Rain alarm - Proto 2 - Base Station Receiver

main.cpp

#include <LoRa.h>
#include <SPI.h>

#define ss 5
#define rst 14
#define dio0 4

int SWITCH_PIN = 15;
int LED_PIN = 2;

struct Payload
{
  int rain;
};

void setup()
{

  Serial.begin(115200);
  while (!Serial)
    ;

  pinMode(LED_PIN, OUTPUT);
  Serial.println("LoRa Receiver");

  LoRa.setPins(ss, rst, dio0);

  while (!LoRa.begin(433E6))
  {
    Serial.println(".");
    delay(500);
  }
  LoRa.setSyncWord(0x7E);
  Serial.println("LoRa Initializing OK!");
}

void loop()
{
  int packetSize = LoRa.parsePacket();
  if (packetSize)
  {
    Payload data;
    if (packetSize == sizeof(Payload))
    {
      LoRa.readBytes((uint8_t *)&data, sizeof(Payload));

      if (data.rain == 1)
      {
        digitalWrite(LED_PIN, HIGH);
      }
      else
      {
        digitalWrite(LED_PIN, LOW);
      }

      Serial.print("Raw packet data: ");
      uint8_t *dataPtr = (uint8_t *)&data;
      for (size_t i = 0; i < sizeof(Payload); ++i)
      {
        Serial.print(dataPtr[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
    }
  }
  Serial.print(".");
}