aqm0802 on uno r3

 //-------------------------------------------------------------------------------------------

// Tested Module    : ERC1602-4, EASTRISING TECHNOLOGY CO,.LTD.

// Drive IC         : ST7032

// INTERFACE        : I2C

// VDD              : 2.7V-5.5V

// Tested with MCU : Arduino Uno, Attiny85@1mhz(5.0V), Attiny85@8mhz(5.0V) and ESP8266(3.3V)

//-------------------------------------------------------------------------------------------

#include <LCD_ST7032.h> // library managerでzipでなくて成功した

LCD_ST7032 lcd;

void setup() {

  lcd.begin();

  lcd.setcontrast(24); //contrast value range is 0-63, try 25@5V or 50@3.3V as a starting value

}

void loop() {

  static int counter = 0;

  

  // Write a piece of text on the first line...

  lcd.setCursor(0, 0);  //LINE 1, ADDRESS 0

  lcd.print("HelloYou");

  // Write the counter on the second line...

  lcd.setCursor(1, 0);

  lcd.print(counter/10, DEC);

  lcd.write('.');

  lcd.print(counter%10, DEC);

  lcd.write(' ');

  delay(500);

  counter++;

}