I2C 1602 LCD

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

// Set the LCD address to 0x27 for a 16 chars and 2 line display

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()

{

 // initialize the LCD

 lcd.begin();

 // Turn on the blacklight and print a message.

 lcd.backlight();

 lcd.print("Hello, World!");

}

void loop()

{

}

//I2C Liquid Crystal Demo Program

//include <Wire.h>. //Wire Library for I2C

#include <LiquidCrystal_I2C.h>

// Arduino Liquid Crystal I2C library

//Connect Vcc to 5V, GND to GND, SDA-->A4, SCL--> A5

// Set the LCD address to 0x27 for a 16 chars and 2 line display

LiquidCrystal_I2C lcd(0x27,16,2);

void setup()

{

 lcd.begin();  // initialize the LCD

 lcd.backlight();

 lcd.print("Hello, World!");  // Turn on the blacklight and print a message.

}

void loop(){

  int numberOne = random(10,20);

  int numberTwo = random(20,30);

  lcd.clear();

  lcd.setCursor(0,0); //line 1 of display

  lcd.print("Number One =");

  lcd.print(numberOne);

  lcd.setCursor(0,1); //line two of display

  lcd.print("Number Two = ");

  lcd.print(numberTwo);

  delay(1000);

}

#include <Wire.h>

#include <LiquidCrystal_I2C.h>// Liquid Crystal by Arduino, Adafruit

#include <DHT22.h> //DHT22 library by dvarrel

// Set the LCD address to 0x27 for a 16 chars and 2 line display

LiquidCrystal_I2C lcd(0x27, 16, 2);

//Connect to 5V, GND, SDA to A4 , SCL to A5

#define pinDATA 2

//Connect DHT22 to +5V, GND, and Data to Pin 2

DHT22 dht22(pinDATA); //define pin data

void setup()

{

 // Initialize the LCD

 lcd.begin();

 lcd.backlight();

 Serial.begin(9600); //1bit=10µs

 Serial.println("\ntest capteur DTH22");

}

void loop()

{

 float t = dht22.getTemperature();

 float h = dht22.getHumidity();

 if (dht22.getLastError() != dht22.OK) {

   Serial.print("last error :");

   Serial.println(dht22.getLastError());

 }

 Serial.print("h=");Serial.print(h,1);Serial.print("\t");

 Serial.print("t=");Serial.println(t,1);

 delay(2000); //Collecting period should be : >1.7 second

 lcd.clear();

 // Display humidity on line 0

 lcd.setCursor(0, 0);          // First row

 lcd.print("Humidity= ");

 lcd.print(h);

 // Display temperature on line 1

 lcd.setCursor(0, 1);          // Second row

 lcd.print("Temperature= ");

 lcd.print(t);

 delay(5000); // Wait 5 seconds

}