Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol
master code: #include<Wire.h>
#include<LiquidCrystal.h> // library for LCD display function
LiquidCrystal lcd(2, 7, 8,9,10,11); //define LCD module pins
void setup()
{
lcd.begin(16,2);
lcd.setCursor(0,0);
lcd.print("skill lync");
lcd.setCursor(0,1);
lcd.print("I2C ARSUINO 2 ARDUINO");
for(int i=0;i<16;i++)
lcd.scrollDisplayLeft();
delay(100);
}
delay(2000);
lcd.clear();
Serial.begin(9600);
Wire.begin();
}
void loop()
{
Wire.requestFrom(8,1):
byte MasterRecieve = Wire read();
int potvalue = analogRead(A0);
byte MasterSend = map (potvalue, 0, 2023, 0, 127);
Wire.beginTransmission();
Wire.write (MasterSend);
Wire.endTransmission();
lcd.setCursor(0,0);
lcd.print(">>Master<<");
lcd.setCursor(0,1);
lcd.print("SlaveVal:");
lcd.print(MasterRecieve);
Serial.println("Master Recieved from Slave");
Serial.println(MasterRecieve);
delay(800);
}
SLAVE CODE: #include<Wire.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd(2,7,8,9,10,11);
byte SlaveRecieved = 0;
void setup()
{
lcd.begin(16,2):
lcd.setCursor(0,0);
lcd.print("skill lync");
lcd.setCursor(0,1);
lcd.print("I2C 2 ARDUINO");
delay(5000);
lcd.clear();
Serial.begin(9600);
Wire.begin(8);
Wire.onRecieve(receiveEvent);
Wire.onRequest(requestEvent);
}
void loop()
{
lcd.setCursor(0,0);
lcd.print(">>Slave<<");
lcd.setCursor(0,1);
lcd.print("MasterVal:");
lcd.print(SlaveRecieved);
Serial.println("Slave Recieved from Master");
Serial.println(SlaveRecieved);
delay(500);
lcd.clear();
}
void receiveEvent (int howMany)
{
SlaveReceived = Wire.read();
}
void requestEvent()
{
int potvalue = analogRead(A0);
byte SlaveSend = map(potvalue, 0, 1023, 0, 127);
Wire.write(SlaveSend);
}