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

Ans) 16*2 LCD CODE :

Object :

* Firstly , We see how to interface LCD 16×2 to Arduino Uno, but there are very complicated circuits, so in this tutorial, I'll show you how to reduce circuitry by using I2C module which is very compact & easy to connection.

* Simply connect I2C module with LCD parallel & connect I2C modules 4 pins to Arduino. I2C module has 4 output pins which contains VCC, GND, SDA, SCL where 5V supply gives to I2C module through VCC & GND to GND of Arduino.

* SDA is a data pin & SCL is clock pin of I2C module. To interface LCD and I2C with Arduino we need Liquid Crystal I2C Library in Arduino IDE software.Circuit Diagram

2. DFRobot 12C 16*2 Arduino LCD Display Module

3. Gemper wires (generic) - 1

4. Bread Board (Generic) - 1

5. Soldering gun - 1

Master code:

1. #include<LiquidCrystal.h> //Library for LCD display function

2. LiquidCrystal lcd(12, 11, 5, 4, 3, 2); //Define LCD Module Pins (RS,EN,D4,D5,D6,D7)

3. int val1=A4;

4. int val2=A5;

5. void setup()

6. {

7. lccd.begin(16,2);

8. }

9. void loop()

10. {

11. lcd.setCursor(0,0); //Sets Cursor at line one of LCD

12. lcd.print(">> Master <<"); //Prints >> Master << at LCD

13. lcd.setCursor(0,1); //Sets Cursor at line two of LCD

14. lcd.Print("SlaveVal: 99"); //Prints SlaveVal: in LCD

15. LCD

16. delay(1000);

17. }

Slave Code:

1. #include <LiquidCrystal.h> //Library for LCD Display Function

2. LiquidCrystal lcd(12, 11, 5, 4, 3, 2); //Define LCD

3. Module Pins(RS,EN,D4,D5,D6,D7)

4. int val1=A4;

5. int val2=A5;

6. void setup()

7. {

8. lcd.begin(16,2);

9. }

10. void loop()

11. {

12. lcd.setCursor(0,0); //Sets Cursor at line one of LCD

13. lcd.print(">> Slave <<"); //Prints >> Slave << at LCD

14. lcd.setCursor?(0,1); // Sets Cursor ar line two of LCD

15. lcd.print("MasterVal: 100"); //Prints MasterVal: in LCD

16. delay(1000);

17. }