This repository was archived by the owner on Sep 16, 2024. It is now read-only.
This repository was archived by the owner on Sep 16, 2024. It is now read-only.
RTC ntp time server not working using DNS on static ip #9
Description
When using a static IP address (instead of DHCP), the ntp_sync() doesn't work when using the FQDN 'pool.ntp.org' although it does work when DHCP is used or when an IP-address is used.
>>> import os
>>> os.uname()
(sysname='LoPy', nodename='LoPy', release='1.6.13.b1', version='v1.8.6-607-g9c8a0e9e on 2017-05-01', machine='LoPy with ESP32', lorawan='1.0.0')
>>> wlan.ifconfig()
('192.168.0.191', '255.255.255.0', '192.168.0.1', '213.46.228.196')
>>> import machine
>>> rtc = machine.RTC()
>>> rtc.ntp_sync('pool.ntp.org', 3600)
>>> rtc.now()
(1970, 1, 1, 0, 2, 21, 96633, None)
>>> rtc.ntp_sync('128.199.44.119', 3600)
>>> rtc.now()
(2017, 5, 16, 6, 3, 44, 126771, None)
Also (I am adding it here in this issue because it might be caused by the same problem), socket.getaddrinfo() often returns '0.0.0.0' while using a static IP-address:
>>> wlan.ifconfig() ('192.168.0.191', '255.255.255.0', '192.168.0.1', '213.46.228.196')
>>> socket.getaddrinfo('pool.ntp.org', 80)
[(2, 1, 0, '', ('0.0.0.0', 80))]
>>> socket.getaddrinfo('pool.ntp.org', 80)
[(2, 1, 0, '', ('122.175.14.128', 80))]
>>> socket.getaddrinfo('pool.ntp.org', 80)
[(2, 1, 0, '', ('16.88.252.63', 80))]
>>> socket.getaddrinfo('pool.ntp.org', 80)
[(2, 1, 0, '', ('0.0.0.0', 80))]
>>> socket.getaddrinfo('pool.ntp.org', 80)
[(2, 1, 0, '', ('0.0.0.0', 80))]
>>> socket.getaddrinfo('pool.ntp.org', 80)
[(2, 1, 0, '', ('0.0.0.0', 80))]
>>> socket.getaddrinfo('pool.ntp.org', 80)
[(2, 1, 0, '', ('80.87.252.63', 80))]