#define soil_moisture_pin 14
#define TX_PIN 2      // TX pin for RS485 communication
#define RX_PIN 1      // RX pin for RS485 communication
#define CMD_PIN 3     // Direction control pin for RS485 (DE/RE)

void setup() {
  Serial.begin(9600);
  pinMode(soil_moisture_pin, INPUT);

  // Initialize UART for RS485
  Serial1.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN); 

  // Set CMD_PIN as OUTPUT
  pinMode(CMD_PIN, OUTPUT);

  // Start in receive mode
  digitalWrite(CMD_PIN, LOW); 
}

void loop() {
  int soilMoistureValue = analogRead(soil_moisture_pin);
  Serial.print("Soil Moisture Value: ");
  Serial.println(soilMoistureValue);

  // Send soil moisture data via RS485
  digitalWrite(CMD_PIN, HIGH); 
  Serial1.print("Soil Moisture Value: ");
  Serial1.println(soilMoistureValue);
  delay(500);

  // Switch to receive mode
  digitalWrite(CMD_PIN, LOW);

  // Check for incoming data
  if (Serial1.available()) {
    String receivedData = Serial1.readString();
    Serial.print("Received via RS485: ");
    Serial.println(receivedData);
  }

  delay(1000);
}