Arduino to Arduino Communication via Tx/Rx

Arduino to Arduino Communication via Tx/Rx

3/5/2017

Scope: 
  Experience using Tx/Rx to communicate a slave Arduino from the Master Arduino

Setup: 

• Connect Vcc to Vcc
• Connect GND to GND
• Connect Tx to Rx
• Connect Rx to Tx

Demo:

Master Arduino Code:

/*Master Arduino Code
 * 3/5/17
 Scope: Experience COM communication between Arduino
 Approach: Send a command via Tx/Rx from one Arduino to another Arduino.
 */

void setup() {
  // initialize serial:
  Serial.begin(9600);
  pinMode(9, OUTPUT);
}

void loop() {
  //Turn on LED for 1 sec
  digitalWrite(9, HIGH);
  delay(500);
  digitalWrite(9, LOW);

  //Send instruction via COM
  Serial.print("9 5 200");

  //Wait until above instruction is completed
  delay(3000);
}

Slave Arduino Code:

/* Slave Arduino Code

By Samson Yang 3/5/2017

This is a simple demo of how to use Arduino control another Arduino 'via' Tx/Rx.

*/

void setup() {

  // initialize serial:

  Serial.begin(9600);

  // make the pins outputs:

  pinMode(9, OUTPUT);

}

void loop() {

  // if there's any serial available, read it:

  while (Serial.available() > 0) {

    int Pin = Serial.parseInt();

    int Count = Serial.parseInt();

    int delay_time = Serial.parseInt();      

    if((Pin==9)){LED_Blinking(Pin,Count,delay_time);}

  }    

}

//Control LED blinking on pin 9

void LED_Blinking(int Pin,int Count,int delay_time){  

  //Blank LED

  for (int i = 0;i<Count;i++){

    digitalWrite(Pin, HIGH);delay(delay_time/2);digitalWrite(Pin, LOW);delay(delay_time/2);

  }

}