Asset TrackerV2 - Active / Passive Mode

[Huba]

I am using the Asset TrackerV2 example on a v1.6.0 Thingy:91 SDK v2.4.2 with updated connectivity_bridge and latest Modem Firmware (2023-06-01).

My goal is to send data every 20s while the device is 'active'. When the accelerometer doesn't detect 'movement' for 60s the device should go to 'pasive (sleep)' mode and sends out data every 120s.

In order to achieve this i used the following settings:

The device sends updates every 120s while it stand on the table as intended.

However, i am unable to get the device into the 'active' mode, even while shaking the device. I played with the accThreshold in/act values, but without succes.

Any tips/ideas?

As a second point: I'm also having trouble getting a GNSS fix. I attempted using an external antenna and set CONFIG_MODEM_ANTENNA_GNSS_EXTERNAL=y in the prj.conf file, without succes.

Thanks in advance!

[Didrik Rokhaug]

Hi,

Please see the definition of the "active" and "passive" mode, as well as the other real-time configurations here: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.4.2/nrf/applications/asset_tracker_v2/doc/app_behavior.html#real-time-configurations

What you want, is for the device to be in "passive" mode all the time, with a "movement timeout" of 120s and a "movement resolution" of 20s.

As a second point: I'm also having trouble getting a GNSS fix. I attempted using an external antenna and set CONFIG_MODEM_ANTENNA_GNSS_EXTERNAL=y in the prj.conf file, without succes.

Are you using any LTE power saving features, such as PSM or eDRX?

Are you using A-GPS?

Best regards,

Didrik