Using GPS in single shot mode seems to occasionally cause opened sockets to silently fail.

RE: Using GPS in single shot mode seems to occasionally cause opened sockets to silently fail.

JVantol — Tue, 15 Jun 2021 20:09:18 GMT

Didrik,

It turned out this was a red herring. Thanks so much for your advice and information though, it got me pointed in the right direction.

RE: Using GPS in single shot mode seems to occasionally cause opened sockets to silently fail.

Didrik Rokhaug — Thu, 10 Jun 2021 15:33:11 GMT

My suspicion is that the shared memory buffer between the modem and application core gets filled up.

This can happen e.g. if you don't read all the data that comes from the GPS, or if there is a memory leak.

RE: Using GPS in single shot mode seems to occasionally cause opened sockets to silently fail.

JVantol — Thu, 10 Jun 2021 13:05:46 GMT

Didrik,

I can do this, but I fear that since the problem is so sporadic, It might take a very long time to catch it with a log. I'll work on getting that done, but in the meantime, do you have any other ideas about what might be happening?

Josh

RE: Using GPS in single shot mode seems to occasionally cause opened sockets to silently fail.

Didrik Rokhaug — Thu, 10 Jun 2021 12:56:19 GMT

Hi,

Can you take a modem trace?

Also, could you enable debug logging in the modem_lib?

CONFIG_LOG=y
CONFIG_NRF_MODEM_LIB_DEBUG_ALLOC=y
CONFIG_NRF_MODEM_LIB_DEBUG_SHM_TX_ALLOC=y
CONFIG_NRF_MODEM_LIB_HEAP_DUMP_PERIODIC=y
CONFIG_NRF_MODEM_LIB_SHM_TX_DUMP_PERIODIC=y
CONFIG_NRF_MODEM_LIB_LOG_LEVEL_DBG=y

Best regards,

Didrik