Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

 

Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

//SLAVE

#include

#include

LiquidCrystal lcd(12,11,5,4,3,2);

void setup()

{

  Serial.begin(9600);

  Wire.begin(1);

  Wire.onReceive(reading);

  lcd.begin(16,2);

}

void loop()

{

  delay(50);

}

void reading(int y)

{

  signed int voltage=Wire.read();

  lcd.setCursor(0,0);

  lcd.print("the voltage is ");

  //lcd.setCursor(0,1);

  lcd.print(voltage);

  //Serial.print("voltage value\n");

  //Serial.println(5);

  delay(50);

}

//MASTER

#include

void setup()

{

  pinMode(A1, INPUT);

  Serial.begin(9600);

  Wire.begin();

  pinMode(10, OUTPUT);

}

void loop()

{

  float value=analogRead(A1);

  signed int voltage=(value*5)/1024;

  analogWrite(10 , voltage*50);

 // int temp=(voltage-0.5)*100;

  Wire.beginTransmission(1);

  Wire.write(voltage);

  Wire.endTransmission();

  delay(50);

}