163 lines
4.2 KiB
C++
163 lines
4.2 KiB
C++
/*
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RadioLib SX126x Ping-Pong Example
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For default module settings, see the wiki page
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https://github.com/jgromes/RadioLib/wiki/Default-configuration#sx126x---lora-modem
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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 the library
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#include <RadioLib.h>
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// uncomment the following only on one
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// of the nodes to initiate the pings
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//#define INITIATING_NODE
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// SX1262 has the following connections:
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// NSS pin: 10
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// DIO1 pin: 2
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// NRST pin: 3
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// BUSY pin: 9
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SX1262 radio = new Module(10, 2, 3, 9);
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// or using RadioShield
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// https://github.com/jgromes/RadioShield
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//SX1262 radio = RadioShield.ModuleA;
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// or using CubeCell
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//SX1262 radio = new Module(RADIOLIB_BUILTIN_MODULE);
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// save transmission states between loops
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int transmissionState = RADIOLIB_ERR_NONE;
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// flag to indicate transmission or reception state
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bool transmitFlag = false;
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// disable interrupt when it's not needed
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volatile bool enableInterrupt = true;
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// flag to indicate that a packet was sent or received
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volatile bool operationDone = false;
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// this function is called when a complete packet
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// is transmitted or 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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// check if the interrupt is enabled
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if(!enableInterrupt) {
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return;
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}
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// we sent aor received packet, set the flag
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operationDone = true;
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}
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void setup() {
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Serial.begin(9600);
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// initialize SX1262 with default settings
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Serial.print(F("[SX1262] Initializing ... "));
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int state = radio.begin();
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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.setDio1Action(setFlag);
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#if defined(INITIATING_NODE)
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// send the first packet on this node
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Serial.print(F("[SX1262] Sending first packet ... "));
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transmissionState = radio.startTransmit("Hello World!");
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transmitFlag = true;
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#else
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// start listening for LoRa packets on this node
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Serial.print(F("[SX1262] 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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while (true);
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}
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#endif
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}
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void loop() {
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// check if the previous operation finished
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if(operationDone) {
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// disable the interrupt service routine while
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// processing the data
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enableInterrupt = false;
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// reset flag
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operationDone = false;
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if(transmitFlag) {
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// the previous operation was transmission, listen for response
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// print the result
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if (transmissionState == RADIOLIB_ERR_NONE) {
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// packet was successfully sent
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Serial.println(F("transmission finished!"));
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} else {
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Serial.print(F("failed, code "));
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Serial.println(transmissionState);
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}
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// listen for response
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radio.startReceive();
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transmitFlag = false;
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} else {
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// the previous operation was reception
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// print data and send another packet
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String str;
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int state = radio.readData(str);
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if (state == RADIOLIB_ERR_NONE) {
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// packet was successfully received
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Serial.println(F("[SX1262] Received packet!"));
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// print data of the packet
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Serial.print(F("[SX1262] Data:\t\t"));
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Serial.println(str);
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// print RSSI (Received Signal Strength Indicator)
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Serial.print(F("[SX1262] RSSI:\t\t"));
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Serial.print(radio.getRSSI());
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Serial.println(F(" dBm"));
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// print SNR (Signal-to-Noise Ratio)
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Serial.print(F("[SX1262] SNR:\t\t"));
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Serial.print(radio.getSNR());
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Serial.println(F(" dB"));
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}
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// wait a second before transmitting again
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delay(1000);
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// send another one
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Serial.print(F("[SX1262] Sending another packet ... "));
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transmissionState = radio.startTransmit("Hello World!");
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transmitFlag = true;
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}
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// we're ready to process more packets,
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// enable interrupt service routine
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enableInterrupt = true;
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}
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}
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