pico_clock.py

from machine import Pin, Timer, I2C
from pico_i2c_lcd import I2cLcd
from network import WLAN, STA_IF
# from urequests import post
import gc
import errno
import utime

import ntptime

MOUNTAIN_OFFSET = -7 * 60 * 60
DAYLIGHT_OFFSET = 1 * 60 * 60

led = Pin("LED", Pin.OUT)

i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)

I2C_ADDR = i2c.scan()[0]
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)


# Add your own credentials here
ssid=' '
password=' '

led = Pin("LED", Pin.OUT)
led.low()

wlan = WLAN(STA_IF)
wlan.active(True)
# for network in wlan.scan():
#         print(str(network[0]))

def is_dst(t):
    return False

def MST(t):
    if is_dst(t):
        return utime.localtime(t + MOUNTAIN_OFFSET + DAYLIGHT_OFFSET)
    else:
        return utime.localtime(t + MOUNTAIN_OFFSET)
def connect():
    print("Connecting to network.")
    lcd.clear()
    lcd.putstr("Connecting...")
    led.low()
    wlan.connect(ssid, password)
    
    retry_wait = 0
    while not wlan.isconnected():
        print("Waiting for network... {}".format(retry_wait))
        retry_wait += 1
        if retry_wait == 10:
            break
        utime.sleep(1)
    
    if wlan.isconnected():
        lcd.clear()
        lcd.putstr("Connected!")
        utime.sleep(1)
        ntptime.settime()
        led.high() # Set LED to high if network is active
        lcd.clear()
        print(utime.localtime())

def main():
    if not wlan.isconnected():
        print("Disconnected! Reconnecting...")
        connect()
    else:
        now = MST(utime.time())
        now = list(map(lambda x: '{:0>{w}}'.format(str(x), w=2), now))
        
        lcd.move_to(0,0)
        lcd.putstr(str("{}-{}-{}\n{}:{}:{}").format(*now))
        
        # Sync (Busy Wait)
        while MST(utime.time())[5] == now[5]:
            utime.utime.sleep_ms(1)


while True:
    main()

# Run main on boot and repeat.
while True:
    try:
        main()
    except Exception as err:
        lcd.clear()
        print(str(err))
        lcd.putstr("Error: \n{}".format(str(err)))
        utime.sleep(0.5)
        print("Exception thrown.")