GPS and LTE issue

RE: GPS and LTE issue

Håkon Alseth — Thu, 26 Sep 2019 15:27:39 GMT

Hi,

Could you try updating to the very latest version of asset_tracker to see if this helps?

Kind regards,

Håkon

RE: GPS and LTE issue

Laurin Rossmeier — Wed, 25 Sep 2019 11:34:50 GMT

Hello,

i've tried waiting a couple of minutes without any effect.

I also don't get those "<dbg> nrf9160_gps.print_satellite_stats:" messages.

Do you have to enable those?

RE: GPS and LTE issue

Håkon Alseth — Fri, 20 Sep 2019 13:59:01 GMT

Hi,

If it has entered PSM mode successfully, and you do not have any on-going IP traffic, it should start printing info, like this:

+CEREG: 5,1,"76C1","0102DA04",7,,,"11100000","00001111"
OK
Starting GPS
Enabling PSM
PSM enabled
[00:02:05.143,432] <dbg> nrf9160_gps.enable_gps: GPS mode is enabled
[00:02:05.150,726] <dbg> nrf9160_gps.enable_gps: Functional mode: 1
[00:02:05.157,562] <dbg> nrf9160_gps.start: GPS socket created
[00:02:05.167,999] <dbg> nrf9160_gps.start: GPS operational
GPS started successfully.
Searching for satellites to get position fix. This may take several minutes.
The device will attempt to get a fix for 360 seconds, before the GPS is stopped.
GPS operation started
[00:02:30.932,312] <dbg> nrf9160_gps.print_satellite_stats: Tracking: 0 Using: 0 Unhealthy: 0
[00:02:30.941,528] <dbg> nrf9160_gps.print_satellite_stats: Seconds since last fix 150
.....

If you are not able to enter PSM, like if the mqtt thread is still sending/receiving data, it still stop like in your print outs.

Could you try waiting a minute or so before turning on the GPS?

Kind regards,

Håkon

RE: GPS and LTE issue

Laurin Rossmeier — Wed, 18 Sep 2019 20:07:03 GMT

It says that the device will attempt to get a fix for 360 seconds and after that time it stops.

I,ve tried the gps example in the exact same location and it got a fix in under 2 minutes. I even used the Thingy91 in an open area outside with no luck.

RE: GPS and LTE issue

Håkon Alseth — Wed, 18 Sep 2019 20:00:19 GMT

That is good! Did the GPS start tracking as well?

Kind regards,

Håkon

RE: GPS and LTE issue

Laurin Rossmeier — Wed, 18 Sep 2019 19:59:03 GMT

Well, my bad, the prevoius test wasnt in PSM

Now I tried it after i long pressed the button and after it said PSM enabled

Now the result is : +CEREG: 5,1,"C35F","0011E8CE",9,,,"11100000","00011111"

Thank you,

Laurin

RE: GPS and LTE issue

Håkon Alseth — Wed, 18 Sep 2019 19:35:04 GMT

Hi,

Unfortunately, 111 in the MSBits indicates that you are not going into PSM mode (111 = PSM disabled).

Kind regards,

Håkon

RE: GPS and LTE issue

Laurin Rossmeier — Wed, 18 Sep 2019 12:22:18 GMT

The Response is:

AT+CEREG?
+CEREG: 5,1,"C35F","0011E8CE",9,,,"11100000","11100000"

RE: GPS and LTE issue

Håkon Alseth — Wed, 18 Sep 2019 06:44:47 GMT

What does CEREG give back?

AT+CEREG=5
AT+CEREG?

RE: GPS and LTE issue

Laurin Rossmeier — Tue, 17 Sep 2019 18:20:41 GMT

I'm using a Telekom Austria nb iot Sim which works just fine in PSM, I just don't get any gps Data.

RE: GPS and LTE issue

Håkon Alseth — Tue, 10 Sep 2019 14:24:22 GMT

Hi,

What SIM card are you using? Our experience shows that some vendors do not allow PSM on roaming SIM cards. Could you check with AT client to verify if you enter PSM mode?

There's a "how to" on reading out PSM values here: https://devzone.nordicsemi.com/f/nordic-q-a/48200/correct-to-shutdown-modem-and-reconnect

Kind regards,

Håkon