rtc.synced() always returns False on FiPy 1.20.0.rc0 and 1.20.0.rc1

[akshayjames]

Hi

A test program to reproduce the issue (on FiPy) is:

import machine
import socket
from network import WLAN
import time
import os

rtc = machine.RTC()
internet_access = False

def check_internet():
    packet=b'$\x1a\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00'+\
    '\x03www\x06google\x03com\x00\x00\x01\x00\x01'
    for timeout in [1,5,10]:
        length = 32  # DNS query and response packet size
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s.settimeout(timeout)
        try:
            s.sendto(packet,('8.8.8.8',53))
        except:
            return False
        try:
            res = s.recv(length)
            if len(res) == length:
                print('Internet access TRUE')
                return True  # DNS response size OK
        except OSError:  # Timeout on read: no connectivity.
            return False
        finally:
            s.close()
    return False

print('FW:',os.uname()[2])
wlan = WLAN(mode=WLAN.STA, power_save=True)
wlan.connect('Skynet', auth=(3, '12345678'), timeout=5000)
while not wlan.isconnected():
    print('Connecting to WIFI')
    time.sleep(1)
print('WIFI connected')
time.sleep(1)

#Sync RTC via network
#Loop till RTC is not synced and till device is running.
i = 0
while not rtc.synced():
    print('RTC not synced')
    if not internet_access:
        print('Checking internet access')
        internet_access = check_internet()
    if i < 1 and internet_access:
        i = 10
        rtc.ntp_sync("pool.ntp.org")
        print('Current time:',time.gmtime())
        print('Synchronizing time from pool.ntp.org')
    time.sleep(1)
    i -= 1

print('RTC synced')

Output on 1.19.0.b5:

FW: 1.19.0.b5
Connecting to WIFI
Connecting to WIFI
Connecting to WIFI
Connecting to WIFI
Connecting to WIFI
WIFI connected
RTC not synced
Checking internet access
Internet access TRUE
Current time: (1970, 1, 1, 0, 0, 6, 3, 1)
Synchronizing time from pool.ntp.org
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC synced

It works!!!

But on 1.20.0.rc0,

FW: 1.20.0.rc0
Connecting to WIFI
Connecting to WIFI
Connecting to WIFI
Connecting to WIFI
WIFI connected
RTC not synced
Checking internet access
Internet access TRUE
Current time: (1970, 1, 1, 0, 0, 5, 3, 1)
Synchronizing time from pool.ntp.org
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
Current time: (2018, 12, 19, 4, 52, 4, 2, 353)
Synchronizing time from pool.ntp.org
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced

Even though the time is synced, rtc.synced() is still returning False.

Similar on 1.20.0.rc1:

FW: 1.20.0.rc1
Connecting to WIFI
Connecting to WIFI
WIFI connected
RTC not synced
Checking internet access
Internet access TRUE
Current time: (1970, 1, 1, 0, 0, 4, 3, 1)
Synchronizing time from pool.ntp.org
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
Current time: (2018, 12, 19, 4, 59, 41, 2, 353)
Synchronizing time from pool.ntp.org
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced
RTC not synced

[Paul Thornton]

@serafimsaudade glad to hear it :D

[serafimsaudade]

@paul-thornton Hi,

I'm testing the 1.20.0.rc4 and the rtc-synced is working ok.

[Paul Thornton]

Just to follow up on this. Yesterday 1.20.0.rc4 launched that should solve this issue. If you can reproduce it on this or later firmwares please let me know.

[randomrnti]

Same issue happening on my GPy. Further to this I've noticed that often when I upload to the pycom and run it won't get the current datetime and forever loop with the minimum datetime. However, when I press the button to reboot the pycom. It normally will pick up the latest datetime but synced() will still show false.

[throwaway]

@testos If you do not think your GPS issue is related to the synced flag for NTP/RTC I suggest that you create a separate thread on the forum (or report it on https://github.com/pycom/pycom-micropython-sigfox/issues).

[throwaway]

FWIW, also reported on GitHub: v1.20.0.rc2: machine.RTC.synced() always returns False (LoPy)

[testos]

Hello,

I know that's not necessarily related to RTC, but I'm having issue with the Fipy and the GPS using 1.20.0.rc0, 1.20.0.rc1, 1.20.0.rc2, 1.20.0.rc3 and L76GLNS.py, it just never get a fix connection. It was working well with 1.17.

the version : (sysname='FiPy', nodename='FiPy', release='1.20.0.rc3', version='v1.9.4-c5b0b1d on 2018-12-17', machine='FiPy with ESP32', lorawan='1.0.2', sigfox='1.0.1');

Thanks by advance.

[Paul Thornton]

@reidfo super usefull to know. Thanks.

[reidfo]

@paul-thornton Thanks. I can confirm the last version that ntp_sync worked in was 1.19.0.b4. b5 is where it broke for me.

[Paul Thornton]

thanks for the report I can reproduce this on 1.20rc3 (on a Gpy in this instance). and confirm it was working in 1.18. I've let the firmware team know.

[reidfo]

Broken in 1.20.0.rc2 and 1.20.0.rc3 as well.

[serafimsaudade]

The GPy have the same issue.