Update examples
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/*
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RadioLib Receive with Interrupts Example
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This example listens for LoRa transmissions and tries to
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receive them. Once a packet is received, an interrupt is
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triggered. To successfully receive data, the following
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settings have to be the same on both transmitter
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and receiver:
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- carrier frequency
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- bandwidth
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- spreading factor
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- coding rate
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- sync word
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For full API reference, see the GitHub Pages
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https://jgromes.github.io/RadioLib/
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*/
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#include <RadioLib.h>
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#include "LoRaBoards.h"
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#if defined(USING_SX1276)
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#define CONFIG_RADIO_FREQ 868.0
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#define CONFIG_RADIO_OUTPUT_POWER 17
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#define CONFIG_RADIO_BW 125.0
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SX1276 radio = new Module(RADIO_CS_PIN, RADIO_DIO0_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
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#elif defined(USING_SX1278)
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#define CONFIG_RADIO_FREQ 433.0
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#define CONFIG_RADIO_OUTPUT_POWER 17
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#define CONFIG_RADIO_BW 125.0
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SX1278 radio = new Module(RADIO_CS_PIN, RADIO_DIO0_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
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#elif defined(USING_SX1262)
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#define CONFIG_RADIO_FREQ 868.0
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#define CONFIG_RADIO_OUTPUT_POWER 22
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#define CONFIG_RADIO_BW 125.0
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SX1262 radio = new Module(RADIO_CS_PIN, RADIO_DIO1_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
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#elif defined(USING_SX1280)
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#define CONFIG_RADIO_FREQ 2400.0
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#define CONFIG_RADIO_OUTPUT_POWER 13
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#define CONFIG_RADIO_BW 203.125
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SX1280 radio = new Module(RADIO_CS_PIN, RADIO_DIO1_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
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#elif defined(USING_SX1268)
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#define CONFIG_RADIO_FREQ 433.0
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#define CONFIG_RADIO_OUTPUT_POWER 22
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#define CONFIG_RADIO_BW 125.0
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SX1268 radio = new Module(RADIO_CS_PIN, RADIO_DIO1_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
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#elif defined(USING_LR1121)
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#define CONFIG_RADIO_FREQ 868.0
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#define CONFIG_RADIO_OUTPUT_POWER 22
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#define CONFIG_RADIO_BW 125.0
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LR1121 radio = new Module(RADIO_CS_PIN, RADIO_DIO9_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
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#endif
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// flag to indicate that a packet was received
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static volatile bool receivedFlag = false;
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static String rssi = "0dBm";
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static String snr = "0dB";
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static String payload = "0";
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// this function is called when a complete packet
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// is received by the module
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// IMPORTANT: this function MUST be 'void' type
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// and MUST NOT have any arguments!
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void setFlag(void)
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{
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// we got a packet, set the flag
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receivedFlag = true;
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}
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void setup()
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{
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setupBoards();
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// When the power is turned on, a delay is required.
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delay(1500);
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#ifdef RADIO_TCXO_ENABLE
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pinMode(RADIO_TCXO_ENABLE, OUTPUT);
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digitalWrite(RADIO_TCXO_ENABLE, HIGH);
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#endif
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// initialize radio with default settings
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int state = radio.begin();
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printResult(state == RADIOLIB_ERR_NONE);
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Serial.print(F("Radio Initializing ... "));
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if (state == RADIOLIB_ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code "));
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Serial.println(state);
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while (true);
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}
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// set the function that will be called
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// when new packet is received
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radio.setPacketReceivedAction(setFlag);
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/*
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* Sets carrier frequency.
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* SX1278/SX1276 : Allowed values range from 137.0 MHz to 525.0 MHz.
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* SX1268/SX1262 : Allowed values are in range from 150.0 to 960.0 MHz.
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* SX1280 : Allowed values are in range from 2400.0 to 2500.0 MHz.
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* LR1121 : Allowed values are in range from 150.0 to 960.0 MHz, 1900 - 2200 MHz and 2400 - 2500 MHz. Will also perform calibrations.
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* * * */
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if (radio.setFrequency(CONFIG_RADIO_FREQ) == RADIOLIB_ERR_INVALID_FREQUENCY) {
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Serial.println(F("Selected frequency is invalid for this module!"));
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while (true);
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}
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/*
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* Sets LoRa link bandwidth.
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* SX1278/SX1276 : Allowed values are 10.4, 15.6, 20.8, 31.25, 41.7, 62.5, 125, 250 and 500 kHz. Only available in %LoRa mode.
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* SX1268/SX1262 : Allowed values are 7.8, 10.4, 15.6, 20.8, 31.25, 41.7, 62.5, 125.0, 250.0 and 500.0 kHz.
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* SX1280 : Allowed values are 203.125, 406.25, 812.5 and 1625.0 kHz.
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* LR1121 : Allowed values are 62.5, 125.0, 250.0 and 500.0 kHz.
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* * * */
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if (radio.setBandwidth(125.0) == RADIOLIB_ERR_INVALID_BANDWIDTH) {
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Serial.println(F("Selected bandwidth is invalid for this module!"));
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while (true);
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}
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/*
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* Sets LoRa link spreading factor.
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* SX1278/SX1276 : Allowed values range from 6 to 12. Only available in LoRa mode.
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* SX1262 : Allowed values range from 5 to 12.
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* SX1280 : Allowed values range from 5 to 12.
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* LR1121 : Allowed values range from 5 to 12.
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* * * */
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if (radio.setSpreadingFactor(10) == RADIOLIB_ERR_INVALID_SPREADING_FACTOR) {
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Serial.println(F("Selected spreading factor is invalid for this module!"));
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while (true);
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}
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/*
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* Sets LoRa coding rate denominator.
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* SX1278/SX1276/SX1268/SX1262 : Allowed values range from 5 to 8. Only available in LoRa mode.
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* SX1280 : Allowed values range from 5 to 8.
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* LR1121 : Allowed values range from 5 to 8.
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* * * */
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if (radio.setCodingRate(6) == RADIOLIB_ERR_INVALID_CODING_RATE) {
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Serial.println(F("Selected coding rate is invalid for this module!"));
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while (true);
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}
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/*
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* Sets LoRa sync word.
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* SX1278/SX1276/SX1268/SX1262/SX1280 : Sets LoRa sync word. Only available in LoRa mode.
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* * */
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if (radio.setSyncWord(0xAB) != RADIOLIB_ERR_NONE) {
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Serial.println(F("Unable to set sync word!"));
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while (true);
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}
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/*
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* Sets transmission output power.
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* SX1278/SX1276 : Allowed values range from -3 to 15 dBm (RFO pin) or +2 to +17 dBm (PA_BOOST pin). High power +20 dBm operation is also supported, on the PA_BOOST pin. Defaults to PA_BOOST.
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* SX1262 : Allowed values are in range from -9 to 22 dBm. This method is virtual to allow override from the SX1261 class.
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* SX1268 : Allowed values are in range from -9 to 22 dBm.
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* SX1280 : Allowed values are in range from -18 to 13 dBm.
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* LR1121 : Allowed values are in range from -9 to 22 dBm (high-power PA) or -17 to 14 dBm (low-power PA)
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* * * */
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if (radio.setOutputPower(CONFIG_RADIO_OUTPUT_POWER) == RADIOLIB_ERR_INVALID_OUTPUT_POWER) {
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Serial.println(F("Selected output power is invalid for this module!"));
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while (true);
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}
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#if !defined(USING_SX1280) && !defined(USING_LR1121)
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/*
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* Sets current limit for over current protection at transmitter amplifier.
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* SX1278/SX1276 : Allowed values range from 45 to 120 mA in 5 mA steps and 120 to 240 mA in 10 mA steps.
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* SX1262/SX1268 : Allowed values range from 45 to 120 mA in 2.5 mA steps and 120 to 240 mA in 10 mA steps.
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* NOTE: set value to 0 to disable overcurrent protection
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* * * */
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if (radio.setCurrentLimit(140) == RADIOLIB_ERR_INVALID_CURRENT_LIMIT) {
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Serial.println(F("Selected current limit is invalid for this module!"));
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while (true);
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}
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#endif
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/*
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* Sets preamble length for LoRa or FSK modem.
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* SX1278/SX1276 : Allowed values range from 6 to 65535 in %LoRa mode or 0 to 65535 in FSK mode.
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* SX1262/SX1268 : Allowed values range from 1 to 65535.
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* SX1280 : Allowed values range from 1 to 65535.
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* LR1121 : Allowed values range from 1 to 65535.
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* * */
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if (radio.setPreambleLength(15) == RADIOLIB_ERR_INVALID_PREAMBLE_LENGTH) {
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Serial.println(F("Selected preamble length is invalid for this module!"));
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while (true);
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}
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// Enables or disables CRC check of received packets.
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if (radio.setCRC(false) == RADIOLIB_ERR_INVALID_CRC_CONFIGURATION) {
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Serial.println(F("Selected CRC is invalid for this module!"));
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while (true);
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}
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#ifdef USING_DIO2_AS_RF_SWITCH
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#ifdef USING_SX1262
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// Some SX126x modules use DIO2 as RF switch. To enable
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// this feature, the following method can be used.
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// NOTE: As long as DIO2 is configured to control RF switch,
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// it can't be used as interrupt pin!
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if (radio.setDio2AsRfSwitch() != RADIOLIB_ERR_NONE) {
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Serial.println(F("Failed to set DIO2 as RF switch!"));
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while (true);
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}
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#endif //USING_SX1262
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#endif //USING_DIO2_AS_RF_SWITCH
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#ifdef RADIO_RX_PIN
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// SX1280 PA Version
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radio.setRfSwitchPins(RADIO_RX_PIN, RADIO_TX_PIN);
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#endif
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#ifdef RADIO_SWITCH_PIN
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// T-MOTION
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const uint32_t pins[] = {
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RADIO_SWITCH_PIN, RADIO_SWITCH_PIN, RADIOLIB_NC,
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};
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static const Module::RfSwitchMode_t table[] = {
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{Module::MODE_IDLE, {0, 0} },
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{Module::MODE_RX, {1, 0} },
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{Module::MODE_TX, {0, 1} },
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END_OF_MODE_TABLE,
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};
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radio.setRfSwitchTable(pins, table);
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#endif
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delay(1000);
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// start listening for LoRa packets
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Serial.print(F("Radio Starting to listen ... "));
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state = radio.startReceive();
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if (state == RADIOLIB_ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code "));
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Serial.println(state);
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}
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drawMain();
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}
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void loop()
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{
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// check if the flag is set
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if (receivedFlag) {
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// reset flag
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receivedFlag = false;
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// you can read received data as an Arduino String
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int state = radio.readData(payload);
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// you can also read received data as byte array
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/*
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byte byteArr[8];
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int state = radio.readData(byteArr, 8);
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*/
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flashLed();
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if (state == RADIOLIB_ERR_NONE) {
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rssi = String(radio.getRSSI()) + "dBm";
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snr = String(radio.getSNR()) + "dB";
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drawMain();
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// packet was successfully received
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Serial.println(F("Radio Received packet!"));
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// print data of the packet
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Serial.print(F("Radio Data:\t\t"));
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Serial.println(payload);
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// print RSSI (Received Signal Strength Indicator)
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Serial.print(F("Radio RSSI:\t\t"));
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Serial.println(rssi);
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// print SNR (Signal-to-Noise Ratio)
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Serial.print(F("Radio SNR:\t\t"));
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Serial.println(snr);
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} else if (state == RADIOLIB_ERR_CRC_MISMATCH) {
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// packet was received, but is malformed
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Serial.println(F("CRC error!"));
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} else {
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// some other error occurred
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Serial.print(F("failed, code "));
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Serial.println(state);
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}
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// put module back to listen mode
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radio.startReceive();
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}
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}
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void drawMain()
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{
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if (u8g2) {
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u8g2->clearBuffer();
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u8g2->drawRFrame(0, 0, 128, 64, 5);
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u8g2->setFont(u8g2_font_pxplusibmvga8_mr);
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u8g2->setCursor(15, 20);
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u8g2->print("RX:");
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u8g2->setCursor(15, 35);
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u8g2->print("SNR:");
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u8g2->setCursor(15, 50);
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u8g2->print("RSSI:");
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u8g2->setFont(u8g2_font_crox1h_tr);
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u8g2->setCursor( U8G2_HOR_ALIGN_RIGHT(payload.c_str()) - 21, 20 );
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u8g2->print(payload);
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u8g2->setCursor( U8G2_HOR_ALIGN_RIGHT(rssi.c_str()) - 21, 35 );
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u8g2->print(rssi);
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u8g2->setCursor( U8G2_HOR_ALIGN_RIGHT(snr.c_str()) - 21, 50 );
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u8g2->print(snr);
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u8g2->sendBuffer();
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}
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}
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