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| 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. 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.
________________________________
@tonygo<https://github.com/tonygo> . Did you add this try: ___ except: block into your code?
image.png (view on web)<https://gist.github.com/user-attachments/assets/23f81f6c-3879-4983-b587-f71d0652619e>
(From my post/reaction: Jul 18, 2022)
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@tonygo . Did you add this try: ___ except: block into your code?
(From my post/reaction: Jul 18, 2022)
When I try this, I get an error on the line val=struct.unpack(...)
local variable referenced before assignment.
Presumably, msg is not set if the exception happens.
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@tonygo . Did you add this try: ___ except: block into your code?
(From my post/reaction: Jul 18, 2022)