Use supl_client_abort() A GPS SUPL nrf9160

RE: Use supl_client_abort() A GPS SUPL nrf9160

Håkon Alseth — Mon, 15 Nov 2021 14:42:44 GMT

Hi,

[quote user="haohv6"]Another issue, I use Agps with supl, it work fine but sometimes, Its position is wrong ( It may be up to thousands of kilometers).[/quote]

That almost sounds like a corrupted buffer/uart output?

Does it continuously report the wrong position?

[quote user="haohv6"]I use sdk 1.4.0 and fw 1.2.3, I don't use Low accurancy GPS mode.[/quote]

Have you tested on a newer ncs version? We're currently on v1.7.1.

Kind regards,

Håkon

RE: Use supl_client_abort() A GPS SUPL nrf9160

haohv6 — Mon, 15 Nov 2021 01:51:29 GMT

Sorry, i don't have log about that. I will try catch it.

Another issue, I use Agps with supl, it work fine but sometimes, Its position is wrong ( It may be up to thousands of kilometers).

I use sdk 1.4.0 and fw 1.2.3, I don't use Low accurancy GPS mode.

What should i do?

Thank you

RE: Use supl_client_abort() A GPS SUPL nrf9160

Håkon Alseth — Fri, 12 Nov 2021 14:14:28 GMT

Hi,

Do you wait until the network is available? Do you have a log showing the issue?

Kind regards,

Håkon

RE: Use supl_client_abort() A GPS SUPL nrf9160

haohv6 — Fri, 12 Nov 2021 13:30:11 GMT

I use it 5 minutes once.

I known that it can't connect LTE more 30 times per hour, are there any cases AT thread hanged?

RE: Use supl_client_abort() A GPS SUPL nrf9160

Håkon Alseth — Fri, 12 Nov 2021 13:09:59 GMT

Hi,

How often do you do this, ie CFUN=1/CFUN=4?

You are limited to 30 network attaches per hour as per GSMA guidelines (see here for documentation references). If this happens, the modem will wait until an hour has passed before you're able to attach to the network again.

Kind regards,

Håkon

RE: Use supl_client_abort() A GPS SUPL nrf9160

haohv6 — Fri, 12 Nov 2021 12:25:55 GMT

Hi.

I found that my connection thread hanged.
In that thread, I turned on AT + CFUN = 1 to connect to LTE and send message, after sent message, It disconnects and go to sleep mode with AT + CFUN = 4.

So, I think it have a problem at AT thread in at_cmd.c

RE: Use supl_client_abort() A GPS SUPL nrf9160

Håkon Alseth — Fri, 12 Nov 2021 12:07:22 GMT

[quote user="haohv6"]I found that in at_cmd.c, socket didn't have timeout. Are there any cases it hang forever? My custom board sometimes reboot because I set a watchdog timer with period 5 minutes.
I use AT+CFUN = 1 and AT +CFUN = 4 to connect LTE 5 minutes once[/quote]

Have you tried to disable the watchdog, and debugged the issue to see where it is stuck?

Kind regards,

Håkon

RE: Use supl_client_abort() A GPS SUPL nrf9160

haohv6 — Fri, 12 Nov 2021 10:20:29 GMT

Thank you, I understood.

I found that in at_cmd.c, socket didn't have timeout. Are there any cases it hang forever? My custom board sometimes reboot because I set a watchdog timer with period 5 minutes.
I use AT+CFUN = 1 and AT +CFUN = 4 to connect LTE 5 minutes once

RE: Use supl_client_abort() A GPS SUPL nrf9160

Håkon Alseth — Mon, 08 Nov 2021 13:06:15 GMT

Hi,

[quote user="haohv6"]

I use your gps sample but i don't find where to set low accuracy mode ( GNSS might use only three satellites to determine a fix).

How can I use it?

[/quote]

This is set in the gps configuration:

https://github.com/nrfconnect/sdk-nrf/blob/main/samples/nrf9160/agps/src/main.c#L110-L116

By adding the .accuracy = GPS_ACCURACY_LOW

[quote user="haohv6"]

In addition, my device uses the ATCFUN = 4 command to set the modem into sleep mode when inactive (for infrastructure reasons, my device cannot use PSM mode).

I noticed at + CFUN = 4 fast or slow respond depending on network conditions (sometimes a few seconds to minutes).

Is AT thread will wait until the socket reponds?

What is its timeout?

[/quote]

Minutes sounds quite long here. But it can take a couple of seconds for the link to gracefully shut down.

What are you doing prior to this sequence taking minutes to finish?

[quote user="haohv6"]are there any cases supl_client_session() functions wait forever and do not return results( how long timeout is it).?[/quote]

The session by default sets up a 1 second timeout:

https://github.com/nrfconnect/sdk-nrf/blob/v1.7.0/lib/agps/agps.c#L140-L150

Kind regards,

Håkon

RE: Use supl_client_abort() A GPS SUPL nrf9160

haohv6 — Sat, 06 Nov 2021 04:47:21 GMT

This documet (https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_nrf91_features.html#introduction) wrote that:

To improve this, Nordic Semiconductor has implemented the following methods for acquiring a fix in a shorter time:

A-GPS or P-GPS or a combination of both
Low accuracy mode

I use your gps sample but i don't find where to set low accuracy mode ( GNSS might use only three satellites to determine a fix).

How can I use it?

Thank you

RE: Use supl_client_abort() A GPS SUPL nrf9160

haohv6 — Sat, 06 Nov 2021 04:01:56 GMT

In addition, my device uses the ATCFUN = 4 command to set the modem into sleep mode when inactive (for infrastructure reasons, my device cannot use PSM mode).

I noticed at + CFUN = 4 fast or slow respond depending on network conditions (sometimes a few seconds to minutes).

Is AT thread will wait until the socket reponds?

What is its timeout?

Thank you

RE: Use supl_client_abort() A GPS SUPL nrf9160

haohv6 — Fri, 05 Nov 2021 15:18:49 GMT

are there any cases supl_client_session() functions wait forever and do not return results( how long timeout is it).?