One of the great challenges that companies face, as if it were a long-distance career, is the adoption of new technologies that appear. Although it is physically impossible to be up to date on everything, it is necessary to have a global vision of the company, and to know what technologies you can implement to obtain all kinds of benefits such as:

• greater safety for operators,

• improvement of production rates,

• savings in materials or

• Preventive Maintenance,

to name a few.

The following code has the function of communicating the Master and the Slave sending the instruction to activate the relay to turn on a water pump.

An example of Simplecomm Master communication:

#include <RS485.h>
#include <SimpleComm.h>

// Create SimplePacket for sending and receiving data
SimplePacket packet;

// Define master address
uint8_t masterAddress = 0;

// Define slave address to communicate with
uint8_t slaveAddress = 1;

// Value to send as packet data
int value = 5;

////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
	Serial.begin(9600L);

  // Start RS485
  RS485.begin(19200L);
  RS485.setTimeout(20);

  // Start SimpleComm
  SimpleComm.begin(masterAddress);
}

////////////////////////////////////////////////////////////////////////////////////////////////////
void loop() {
  static unsigned long lastSent = millis();

  // Send packet periodically: once per second
  if (millis() - lastSent >= 10000) {
    // Set request packet data
    packet.setData(value);

    // Send request to slave
    if (SimpleComm.send(RS485, packet, slaveAddress)) {
      lastSent = millis();

      Serial.print("Sent value: ");
      Serial.println(value);
    }
  }

  // Get responses
  if (SimpleComm.receive(RS485, packet)) {
    // Update value from the response
    value = packet.getInt();

    Serial.print("Received value: ");
    Serial.println(value);
  }
}

An example of Simplecomm Slave communication:

#include <RS485.h>
#include <SimpleComm.h>

// Create SimplePacket for sending and receiving data
SimplePacket request;
SimplePacket response;

// Define slave address to communicate with
uint8_t slaveAddress = 1;

////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
	Serial.begin(9600L);

  // Start RS485
  RS485.begin(19200L);
  RS485.setTimeout(20);

  // Start SimpleComm
  SimpleComm.begin(slaveAddress);
}

////////////////////////////////////////////////////////////////////////////////////////////////////
void loop() {
  // Get requests
  if (SimpleComm.receive(RS485, request)) {
    int value = request.getInt();

    Serial.print("Received value: ");
    Serial.println(value);
if ( value==5){
  digitalWrite(R0_8,HIGH);
  delay(5000);
  digitalWrite(R0_8,LOW);
  
}
    // Process value
    //value++;

    // Send response to the request packet source
    response.setData(value);
    if (SimpleComm.send(RS485, response, request.getSource())) {
      Serial.print("Sent value: ");
      Serial.println(value);
    }
  }
}