Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol
Aim:
Overview of the Project:
In this project implementing the Code for “Interfacing a 16*2 LCD with two Arduino’s (one for Master and one for Slave) using Inter-Integrated Circuit (I2C) communication protocol” by sending the message to LCD using I2C communication protocol and display the message on LCD screen.
Goals:
- Communication between Arduino and 16*2 LCD using I2C protocol.
- Displaying the message sent by Master and received by slave i.e. LCD display.
Key Highlights of the Project:
- Using the inter-integrated circuit communication protocol, transferring the data i.e. the message we want to display is sent to the LCD.
- Two Arduino’s connected to the LCD display and the communication is executed using I2C protocol between Arduino and the LDC display.
Deliverables of this project:
- Communication between the Arduino’s and LCD using I2C.
- The message passed from master to slave and displayed on the 16*2 LCD.
Expected Outcomes:
- Students will get the Knowledge of I2C communication Protocol and the Arduino.
- The Hardware connection of all components used in this project.
- Displaying the message sent by master (Arduino) and received by the slave (16*2 LCD display).
Circuit diagram
CODE
Master code:
#include <Wire.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd (2, 7, 8, 9, 10, 11);
void setup()
{
lcd.begin(16,2);
lcd.setCursor (0,0);
lcd.print("Welcome");
lcd.setCursor(0,1);
lcd.print ("I2C ARDUINO 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 MasterReceive = Wire.read();
int potvalue = analogRead(A0);
byte MasterSend = map(potvalue, 0, 1023, 0, 127);
Wire.beginTransmission (8);
Wire.write (MasterSend);
Wire.endTransmission();
lcd.clear();
lcd.setCursor(0,0);
lcd.print (">> the Master <<<");
lcd.setCursor (0,1);
lcd.print ("SlaveVal:");
lcd.print (MasterReceive);
Serial.println("Master Received From Slave");
Serial.println(MasterReceive);
delay(500);
}
Slave Code:
#include <Wire.h>
#include<LiquidCrystal.h>
LiquidCrystal lcd (2, 7, 8, 9, 10, 11);
void setup()
{
lcd.begin(16,2);
lcd.setCursor (0,0);
lcd.print("Welcome");
lcd.setCursor(0,1);
lcd.print ("I2C 2 ARDUINO");
delay(5000);
lcd.clear();
Serial.begin(9600);
Wire.begin(8);
Wire.onReceive(receiveEvent);
Wire.onRequest(requestEvent);
}
void loop(void)
{
lcd.setCursor(0,0);
lcd.print (">> the Slave <<<");
lcd.setCursor (0,1);
lcd.print ("MasterVal:");
Serial.println("Slave Received From Master");
delay(500);
lcd.clear();
}
void receiveEvent (int howMany)
{
int SlaveReceived=Wire.read();
lcd.print (SlaveReceived);
Serial.println(SlaveReceived);
}
void requestEvent()
{
int potvalue = analogRead(A0);
byte SlaveSend = map(potvalue, 0, 1023, 0, 127);
//Wire.beginTransmission (8);
Wire.write (SlaveSend);
}
Output
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