46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
"""RTC Time"""
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import gc
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from time import *
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from machine import RTC
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import usocket as socket
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import ustruct as struct
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# NTP_DELTA (date(2000, 1, 1) - date(1900, 1, 1)).days * 24*60*60
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NTP_DELTA = 3155673600
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def ntptime(host="pool.ntp.org", utc=28800):
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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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try:
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s.settimeout(1)
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res = s.sendto(NTP_QUERY, addr)
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msg = s.recv(48)
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finally:
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del addr
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s.close()
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gc.collect()
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val = struct.unpack("!I", msg[40:44])[0]
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return gmtime(val - NTP_DELTA + utc)
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# There's currently no timezone support in MicroPython, and the RTC is set in UTC time.
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def settime(times):
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if isinstance(times, str):
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try:
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val = eval(times)
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if len(val) >= 6:
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times=(val[0], val[1], val[2], val[3], val[4], val[5], 0)
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else:
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raise ValueError("Clock information format error")
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except:
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raise ValueError("Clock information format error, use ',' to separate at least 6 numerical values")
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if type(times) in (tuple, list):
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if 6 <= len(times) <= 8:
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RTC().datetime((times[0], times[1], times[2], 0, times[3], times[4], times[5], 0))
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else:
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raise ValueError("Settime needs a tuple of length 6~8")
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def strtime():
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return '{0:04d}-{1:02d}-{2:02d} {3:02d}:{4:02d}:{5:02d}'.format(*localtime())
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