Rain alarm - Proto 2 - Rain Sensor Transmitter

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)
    ;

  Serial.println("Starting...");
  pinMode(SWITCH_PIN, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);

  Serial.println("LoRa Sender");
  LoRa.setPins(ss, rst, dio0);
  while (!LoRa.begin(433E6))
  {
    Serial.println(".");
    delay(500);
  }
  LoRa.setSyncWord(0x7E);
  Serial.println("LoRa Initializing OK!");
}

void loop()
{
  int switchState = digitalRead(SWITCH_PIN);
  if (switchState == LOW)
  {
    digitalWrite(LED_PIN, HIGH);
  }
  else
  {
    digitalWrite(LED_PIN, LOW);
  }

  Payload data;
  data.rain = switchState == LOW ? 1 : 0;

  LoRa.beginPacket();
  LoRa.write((uint8_t *)&data, sizeof(Payload));
  LoRa.endPacket();
  Serial.print(".");
}