LoRa Module (LR1262)

#include <RadioLib.h>

SPIClass loraSPI(FSPI);
SX1262 radio = new Module(P1_IO1, P1_IO0, RADIOLIB_NC, P1_IO2, loraSPI);

int txCount = 0;
bool transmitting = true;
unsigned long phaseStart = 0;

void setup() {
  Serial.begin(115200);
  loraSPI.begin(SCK, MISO, MOSI);

  int st = radio.begin(915.0, 125.0, 7, 5, 0x12, 22, 8, 1.8);
  if (st != RADIOLIB_ERR_NONE) {
    Serial.print("LoRa begin failed: ");
    Serial.println(st);
    while (true);
  }
  radio.setDio2AsRfSwitch(true);
  Serial.println("LoRa ready — 915 MHz SF7 BW125");

  phaseStart = millis();
}

void loop() {
  unsigned long now = millis();

  if (transmitting) {
    // — TX phase: send one packet then switch to RX for 1 s —
    char msg[32];
    snprintf(msg, sizeof(msg), "ping %d", txCount++);
    int st = radio.transmit(msg);
    if (st == RADIOLIB_ERR_NONE) {
      Serial.print("Sent: ");
      Serial.println(msg);
    } else {
      Serial.print("TX error: ");
      Serial.println(st);
    }
    transmitting = false;
    phaseStart = now;

  } else {
    // — RX phase: poll for 1 s —
    String recv;
    int st = radio.receive(recv, 1000);   // blocking, 1 s timeout
    if (st == RADIOLIB_ERR_NONE) {
      Serial.print("Recv: ");
      Serial.println(recv);
      Serial.print("  RSSI: "); Serial.print(radio.getRSSI()); Serial.println(" dBm");
      Serial.print("  SNR:  "); Serial.print(radio.getSNR());  Serial.println(" dB");
    } else if (st != RADIOLIB_ERR_RX_TIMEOUT) {
      Serial.print("RX error: ");
      Serial.println(st);
    }
    transmitting = true;
  }
}