The nrf91670dk Asset Tracker application lose connection / does not transmit data after some (variable) time

[Tom]

Hi,

I am running the Asset Tracker application from a fresh clone of the 0.4.0 nRF connect SDK. Using the supplied iBasis SIM.

It connects after booting, and I can monitor the messages on nrfcloud.

After some time (from 15 minutes to a few hours) there is no new data received / visible on nrfcloud, and the device is listed as "not connected" on the nrfcloud overview.

The status LED on the board (LED4) is constantly lit - thus it believes it is connected.

There is no indication in the 9160 console of a disconnect / error that can allow me to work around it (restart / reconnect).

The below screenshot shows an example where the connection failed after less than 15 minutes. Also note the irregular arrival of samples towards the end.

Does anybody else see this? Is this a known instability / problem?

Tom Kr.

[Markus Tacker (he/him)]

Hei,

this issue looks like a problem which was recently fixed in https://github.com/NordicPlayground/fw-nrfconnect-nrf/pull/803/commits/208c48d5d7eabb55dd210441b90746ad26c1229e

Can you try again with the latest master of https://github.com/NordicPlayground/fw-nrfconnect-nrf ?

[Tom]

Hi,

i tried checking out the master in a separate / new directory. 

When compiling I get an error: 

multiple definition of 'z_abort_timeout'

Am I using the wrong version of a repository? Or have I failed to configure the project correctly?

Best regards

Tom4075.log.txt

[Sigurd]

Hi,

Please test with the v1.0.0-rc2 tag. Also make sure that you are using the latest modem firmware.

[Tom]

It was the same problem. Solution was to build and flash spm separately before building and flashing asset_tracker *without* spm.

I am checking now if the stability has improved with 1.0.0-rc2

Tom