Example Code for Arduino-RS485 Transmit Data

Sample Code

int EN = 2; //RS485 has a enable/disable pin to transmit or receive data. Arduino Digital Pin 2 = Rx/Tx 'Enable'; High to Transmit, Low to Receive

void setup()
{
  pinMode(EN, OUTPUT);
  Serial.begin(19200);
}

void loop()
{
// send data
  digitalWrite(EN, HIGH);//Enable data transmit
  Serial.print('A');
  delay(1000);
}

Compatibility