/*attiny i2c lcd1
  gestion d'un LCD par un ATtiny85 via liaison I2C
  03/09/2021
  lien: https://github.com/RalphBacon/ATTiny85/blob/master/ATTiny85_I2C_LCD_Demo/ATTiny85_I2C_LCD_Demo.ino
        https://arduino.stackexchange.com/questions/29546/attiny85-i2c-lcd
        https://wokwi.com/projects/371042933135787009
test: ok 8MHz
  
        Brochage ATtiny85

          =|1  U  8|= VCC
          =|2     7|=2--> SCL
          =|3     6|=
      GND =|4     5|=0--> SDA
*/

#include <TinyWireM.h>                  // I2C Master lib for ATTinys which use USI
#include "LiquidCrystal_I2C.h"          // for LCD w/ GPIO MODIFIED for the ATtiny85
#define GPIO_ADDR     0x27              // (PCA8574A A0-A2 @5V) typ. A0-A3 Gnd 0x20 / 0x38 for A
LiquidCrystal_I2C lcd(GPIO_ADDR, 16, 2); // set address & 16 chars / 2 lines

void setup() {
  TinyWireM.begin();                    // initialize I2C lib
  lcd.init();                           // initialize the lcd
  lcd.backlight();                      // affiche un message sur le LCD.
  lcd.print("LCD I2C");
  lcd.setCursor(0, 1);                  // positionnement début ligne2
  lcd.print("avec ATtiny85");
  delay (2000);
}

void loop() {
}