Sim800L time not updating to network time

Question

Im hoping someone could help me please. I am trying to retrieve time and date from the Sim800L and I am coming short. I have a Sim800L here and I am communicating with it successfully over the Arduino IDE. I have used the following AT commands as suggested online with the following results.

AT+CCLK?

+CCLK: "04/01/01,03:59:51+00"

OK

AT+CLTS=1

OK

AT&W

OK

AT+CLTS?

+CLTS: 1

OK

After restarting, the date and time however is not set to network time. The network is a national carrier and should be able to do this.

AT+CCLK?

+CCLK: "04/01/01,03:59:51+00"

OK

Any ideas? Thank you

yes. I am moving away from that library given the nature of my project. But all functions I have tried using in that library work, except the RTC functions. Not sure if I am calling the function in the right way though. is this correct: Sim800l.RTCtime(); ? — Misha
I have done the following checks: Ive taken the Sim800L simcard and put it into a phone. Then used the phone to check that auto-update-time on my phone works and it does. So the simcard is fine. I have also put my phone simcard into the Sim800L module and also could not get the correct time on the Sim800L module. — Misha
Can it be that the module works fine except for getting time? — Misha

Jacobo Córdova Jacobo Córdova · Accepted Answer · 2019-10-23T13:04:26

I found the same trouble. in this page embedded world i Found something that works for me. it is add the following instruction AT&W

Read current time (You can see that the time is not right):

AT+CCLK?

+CCLK: "04/01/01,00:14:12+22"

OK

Enable auto network time sync :

AT+CLTS=1

OK

Check if value is set :

AT+CLTS?

+CLTS: 1

OK

Save the setting to permanent memory so that module enables sync on restart also :

AT&W

OK

Restart the module and check time :

AT+CCLK?

+CCLK: "18/06/21,12:00:21+22"

OK

and it is all.

Sim800L time not updating to network time

2 Answers