Week 8- Journal

// here i define the three colors of led,  each color with certain pin 

char incomingdata = '0';   

#define LEDr 3

#define LEDg 5

#define LEDb 6

// i upload the code for lcd 

#include <LCD-I2C.h>

#include <Wire.h>

LCD_I2C lcd(0x27, 16, 2); // Default address of most PCF8574 modules, change according

void setup() {

  // put your setup code here, to run once:

 Wire.begin();

    lcd.begin(&Wire);

    lcd.display();

    lcd.backlight();

// i define the les colors as outputs and start the serial print with certain value

Serial.begin(9600);

pinMode(LEDr, OUTPUT);

pinMode(LEDg, OUTPUT);

pinMode(LEDb, OUTPUT);

}

void loop() {

  // put your main code here, to run repeatedly:

// if i press 1 on the mobile app , the green color will switch on and the word color green will appear on the lcd

while (Serial.available()==0);

incomingdata = Serial.read();

Serial.println(incomingdata);

 if (incomingdata =='1'){

lcd.print("     COLOR"); // You can make spaces using well... spaces

    lcd.setCursor(5, 1); // Or setting the cursor in the desired position.

    lcd.print("GERRN!");

    delay(500);

// turn the red light on

  digitalWrite (LEDr , HIGH);

  digitalWrite (LEDg ,LOW);

  digitalWrite (LEDb , LOW);

// if i press 0 on the mobile app , the led will switch off and the word bye bye will appear on the lcd

 }else  if (incomingdata =='0'){

  digitalWrite (LEDr , LOW);

  digitalWrite (LEDg , LOW);

  digitalWrite (LEDb , LOW);

lcd.print("     BYE"); // You can make spaces using well... spaces

lcd.setCursor(5, 1); // Or setting the cursor in the desired position.

    lcd.print("BYE");

    delay(500);

}

// if i press 2 on the mobile app , the red color will switch on and the word color RED will appear on the lcd

else  if (incomingdata =='2'){

  digitalWrite (LEDr , LOW);

  digitalWrite (LEDg , HIGH);

  digitalWrite (LEDb , LOW);

lcd.print("     COLOR"); // You can make spaces using well... spaces

    lcd.setCursor(5, 1); // Or setting the cursor in the desired position.

    lcd.print("RED");

    delay(500);

}

// if i press 3 on the mobile app , the blue color will switch on and the word color blue will appear on the lcd

else  if (incomingdata =='3'){

  digitalWrite (LEDr , LOW);

  digitalWrite (LEDg ,LOW );

  digitalWrite (LEDb , HIGH);

  lcd.print("     COLOR"); // You can make spaces using well... spaces

    lcd.setCursor(5, 1); // Or setting the cursor in the desired position.

    lcd.print("BLUE!");

    delay(500);

}

// if i press 4 on the mobile app , the white color will switch on and the word color white will appear on the lcd

else  if (incomingdata =='4'){

  digitalWrite (LEDr , HIGH);

  digitalWrite (LEDg ,HIGH );

  digitalWrite (LEDb , HIGH);

  lcd.print("     COLOR"); // You can make spaces using well... spaces

    lcd.setCursor(5, 1); // Or setting the cursor in the desired position.

    lcd.print("WHITE!");

    delay(500);

}

if i press any other button this message (invalid data) will apear on the lcd

else {

  Serial.println(" invalid data");

}

}