import lcd8bit as lcd
from utime import sleep
sleep(0.001)
a=10
lcd.cmd_wrt(0x80+5)
lcd.str_wrt("hello "+str(a)+" hiii")
lcd.cmd_wrt(0xc0+3)
lcd.str_wrt("test")
sleep(3)
lcd.cmd_wrt(0x01)
while 1:
    for i in range(100):
        lcd.cmd_wrt(0xc6)
        lcd.str_wrt("cnt:"+str(lcd.zfl1(i,3)))
        sleep(0.3)


main.py

diagram.json

from machine import Pin
from utime import sleep

rs=Pin(28,Pin.OUT)
e=Pin(27,Pin.OUT)
dataline=(Pin(26,Pin.OUT),Pin(22,Pin.OUT),Pin(21,Pin.OUT),
          Pin(20,Pin.OUT),Pin(19,Pin.OUT),Pin(18,Pin.OUT),
          Pin(17,Pin.OUT),Pin(16,Pin.OUT))

def lcd_wrt(data):
    for i in range(8):
        dataline[i].value((data&(0x01<<i))>>i)
    e.value(0)
    sleep(0.001)
    e.value(1)
    sleep(0.001)
    e.value(0)
    sleep(0.001)

def cmd_wrt(data):
    rs.value(0)
    lcd_wrt(data)
    sleep(0.001)

def data_wrt(data):
    rs.value(1)
    lcd_wrt(data)

def start_lcd():
    cmd_wrt(0x38)
    sleep(0.01)
    cmd_wrt(0x0c)
    sleep(0.01)
    cmd_wrt(0x01)
    sleep(0.01)
    cmd_wrt(0x80)
    sleep(0.01)

def str_wrt(ayat):
    for i in ayat:
        data_wrt(ord(i))

def zfl(s, width):
    return '{:0>{w}}'.format(s, w=width)

def zfl1(s, width):
    return '{: >{w}}'.format(s, w=width)

start_lcd()

    

