kopia lustrzana https://github.com/peterhinch/micropython-samples
36 wiersze
1.3 KiB
Python
36 wiersze
1.3 KiB
Python
# Adapted from official ntptime by Peter Hinch July 2022
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# The main aim is portability:
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# Detects host device's epoch and returns time relative to that.
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# Basic approach to local time: add offset in hours relative to UTC.
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# Timeouts return a time of 0. These happen: caller should check for this.
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# Replace socket timeout with select.poll as per docs:
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# http://docs.micropython.org/en/latest/library/socket.html#socket.socket.settimeout
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import socket
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import struct
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import select
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from time import gmtime
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# (date(2000, 1, 1) - date(1900, 1, 1)).days * 24*60*60
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# (date(1970, 1, 1) - date(1900, 1, 1)).days * 24*60*60
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NTP_DELTA = 3155673600 if gmtime(0)[0] == 2000 else 2208988800
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# The NTP host can be configured at runtime by doing: ntptime.host = 'myhost.org'
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host = "pool.ntp.org"
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def time(hrs_offset=0): # Local time offset in hrs relative to UTC
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NTP_QUERY = bytearray(48)
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NTP_QUERY[0] = 0x1B
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addr = socket.getaddrinfo(host, 123)[0][-1]
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s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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poller = select.poll()
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poller.register(s, select.POLLIN)
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s.sendto(NTP_QUERY, addr)
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if poller.poll(1000): # time in milliseconds
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msg = s.recv(48)
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s.close()
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val = struct.unpack("!I", msg[40:44])[0]
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return val - NTP_DELTA + hrs_offset * 3600
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s.close() # Timeout occurred
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return 0
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