCF8563_TimeLib/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/PCF8563_TimeSynchronization/LoRaBoards.cpp b/examples/Sensor/PCF8563_TimeSynchronization/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/PCF8563_TimeSynchronization/LoRaBoards.cpp
+++ b/examples/Sensor/PCF8563_TimeSynchronization/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMC6310_CalibrateExample/LoRaBoards.cpp b/examples/Sensor/QMC6310_CalibrateExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMC6310_CalibrateExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMC6310_CalibrateExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMC6310_CompassExample/LoRaBoards.cpp b/examples/Sensor/QMC6310_CompassExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMC6310_CompassExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMC6310_CompassExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMC6310_GetDataExample/LoRaBoards.cpp b/examples/Sensor/QMC6310_GetDataExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMC6310_GetDataExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMC6310_GetDataExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMC6310_GetPolarExample/LoRaBoards.cpp b/examples/Sensor/QMC6310_GetPolarExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMC6310_GetPolarExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMC6310_GetPolarExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_BlockExample/LoRaBoards.cpp b/examples/Sensor/QMI8658_BlockExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_BlockExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_BlockExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_GetDataExample/LoRaBoards.cpp b/examples/Sensor/QMI8658_GetDataExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_GetDataExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_GetDataExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_InterruptBlockExample/LoRaBoards.cpp b/examples/Sensor/QMI8658_InterruptBlockExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_InterruptBlockExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_InterruptBlockExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_InterruptExample/LoRaBoards.cpp b/examples/Sensor/QMI8658_InterruptExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_InterruptExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_InterruptExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_LockingMechanismExample/LoRaBoards.cpp b/examples/Sensor/QMI8658_LockingMechanismExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_LockingMechanismExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_LockingMechanismExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_MadgwickAHRS/LoRaBoards.cpp b/examples/Sensor/QMI8658_MadgwickAHRS/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_MadgwickAHRS/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_MadgwickAHRS/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_PedometerExample/LoRaBoards.cpp b/examples/Sensor/QMI8658_PedometerExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_PedometerExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_PedometerExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_ReadFromFifoExample/LoRaBoards.cpp b/examples/Sensor/QMI8658_ReadFromFifoExample/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_ReadFromFifoExample/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_ReadFromFifoExample/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/Sensor/QMI8658_WakeOnMotion/LoRaBoards.cpp b/examples/Sensor/QMI8658_WakeOnMotion/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/Sensor/QMI8658_WakeOnMotion/LoRaBoards.cpp
+++ b/examples/Sensor/QMI8658_WakeOnMotion/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/T3S3Factory/LoRaBoards.cpp b/examples/T3S3Factory/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/T3S3Factory/LoRaBoards.cpp
+++ b/examples/T3S3Factory/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)
diff --git a/examples/TBeamFactory/LoRaBoards.cpp b/examples/TBeamFactory/LoRaBoards.cpp
index f5948b4..7e24151 100644
--- a/examples/TBeamFactory/LoRaBoards.cpp
+++ b/examples/TBeamFactory/LoRaBoards.cpp
@@ -909,9 +909,9 @@ void scanDevices(TwoWire *w)
 
 
 #ifdef HAS_GPS
-bool beginGPS()
+
+bool l76kProbe()
 {
-    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
     bool result = false;
     uint32_t startTimeout ;
     SerialGPS.write("$PCAS03,0,0,0,0,0,0,0,0,0,0,,,0,0*02\r\n");
@@ -919,12 +919,13 @@ bool beginGPS()
     // Get version information
     startTimeout = millis() + 3000;
     Serial.print("Try to init L76K . Wait stop .");
-    SerialGPS.flush();
-
+    // SerialGPS.flush();
     while (SerialGPS.available()) {
+        int c = SerialGPS.read();
+        // Serial.write(c);
         // Serial.print(".");
-        Serial.flush();
-        SerialGPS.flush();
+        // Serial.flush();
+        // SerialGPS.flush();
         if (millis() > startTimeout) {
             Serial.println("Wait L76K stop NMEA timeout!");
             return false;
@@ -962,6 +963,19 @@ bool beginGPS()
     return result;
 }
 
+bool beginGPS()
+{
+    SerialGPS.begin(GPS_BAUD_RATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+    bool result = false;
+    for ( int i = 0; i < 3; ++i) {
+        result = l76kProbe();
+        if (result) {
+            return result;
+        }
+    }
+    return result;
+}
+
 
 
 static int getAck(uint8_t *buffer, uint16_t size, uint8_t requestedClass, uint8_t requestedID)