Arduino LCD I2C simple use and direct write from serial monitor
Quick use of LCD i2c display with Arduino:
Wiring
If you have any problem with the libraries used here’s the link to download them:
Codes:
First code to test with:
//16*2 LCD Display Code
//SurtrTech channel
//Code for displaying a message on the screen for 2s then erase the screen for 2s
#include <Wire.h> //Libraries needed #include <LCD.h> #include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x27 //I2C adress, you should use the code to scan the adress first (0x27) here
#define BACKLIGHT_PIN 3 // Declaring LCD Pins
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin); void setup() { lcd.begin (16,2); lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE); lcd.setBacklight(HIGH); //Lighting backlight lcd.home (); }
void loop() {
lcd.setCursor(0,0); //Setting the position where you want to start writing the message (0,0) is top left
lcd.print("SurtrTech "); //Message to display
lcd.setCursor(10,1); //Start writing on the position (10,1)
lcd.print("Hello");
delay(2000); //Display time
lcd.clear(); //Clearing the screen
delay(2000); //Blank screen time
}
Seconde code to write something on the serial monitor and see it on the screen:
//16*2 LCD Display from serial monitor
//Modified from "YourDuino.com"
//SurtrTech channel (LEBOUIHA)
//Code for displaying a message from the serial monitor
#include <Wire.h> //Libraries needed
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x27 //I2C adress, you should use the code to scan the adress first (0x27) here
#define BACKLIGHT_PIN 3 // Declaring LCD Pins
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
void setup() {
Serial.begin(9600); //Serial used
lcd.begin (16,2);
lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
lcd.setBacklight(HIGH); //Lighting backlight
lcd.home ();
lcd.print("Hello");
delay(2000);
lcd.clear();
}
void loop()
{
// when characters arrive over the serial port...
if (Serial.available()) {
// wait a bit for the entire message to arrive
delay(100);
// clear the screen
lcd.clear();
// read all the available characters
while (Serial.available() > 0) {
// display each character to the LCD
lcd.write(Serial.read());
}
}
}
Categories
Yassine View All
Automation and Electrical Engineer, Electronics amateur trying to share my little projects.
can you write code please for sending lm35 data from arduino to raspberry pi via hc-05 bluetooth
Hello, unfortunately I don’t have it for the moment, maybe in the future.