GPS on the Thingy91

RE: GPS on the Thingy91

Bjørn Kvaale — Mon, 28 Oct 2019 12:01:24 GMT

Great! Good to know. Thank you for the detailed response!

RE: GPS on the Thingy91

Terje K Wahl — Fri, 25 Oct 2019 07:58:17 GMT

TL;DR: Both create CID 1 and connect to network before you can activate the new context and deactivate context 0.

I have now solved my problem. If anyone would like to know the details they are in this thread:

https://devzone.nordicsemi.com/f/nordic-q-a/53364/unable-to-change-apn

RE: GPS on the Thingy91

Bjørn Kvaale — Tue, 22 Oct 2019 13:34:51 GMT

Did you remember to use the CGDCONT command first, like mentioned in our at commands pdf:

RE: GPS on the Thingy91

Terje K Wahl — Tue, 22 Oct 2019 08:52:47 GMT

Hi. Did you discover how to turn off Context 0? I have a similar problem with trying to deactivate context 0 and activating context 1, but trying e.g. "AT+CGACT=0,0" or "AT+CGACT=1,1" returns "ERROR".

RE: GPS on the Thingy91

Bjørn Kvaale — Tue, 03 Sep 2019 07:57:44 GMT

Very sorry for the delayed response. I wonder if something is wrong with the CGDCONT command. When I connected to Vodafone in England, I was told to run this command:

AT+CGDCONT=0,"IP","nb.inetd.gdsp"

It may be the same as the command you are running, but this could be worth a try. Otherwise, I would recommend taking a modem trace & then sending it to me. I'll let the Finland team know & we can take it from there.

RE: GPS on the Thingy91

Will Lizardo — Wed, 28 Aug 2019 00:38:12 GMT

Hi Bjorn,

UPDATE:

How can I turn off the Context 0 on the Thingy:91 FW?

I spoke with our local technical support from Vodafone, and he reinforced that I need to get the connection through the APN iot, not through Vodafone, but if I send the AT+CGACT=0,0 the application reboots.

I have managed to change the FW on the Thingy as well, so I have updated the 9160 FW and played with the AT Commands one.

RE: GPS on the Thingy91

Will Lizardo — Tue, 27 Aug 2019 23:06:00 GMT

Hi Bjorn,

Yes, CAT-M1 is supported by Vodafone, and you can see above that I had CAT-M1 connection, but I did not manage to get the GPS signal.

See below the outcome of the AT Commands that you asked:

RE: GPS on the Thingy91

Bjørn Kvaale — Tue, 27 Aug 2019 09:14:20 GMT

Update: It may also be a good idea to download the Thingy FW hex file from here if needed. The thingy91_at_client.hex file should work fine if you want to test AT commands on the Thingy:91. You will still need some sort of J-Link with a 10 pin SWD cable to program the Thingy.

RE: GPS on the Thingy91

Bjørn Kvaale — Tue, 27 Aug 2019 09:00:53 GMT

Yep, this is related to PSM. Does Vodafone support LTE-M1 in New Zealand? Do you need to give in any APN code for that SIM? The problem is that even though the log says PSM mode is enabled, it really is not most likely. Do you also have a 91 DK or only a Thingy:91? Do you have a J-Link that you could program the Thingy:91 with?

If you have a 91 DK, I would flash the DK with the at client example, then run the following commands:

AT+CEREG=5
AT+CPSMS=1,"","","10101010","00100001"
AT+CEREG?

From the Active Time & Periodic TAU output values, you should be able to see if PSM is enabled or not.

It may also be that Vodafone does not support the current PSM interval. If that is the case, once you find a PSM time that works (try a few different values), update the Thingy code to reflect this change.

From the documentation, I found this. Not sure if this applies to Vodafone, but I would maybe also double check with them on PSM values that are allowed.

As long as you are testing on a window sill or outside, you should not need to use an external antenna.