nRF9160 GPS - Satellites tracked but not used

RE: nRF9160 GPS - Satellites tracked but not used

Hakon — Tue, 30 Jun 2020 14:13:26 GMT

[quote user="thomas oggier"]But why, i could get response from +CPSMS with time value?[/quote]

It means that PSM hasn't been set by the network. +CPSMS just shows the requested parameters, and not what the parameters have been set to.

RE: nRF9160 GPS - Satellites tracked but not used

thomas oggier — Mon, 29 Jun 2020 11:32:19 GMT

What should be the parameter to check?

Because I get a lot of response of this command when I send it with nrfconnect.

I get this message, sp I think, the TAU is not set...

+CEREG: 2,"0BD6","01006C05",7,0,0,"11100000","11100000"

But why, i could get response from +CPSMS with time value?

RE: nRF9160 GPS - Satellites tracked but not used

Hakon — Mon, 29 Jun 2020 08:19:50 GMT

Use AT+CEREG to check what the parameters have been set to.

RE: nRF9160 GPS - Satellites tracked but not used

thomas oggier — Fri, 26 Jun 2020 13:28:19 GMT

When I send the cmd, I get a "ok"

And when I ask it with the lte link monitor:

AT+CPSMS?
+CPSMS: 1,,,"10101010","00100001"
OK

RE: nRF9160 GPS - Satellites tracked but not used

Hakon — Fri, 26 Jun 2020 13:24:46 GMT

Have you confirmed that it is able to enter PSM?

RE: nRF9160 GPS - Satellites tracked but not used

thomas oggier — Fri, 26 Jun 2020 13:16:10 GMT

So I had some informations

- AT+CFUN =1

- AT+CPSMS=1,,,"1010000001","00001111"

- AT%XSYSTEMMODE=1,0,1,0

The MQTT Receive subscribe topic, can send other, but I can't get GPS position from the modem.

Stop me if I'm wrong, but normaly, when the modem go to PSM mode, I should be able to get GPS data, but not in my case.

Another suggestion?

RE: nRF9160 GPS - Satellites tracked but not used

anicare-tero — Fri, 26 Jun 2020 08:35:44 GMT

[quote userid="91003" url="~/f/nordic-q-a/63018/nrf9160-gps---satellites-tracked-but-not-used/256948"]It try it, but the real line is "CONFIG_LTE_NETWORK_MODE_LTE_M_GPS=y"[/quote]

Yes, you are right on that. In the config it is CONFIG_LTE_NETWORK_MODE_LTE_M_GPS but if you are using the LTE Link Control and you want to set a system mode programmatically you might want to use LTE_LC_SYSTEM_MODE_LTEM_GPS.

[quote userid="91003" url="~/f/nordic-q-a/63018/nrf9160-gps---satellites-tracked-but-not-used/256948"]Someone know how to know when the lte or GPS are activate in PSM mode? can we have a call back when the mode change?[/quote]

My project is mainly based on Asset Tracker application so for me it's kind of difficult to say how you should do that because I think your code is a lot different comparing to mine.

RE: nRF9160 GPS - Satellites tracked but not used

thomas oggier — Thu, 25 Jun 2020 13:39:46 GMT

Hi Ziirou,

It try it, but the real line is "CONFIG_LTE_NETWORK_MODE_LTE_M_GPS=y"

but thanks.

Someone know how to know when the lte or GPS are activate in PSM mode? can we have a call back when the mode change?

RE: nRF9160 GPS - Satellites tracked but not used

anicare-tero — Thu, 25 Jun 2020 12:58:35 GMT

Hi Thomas,

[quote userid="91003" url="~/f/nordic-q-a/63018/nrf9160-gps---satellites-tracked-but-not-used/256919"]- but when I want to configure the mode to "LTE_LC_SYSTEM_MODE_LTE_M_GPS =y" -> the build failed because he didn't find it. [/quote]

It's LTE_LC_SYSTEM_MODE_LTEM_GPS and not LTE_LC_SYSTEM_MODE_LTE_M_GPS :) You had one _ mark too much there.

RE: nRF9160 GPS - Satellites tracked but not used

thomas oggier — Thu, 25 Jun 2020 12:52:28 GMT

I found the error:

- the function modem_init() of MQTT set the XSYSTEMMODE=1,0,0,0

- but when I want to configure the mode to "LTE_LC_SYSTEM_MODE_LTE_M_GPS =y" -> the build failed because he didn't find it.