from machine import Pin
from esp32_gpio_lcd import GpioLcd
from utime import sleep_ms, ticks_ms

lcd = GpioLcd(rs_pin=Pin(4),
                  enable_pin=Pin(17),
                  d4_pin=Pin(5),
                  d5_pin=Pin(18),
                  d6_pin=Pin(21),
                  d7_pin=Pin(22),
                  num_lines=2, num_columns=20)

button1 = Pin(34, Pin.IN, Pin.PULL_UP)
button2 = Pin(35, Pin.IN, Pin.PULL_UP)

value = 0
while True:
    trangthai1 = button1.value()
    trangthai2 = button2.value()
    if trangthai1 == 1:
        value = value + 1
        sleep_ms(1000)
        lcd.clear()   
        lcd.putstr(str(value))
    if trangthai1 == 0 or trangthai2 == 0:
        value = value
    if trangthai2 == 1:
        value = value - 1
        sleep_ms(1000)
        lcd.clear()   
        lcd.putstr(str(value))