AGPS support error when using SUPL supporter in nRF9610 DK

[Ha Noi]

I had a problems with GNSS example using AGPS supportor  in nRF9610 DK. 

I use:

- Server hostname: supl.google.com 

- Port: 7276

- The version of supl library and nRF Connect SDK are the lastest version.

When I trying to "Connecting to LTE network", the terminal responses "CEREG: 4" and "Network connection attempt timed out". I found the error is EAGAIN (no more processes).

How to fix the error when using SUPL support?

And if I use "assistance not used" in Kconfig, the GPGAA response is incorrect, like the picture 2.

Pic1. Network connection attempt timed out

Pic2. GPGGA error

[Amanda Hsieh]

Hi,

- The version of supl library and nRF Connect SDK are the lastest version.

Do you mean NCS 2.2.0?

What is the MFW version?

Regards,
Amanda H.

[Ha Noi]

Thank you for answering

Amanda Hsieh said:

Do you mean NCS 2.2.0

Yes, It's exactly the 2.2.0 version 

Amanda Hsieh said:

What is the MFW version?

Is MFW has mean "modem firmware"? If it right, the version is mfw_nrf9610_1.3.3. I think this is also the lastest version for MFW.

Regards, Ha Noi

[Amanda Hsieh]

Hi, 

According to the GSMA, Vietnam only has NB-IoT coverage, while the sample is configured to use LTE-M by default. So the "network connection attempt timed out" is sort of expected. The device first tries to find an LTE-M network, and when it doesn't, it switches to NB-IoT, where it finds a network and attaches successfully. 

Since there's no LTE-M network available, you can change the network mode in the sample configuration to NB-IoT. This will speed up the connection establishment as the modem doesn't unnecessarily try to connect using LTE-M first. You can change the network mode to NB-IoT by setting CONFIG_LTE_NETWORK_MODE_NBIOT_GPS=y in the configuration.

The GPGGA is fine because GNSS doesn't have a fix yet.

-Amanda H.