reduced count, created sample set with two rotations: up and sideways

exercises/22_compass/src/main.cpp

@@ -61,7 +61,7 @@ static constexpr uint8_t kMagCandidateCount = 3;
 static constexpr uint8_t kMagCandidates[kMagCandidateCount] = {0x1C, 0x3C, 0x0D};
 static constexpr float kDeclinationDeg = MAG_DECLINATION_DEG;
 static constexpr float kDegPerRad = 57.29577951308232f;
-static constexpr char kApPassword[] = "microreticulum";
+
 
 struct ClockDateTime {
   uint16_t year = 0;
@@ -385,16 +385,18 @@ void handleWebDownload() {
   file.close();
 }
 
-void startWebServer() {
+void startWebServerOLD() {
-  snprintf(g_apSsid, sizeof(g_apSsid), "Compass-%s", kBoardId);
+  // GPSQA-CY is a carry-over from previous exercises, but we can keep the SSID for continuity. 
+  //The unique board ID is in the suffix, and the IP address is fixed based on LOG_AP_IP_OCTET.
+  snprintf(g_apSsid, sizeof(g_apSsid), "GPSQA-%s", kBoardId);
   WiFi.mode(WIFI_AP);
   WiFi.setSleep(false);
   const IPAddress ip(192, 168, LOG_AP_IP_OCTET, 1);
   const IPAddress gw(192, 168, LOG_AP_IP_OCTET, 1);
   const IPAddress nm(255, 255, 255, 0);
   WiFi.softAPConfig(ip, gw, nm);
-
+  // no password required.
-  if (!WiFi.softAP(g_apSsid, kApPassword)) {
+  if (!WiFi.softAP(g_apSsid)) {
     Serial.println("wifi_ap=failed");
     return;
   }
@@ -409,6 +411,52 @@ void startWebServer() {
   Serial.printf("wifi_ap_url=http://192.168.%u.1/\n", (unsigned)LOG_AP_IP_OCTET);
 }
 
+void startWebServer() {
+  // GPSQA-CY is a carry-over from previous exercises, but we can keep the SSID for continuity. 
+  //The unique board ID is in the suffix, and the IP address is fixed based on LOG_AP_IP_OCTET.
+  snprintf(g_apSsid, sizeof(g_apSsid), "GPSQA-%s", kBoardId);
+  WiFi.mode(WIFI_AP);
+  WiFi.setSleep(false);
+
+  const IPAddress ip(192, 168, LOG_AP_IP_OCTET, 1);
+  const IPAddress gw(192, 168, LOG_AP_IP_OCTET, 1);
+  const IPAddress nm(255, 255, 255, 0);
+
+  const bool cfgOk = WiFi.softAPConfig(ip, gw, nm);
+  Serial.printf("wifi_ap_config=%s\n", cfgOk ? "ok" : "failed");
+  // no password required.
+  if (!WiFi.softAP(g_apSsid)) {
+    Serial.println("wifi_ap=failed");
+    return;
+  }
+
+  Serial.println("wifi_ap=started");
+  Serial.printf("wifi_ap_ssid=%s\n", g_apSsid);
+  Serial.printf("wifi_ap_ip=%s\n", WiFi.softAPIP().toString().c_str());
+  Serial.printf("wifi_station_count=%d\n", WiFi.softAPgetStationNum());
+
+  g_server.on("/", HTTP_GET, []() {
+    Serial.println("http_hit=/");
+    handleWebIndex();
+  });
+  g_server.on("/files", HTTP_GET, []() {
+    Serial.println("http_hit=/files");
+    handleWebFiles();
+  });
+  g_server.on("/download", HTTP_GET, []() {
+    Serial.println("http_hit=/download");
+    handleWebDownload();
+  });
+
+  g_server.onNotFound([]() {
+    Serial.printf("http_404 uri=%s\n", g_server.uri().c_str());
+    g_server.send(404, "text/plain", "not found\n");
+  });
+
+  g_server.begin();
+  g_webReady = true;
+}
+
 bool probeI2cAddr(TwoWire& wire, uint8_t addr) {
   wire.beginTransmission(addr);
   return wire.endTransmission() == 0;
@@ -721,6 +769,14 @@ void appSetup() {
   g_lastHeartbeatMs = millis();
 }
 
+// We want to capture a reasonable amount of data for calibration and testing, 
+// bu we also want to avoid creating huge logs or overwhelming the display. 
+// 600 samples at 200ms intervals is 2 minutes of data, which should be enough 
+// for calibration and testing.
+// Adjust the sample_limit as needed based on your specific requirements and constraints.
+
+uint32_t sample_limit = 600;
+uint32_t sample_count = 0;
 void appLoop() {
   if (g_webReady) {
     g_server.handleClient();
@@ -730,28 +786,32 @@ void appLoop() {
   g_sdMounted = g_sd.isMounted();
 
   const uint32_t now = millis();
-  if ((uint32_t)(now - g_lastSampleMs) >= kSampleIntervalMs) {
+  if (sample_count <= sample_limit) { 
-    g_lastSampleMs = now;
+    if ((uint32_t)(now - g_lastSampleMs) >= kSampleIntervalMs) {
-    MagSample sample{};
+      g_lastSampleMs = now;
-    if (captureSample(sample)) {
+      MagSample sample{};
-      g_lastSample = sample;
+      if (captureSample(sample)) {
-      printSampleToSerial(sample);
+        sample_count++; 
-      appendSampleToLog(sample);
+        g_lastSample = sample;
+        printSampleToSerial(sample);
+        appendSampleToLog(sample);
+      }
     }
-  }
 
-  if ((uint32_t)(now - g_lastDisplayMs) >= kDisplayIntervalMs) {
+    if ((uint32_t)(now - g_lastDisplayMs) >= kDisplayIntervalMs) {
-    g_lastDisplayMs = now;
+      g_lastDisplayMs = now;
-    drawLiveUi();
+      drawLiveUi();
+    }
   }
 
   if ((uint32_t)(now - g_lastHeartbeatMs) >= 5000) {
     g_lastHeartbeatMs = now;
-    Serial.printf("alive seq=%lu log=%s web=%s sd=%s\n",
+    Serial.printf("alive seq=%lu log=%s web=%s sd=%s sta=%d\n",
-                  (unsigned long)g_lastSample.seq,
+              (unsigned long)g_lastSample.seq,
-                  g_logOpen ? "open" : "closed",
+              g_logOpen ? "open" : "closed",
-                  g_webReady ? "up" : "down",
+              g_webReady ? "up" : "down",
-                  g_sdMounted ? "mounted" : "absent");
+              g_sdMounted ? "mounted" : "absent",
+              WiFi.softAPgetStationNum());
   }
 }