How to Measure Total Current Consumption of Thingy:91X Using PPK2 and current measurement board

[Youssef Elbattah]

Hi,

I'm currently working with the Thingy:91X and would like to measure the total current consumption of the entire board using the PPK2. I understand that the PCA64165 board  (current measurement board) provides current measurement shunts for individual rails (nRF53, nRF91, nRF70) via JP1, JP2, and JP3.

However, my goal is to get a global current profile.

My question is : Is it possible to use the PCA64165 in combination with the PPK2 to measure the total current (not just per rail)?

[dejans]

Hi,

You could try to measure VBAT directly at the battery (USB needs to be disconnected for this) or emulate full battery (without connecting real battery) with PPK2 by connecting VCC and GND to the output terminals of the PPK2. The voltage line can be cut and the PPK put in-between, since current meter needs to be wired in series.

Best regards,
Dejan