RE: nrf9160 lte send data in gps continuous mode immediately

Didrik Rokhaug — Mon, 08 Feb 2021 13:46:37 GMT

Hi, and sorry for the very late answer.

How did you integrate GPS into the Azure sample?

Do you have any logs or a modem trace?

If you could get a log which is also showing AT+CSCON notifications, that would be very helpful.

[quote user=""]but it seems to be slower since it needs to reconnect every time I call activate_lte[/quote]

The GPS sample is made to test the GPS, and the GPS works best when LTE is disabled. The LTE stack has priority over the GPS stack, so if LTE is enabled, the GPS stack might not get enough time to run in order to download all the necessary data from the satellites.

This can be somewhat helped by AGPS, or by using eDRX or PSM to give the GPS more time to run.

[quote user=""]besides, after 8 to 15 calls it hangs at k_sem_take(&lte_ready, K_FOREVER); for 1 hour then the CERREG: 5 finnaly comes. Could this be that my provider blocks me since I connect and disconenct so often?[/quote]

Yes, e.g. there is a limit of only 30 connection requests per hour.

[quote user=""]I tried to also set PSM mode by calling t_cmd_write("AT+CPSMS=1,,,\"00000110\",\"00000001\"", NULL, 0, NULL); in activate_lte, but now when i leave LTE and GPS activated it just crashes when sending the position through LTE.[/quote]

That sounds strange. Do you have any logs to indicate where the crash occurs?

Also, a better way would be to set CONFIG_LTE_PSM_REQ_RAT and CONFIG_LTE_PSM_REQ_RPTAU.

Best regards,

Didrik