RE: Power Profiler Kit (PPK) - modify to enable higher power measurements

Lucas G. — Thu, 07 Nov 2019 19:31:20 GMT

Thanks! I'll try that and let you know how it goes.

RE: Power Profiler Kit (PPK) - modify to enable higher power measurements

wlgrd — Tue, 05 Nov 2019 12:14:37 GMT

Hi Lucas. Nice to hear that you have had good use of the PPK.

You can have a look at this ppk api (set_user_resistors) to see how you can change the user-defined resistor values. These values are exposed in the initial metadata coming from the PPK as you connect, and you can use these to calculate the new values.

Your mileage may vary though, since the ratio between resistors are carefully selected together with the switching circuitries reference voltages, meaning that you may end up with rapid switching at times. I would advise trying to e.g triple all the values at the same time.

The feature of changing the initial resistor values has not been exposed since users may forever break the factory stored EEPROM values. But if you want to, you should use the same syntax as the github-link I provided, with command byte 0x10. Please be very aware that this will overwrite the factory defaults, and is not able to restore it unless you write it correctly. The user resistors may still be used though.

We can unfortunately not open-source the firmware at the moment.