PPK does not work

[leo93]

Hello everybody,

I've purchased 2 nRF6707 PPK and I used them successfully about 6 month ago with the Python software nRF6707 Power Profiler Kit 1_1_0.

Last week I tried to use them again, when I start the software it sends the error message: Initialization failed: could not reach calibration values. Check power, debugger connection and make sure the firmware is flashed on the PPK. (I use the device without the DK, so I set SW2 to External, SW4 to Reg and SW3 to Ext).

I also run falsh_ppk.py to ensure to have the correct firmware but it doesn't change anything.

Then, I noticed the nRF Connect PPK software, so I installed it but there is no serial port to choose.

How can I solve this?

Thank you

[Edvin]

Hello,

It may be that you have overwritten the firmware on the PPK, which actually is easy to do if you are not cautious. The hex file intended for the PPK is included in the PPK fw download, so you probably have it. Remove the DK (so that you are sure that you are programming the PPK), and flash that firmware. You may need to power cycle the PPK for it to start up.

I really recommend you to check out the new nRF Connect's Power Profiler application. It has made it significantly easier to work with the PPK, and it is much more stable than the old FW (the python scripts).

Best regards,

Edvin

[leo93]

Hello Edvin,
thank you for the reply.

When you say "the hex file intended for the PPK is included in the PPK fw download" do you mean the file ppk_110.hex that I can find in nRF6707 Power Profiler Kit - Software files 1_1_0? Beacuse I've already flashed it by running flash_ppk.py.

Thank you again, regards.

Leonardo

[Edvin]

Hello,

Yes. This is the one that I meant. But I really recommend that you try the nRF Connect version of the PPK software. It is much more bulletproof.

You can download nRF Connect for Desktop here.

After you have downloaded nRF Connect, click Add/remove apps, and then install "Power Profiler". Then connect your PPK to the computer and select it from the dropdown menu. You will be asked whether you want to program the device. Click yes.

Before selecting the board, connect it to a DK, and set the switches in positions:

Power select: DK
DUT: DK
SW3 (COM): DK

Also, make sure that you have cut SB9 on the DK to get the correct measurements (I guess you have already done this, and it is not related to the issues that you are currently seeing)

Best regards,

Edvin