How to measure the low power consumption of nRF9151-DK

[M_0077]

Hello
I am investigating the power consumption of the nRF9151-DK using PPK II.
The measurement settings are as follows.

 

・Connect PPK II's VOUT and DK's P22 VDD_nRF.
・Connect PPK II's GND and DK's P22 GND.
・Supply 3.7V current from PPK II to DK.

 

I would like to measure the power consumption of the following three states.

 

・eDRX
・PSM
・Active(ping)

 

When I first measured it, the power consumption during PSM was high at 562 μA, but after referencing the following site and building the Celler:UDP sample on the nRF9151-DK and programming it, the power consumption during PSM dropped to 2.99 μA.

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/test_and_optimize/optimizing/power_nrf91.html

 

However, AT commands can no longer be entered. In addition, it is not possible to check the power consumption of eDRX and Active states.

 

Is there a way to achieve either of the following two things?
・Rewrite the sample folder and transition nRF9151-DK to eDRX and Active.
・Enable AT command input.

 

Thank you in advance.

[Hakon]

Hello,

to achieve optimal power consumption, you need to disable uart. If you want to be able to disable uart dynamically you can use the Modem Shell sample. Using At cmds without uart is not possible, but you can send whatever commands you want, and then disable uart before measuring power.

[M_0077]

Sorry for my late reply.

Using the method you taught me, I was able to measure low power consumption.

Thank you very much for your cooperation.