kopia lustrzana https://github.com/jgromes/RadioLib
146 wiersze
3.8 KiB
C++
146 wiersze
3.8 KiB
C++
/*
|
|
RadioLib SX127x Ping-Pong Example
|
|
|
|
For default module settings, see the wiki page
|
|
https://github.com/jgromes/RadioLib/wiki/Default-configuration#sx127xrfm9x---lora-modem
|
|
|
|
For full API reference, see the GitHub Pages
|
|
https://jgromes.github.io/RadioLib/
|
|
*/
|
|
|
|
// include the library
|
|
#include <RadioLib.h>
|
|
|
|
// uncomment the following only on one
|
|
// of the nodes to initiate the pings
|
|
//#define INITIATING_NODE
|
|
|
|
// SX1278 has the following connections:
|
|
// NSS pin: 10
|
|
// DIO0 pin: 2
|
|
// NRST pin: 9
|
|
// DIO1 pin: 3
|
|
SX1278 radio = new Module(10, 2, 9, 3);
|
|
|
|
// or using RadioShield
|
|
// https://github.com/jgromes/RadioShield
|
|
//SX1278 radio = RadioShield.ModuleA;
|
|
|
|
// save transmission states between loops
|
|
int transmissionState = RADIOLIB_ERR_NONE;
|
|
|
|
// flag to indicate transmission or reception state
|
|
bool transmitFlag = false;
|
|
|
|
// flag to indicate that a packet was sent or received
|
|
volatile bool operationDone = false;
|
|
|
|
// this function is called when a complete packet
|
|
// is transmitted or received by the module
|
|
// IMPORTANT: this function MUST be 'void' type
|
|
// and MUST NOT have any arguments!
|
|
#if defined(ESP8266) || defined(ESP32)
|
|
ICACHE_RAM_ATTR
|
|
#endif
|
|
void setFlag(void) {
|
|
// we sent or received packet, set the flag
|
|
operationDone = true;
|
|
}
|
|
|
|
void setup() {
|
|
Serial.begin(9600);
|
|
|
|
// initialize SX1278 with default settings
|
|
Serial.print(F("[SX1278] Initializing ... "));
|
|
int state = radio.begin();
|
|
if (state == RADIOLIB_ERR_NONE) {
|
|
Serial.println(F("success!"));
|
|
} else {
|
|
Serial.print(F("failed, code "));
|
|
Serial.println(state);
|
|
while (true);
|
|
}
|
|
|
|
// set the function that will be called
|
|
// when new packet is received
|
|
radio.setDio0Action(setFlag, RISING);
|
|
|
|
#if defined(INITIATING_NODE)
|
|
// send the first packet on this node
|
|
Serial.print(F("[SX1278] Sending first packet ... "));
|
|
transmissionState = radio.startTransmit("Hello World!");
|
|
transmitFlag = true;
|
|
#else
|
|
// start listening for LoRa packets on this node
|
|
Serial.print(F("[SX1278] Starting to listen ... "));
|
|
state = radio.startReceive();
|
|
if (state == RADIOLIB_ERR_NONE) {
|
|
Serial.println(F("success!"));
|
|
} else {
|
|
Serial.print(F("failed, code "));
|
|
Serial.println(state);
|
|
while (true);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void loop() {
|
|
// check if the previous operation finished
|
|
if(operationDone) {
|
|
// reset flag
|
|
operationDone = false;
|
|
|
|
if(transmitFlag) {
|
|
// the previous operation was transmission, listen for response
|
|
// print the result
|
|
if (transmissionState == RADIOLIB_ERR_NONE) {
|
|
// packet was successfully sent
|
|
Serial.println(F("transmission finished!"));
|
|
|
|
} else {
|
|
Serial.print(F("failed, code "));
|
|
Serial.println(transmissionState);
|
|
|
|
}
|
|
|
|
// listen for response
|
|
radio.startReceive();
|
|
transmitFlag = false;
|
|
|
|
} else {
|
|
// the previous operation was reception
|
|
// print data and send another packet
|
|
String str;
|
|
int state = radio.readData(str);
|
|
|
|
if (state == RADIOLIB_ERR_NONE) {
|
|
// packet was successfully received
|
|
Serial.println(F("[SX1278] Received packet!"));
|
|
|
|
// print data of the packet
|
|
Serial.print(F("[SX1278] Data:\t\t"));
|
|
Serial.println(str);
|
|
|
|
// print RSSI (Received Signal Strength Indicator)
|
|
Serial.print(F("[SX1278] RSSI:\t\t"));
|
|
Serial.print(radio.getRSSI());
|
|
Serial.println(F(" dBm"));
|
|
|
|
// print SNR (Signal-to-Noise Ratio)
|
|
Serial.print(F("[SX1278] SNR:\t\t"));
|
|
Serial.print(radio.getSNR());
|
|
Serial.println(F(" dB"));
|
|
|
|
}
|
|
|
|
// wait a second before transmitting again
|
|
delay(1000);
|
|
|
|
// send another one
|
|
Serial.print(F("[SX1278] Sending another packet ... "));
|
|
transmissionState = radio.startTransmit("Hello World!");
|
|
transmitFlag = true;
|
|
}
|
|
}
|
|
}
|