Communication between two embedded devices using UART port with code

 Communication between two embedded devices (Arduino Kit) using UART port with code

Components Required:

1) Arduino Uno R3 (x2)

2) Push Button

3) Resistor 220 Ohm

4) Breadboard Mini (x2)

5) Led

Code for Circuit:

Code for Arduino Uno 3 - connected with push button

void setup() {

  //set push button pin as input

  pinMode(6, INPUT_PULLUP); 

  //initialize UART with baud rate of 9600 bps

  Serial.begin(9600);       

}

void loop() 

{

  {

  if (digitalRead(6) == HIGH)

    {

      Serial.write('0');

      Serial.println("HIGH");

    }

  else

    {

      Serial.write('1');

  Serial.println("LOW");

    }

  }

  delay(100);

}

Code for Arduino Uno 3 - connected with led

void setup() {

  //set LED pin as output

  pinMode(8, OUTPUT);      

  //initialize UART with baud rate of 9600 bps

  Serial.begin(9600);       

}

void loop() {

  if(Serial.available()) 

  {

    //read one byte from serial buffer and save to data_rcvd

    char data_received = Serial.read();   

    //if push button pressed switch LED On

    if(data_received == '1') digitalWrite(8, HIGH);

    //if push button is not pressed switch LED Off

    if(data_received == '0') digitalWrite(8, LOW);   

  }

}