GNSS/GPS TTFF with A-GNSS after upgrade from v2.4 to v2.5

[tpg]

Hi,

we have product which is close to the asset tracker v2 on the v2.4 which works fine. Now to upgrade to v2.5 we made the changes from agps to agnss. Everything works fine, but the unit is seeing nearly no satellites. With all logging on I can see that the A-GNSS data is moved into the modem/gps receiver. Return code is ok.

A-GPS data we get via MQTT, but we split almanac and ephemeris.

Looks like flashing v2.4 firmware, getting a GPS fix and the flashing the v2.5 firmware without powercycle so it looks like we still see some satellites and get a fix. After a powercycle we don't see satellites. So, I guess there is a problem with the A-GPS data, which is still cached after a reset, but not after a power cycle.

Are there other differences that are made here between 2.4 and 2.5? Any ideas how can I debug from here?

[tpg]

how could I send you the trace?

[Øyvind]

Just drag the file to the reply field, or go to insert and click on Image/video/file then click on "upload"

Kind regards,
Øyvind

[tpg]

Thanks for your help, I actually found the solution, and as usual we where looking in the wrong direction. Seems with 2.5 some code around the ADP5360 PMIC changed, so we aligned our board config to updated ADP5360 initialization of the asset tracker example. Seems, some entry in the device tree was needed.

In the end the GNSS LNA was simply not powered.