picow_ntp_client.py

import network
import socket
import time
import struct

from machine import Pin

NTP_DELTA = 2208988800
host = "pool.ntp.org"

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

ssid = 'A NETWORK'
password = 'A PASSWORD'

def set_time():
    NTP_QUERY = bytearray(48)
    NTP_QUERY[0] = 0x1B
    addr = socket.getaddrinfo(host, 123)[0][-1]
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    try:
        s.settimeout(1)
        res = s.sendto(NTP_QUERY, addr)
        msg = s.recv(48)
    finally:
        s.close()
    val = struct.unpack("!I", msg[40:44])[0]
    t = val - NTP_DELTA    
    tm = time.gmtime(t)
    machine.RTC().datetime((tm[0], tm[1], tm[2], tm[6] + 1, tm[3], tm[4], tm[5], 0))

wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(ssid, password)

max_wait = 10
while max_wait > 0:
    if wlan.status() < 0 or wlan.status() >= 3:
        break
    max_wait -= 1
    print('waiting for connection...')
    time.sleep(1)

if wlan.status() != 3:
    raise RuntimeError('network connection failed')
else:
    print('connected')
    status = wlan.ifconfig()
    print( 'ip = ' + status[0] )

led.on()
set_time()
print(time.localtime())
led.off()

Thank you for sharing this code.

I've been hitting a error if I I rerun the script. I cannot see why.

I've added a little at the end but do not see why that should cause the upset. I've updated to the current latest uf2s and run on several different boards.

Extra code:
`
print(" ")
year,mon,day,h,m,s,weekday,x = time.localtime()
now = str(h)+":"+str(m)+":"+str(s)
date = str(year)+" "+months[mon]+" "+str(year)
print(now)
print(date)

print(wd[weekday])
`

ERRORs below
`
MPY: soft reboot
connected
ip = 192.168.0.79
(2025, 3, 8, 13, 40, 38, 5, 67)

13:40:38
2025 Apr 2025
Sat

%Run -c $EDITOR_CONTENT

MPY: soft reboot
connected
ip = 192.168.0.79
Traceback (most recent call last):
File "", line 53, in
File "", line 25, in set_time
OSError: [Errno 110] ETIMEDOUT

`

I tried this change: s.settimeout(5) but it did not help.

@tonygo . Did you add this try: ___ except: block into your code?

(From my post/reaction: Jul 18, 2022)

Thank you. I will try that. I've written some new code of my own now that appears to be reliable. Tony Goodhew

…

________________________________ From: Paulus H.J. Schulinck ***@***.***> Sent: Tuesday, March 11, 2025 4:51 PM To: PaulskPt ***@***.***> Cc: Mention ***@***.***> Subject: Re: aallan/picow_ntp_client.py @PaulskPt commented on this gist.

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