Hi everyone!
I've been using the Power Profiler Kit quite successfully for the past few months. Instead of using the UI, I designed a python app to communicate with it (through pynrfjprog and JLink RTT) and perform long-term power consumption measurements.
It's been working super well and reliably to perform automated QA tests on a NRF52832-based custom board.
I now want to perform the same kind of tests on an NRF52840-based custom board that features a cellular modem. The issue is that the peak current consumption of that board is >200mA because of the cellular modem.
It's higher than the max current supported by the PPK (~70mA).
Would you mind sharing a way to increase that max current by reworking the PPK and modifying the current measurement shunt resistor(s)?
The hardware modification is easy, but a PPK firmware modification would also most likely be needed, so that the PPK reports the right current. Is there a way to change the config of the PPK firmware through a JLink RTT command, or by writing shunt resistor values to the flash or UICR? Would you mind open-sourcing the PPK firmware so that people could customize it if needed?
Thanks!
Lucas