Raspberry Pi Pico W/MicroPython connect to WiFi network and synchronize to NTP Time Server

Exercise run on Raspberry Pi Pico W with MicroPython v1.19.1, connect to WiFi network and synchronize to NTP Time Server.

mpyPicoW_toConnect_ntptime.py

"""
MicroPython/Pico W
connect to WiFi using network.WLAN
once connected, synchronize with NTP Time Server using ntptime

ref:
https://docs.micropython.org/en/latest/library/network.WLAN.html
"""
import time
import network
import machine
import ubinascii
import sys
import os
import ntptime

ssid = "ssid"
password = "password"

# Flash onboard LED three times to indicate program start
led = machine.Pin("LED", machine.Pin.OUT)
for l in range(3):
    led.off()
    time.sleep(0.3)
    led.on()
    time.sleep(0.3)
led.off()

print("=========================================================")
print(sys.implementation[0], os.uname()[3],
      "\nrun on", os.uname()[4])
print("=========================================================")
print()

wlan = network.WLAN(network.STA_IF)
wlan.active(True)
mac = ubinascii.hexlify(network.WLAN().config('mac'),':').decode()
print("MAC =", mac)

# WLAN.status([param]) Return the current status of the wireless connection.
# https://docs.micropython.org/en/latest/library/network.WLAN.html#network.WLAN.status
wlan_status_meaning = ((network.STAT_IDLE, "STAT_IDLE – no connection and no activity"),
                       (network.STAT_CONNECTING, "STAT_CONNECTING – connecting in progress,"),
                       (network.STAT_WRONG_PASSWORD, "STAT_WRONG_PASSWORD – failed due to incorrect password"),
                       (network.STAT_NO_AP_FOUND, "STAT_NO_AP_FOUND – failed because no access point replied"),
                       (network.STAT_CONNECT_FAIL, "STAT_CONNECT_FAIL – failed due to other problems"),
                       (network.STAT_GOT_IP, "STAT_GOT_IP – connection successful")
                       )

def decode_wlan_status(s):
    print(s, end=" : ");
    meaning = "unknown"
    for m in wlan_status_meaning:
        if s == m[0]:
            meaning = m[1]
            break
    print(meaning)
    
    if s == network.STAT_GOT_IP:
        led.on()
        return True
    else:
        led.off()
        return False

def toConnect():
    global wlan
    wlan.connect(ssid, password)
    print(ssid, password)
    
    # Wait for connect or fail
    max_wait = 10
    while max_wait > 0:
        #wlan.connect(ssid, password)
        wStatus = wlan.status()
        if decode_wlan_status(wStatus):
            break
        max_wait -= 1
        time.sleep(1)

while True:
    print("---------------------------");
    print("- connect to WiFi")
    
    toConnect()

    # Handle connection error
    wlan_status = wlan.status()
    if wlan_status != 3:
        print("network connection failed  ", wlan_status)
    else:
        break
        
print('connected')
status = wlan.ifconfig()
print( 'ip = ' + status[0] )
print()
print("- Synchronize to NTP Time Server using ntptime -")
print("Local time before synchronization：%s" %str(ntptime.utime.localtime()))
print("                 time.localtime()：%s" %str(time.localtime()))
print("                 time.time()：     %s" %str(time.time()))
ntptime.settime()
print("Local time after synchronization： %s without timezone adjust" %str(ntptime.utime.localtime()))
print("                 time.localtime()：%s" %str(time.localtime()))
print("                 time.time()：     %s" %str(time.time()))

TIMEZONE_OFFSET = UTC_OFFSET = 8 * 60 * 60 #GMT+8

print("With Time Zone adjust -")
#it will keep counting in REPL Shell
while True:
    print("=>", time.localtime(time.time() + TIMEZONE_OFFSET), end="\r")
    time.sleep(0.5)

print("\n~ bye ~\n")