upgrade sdk 1.9.1 to 2.0.0

[Ofir_A]

Hi,

We upgrade our SLM app from sdk 1.9.1 to sdk 2.0.0 and now when we try to look for GPS there is a reduction at the voltage from 3.3 to 2

what are we missing? what changes affect the gpio voltage?

[flaik-wayne]

Do you have two GPIOs driving in different directions? This is probably the only way a GPIO could change voltage, unless it is an analog output pin of some kind? Which pin are you referring to?

[Ofir_A]

flaik-wayne said:

Do you have two GPIOs driving in different directions?

no

flaik-wayne said:

Which pin are you referring to?

COEX0

The input for Nordic GPIO is 3.3V but I get out of the Nordic is 2.1V

Can it be somehow related to configuration of the application? when I use SDK 1.9.1 all works perfect

[JONATHAN LL]

Hi,

Seems like the is something SW related here.

Are you also getting 2.1V on any other GPIO's or is it just the COEX0?

The COEX pin follows the voltage on the VDD_GPIO on the nRF9160.


Is this a custom board?

- If it is custom, could you also test your SW on a 9160DK, see if it behaves the same way?


Regards,
Jonathan