5.4 Control an LCD1602 display

You can view values detected by the soil sensor on the Arduino IDE serial monitor.

We can add an LCD1602 display to show humidity values.

Description

The LCD1602 display is used for showing character strings.

Test Code

The LCD1602 displays character strings and values

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup()
{
  lcd.init();                      // initialize the lcd 
  lcd.init();
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(2,0);
  lcd.print("Hello, world!");
  lcd.setCursor(2,1);
  lcd.print("keyestudio");
}


void loop()
{
}

Test Result：

You can view the display show Hello World! on the first line and keyestudio on the second line.