Failed to start the PPK.

[MikeLin]

Hello,

I use PPK to measure the power consumption.

but I always get :  Failed to start the PPK.

I have measured it last week and it is work.

and this is nrf connect log:

Fullscreen 2018-07-23T08_27_08.001Z-log.txt Download

2018-07-23T08:27:09.150Z INFO Application data folder: C:\Users\Lin\AppData\Roaming\nrfconnect\pc-nrfconnect-ppk
2018-07-23T08:27:09.274Z INFO App initialized
2018-07-23T08:27:09.300Z DEBUG App pc-nrfconnect-ppk v2.0.0 official
2018-07-23T08:27:09.300Z DEBUG App path: C:\Users\Lin\.nrfconnect-apps\node_modules\pc-nrfconnect-ppk
2018-07-23T08:27:09.300Z DEBUG nRFConnect 2.4.0 is supported by the app (^2.3.0)
2018-07-23T08:27:09.300Z DEBUG nRFConnect path: C:\Users\Lin\AppData\Local\Programs\nrfconnect\resources\app.asar
2018-07-23T08:27:09.300Z DEBUG HomeDir: C:\Users\Lin
2018-07-23T08:27:09.300Z DEBUG TmpDir: C:\Users\Lin\AppData\Local\Temp
2018-07-23T08:27:13.470Z INFO PPK opened
2018-07-23T08:27:13.471Z INFO Initializing the PPK
2018-07-23T08:27:14.176Z INFO Segger serial:  682116104
2018-07-23T08:27:14.176Z INFO Segger speed:  2000  kHz
2018-07-23T08:27:14.176Z INFO Segger version:  J-Link OB-SAM3U128-V2-NordicSemi compiled Jul  4 2018 16:22:02
2018-07-23T08:27:20.178Z ERROR Failed to open RTT channel
2018-07-23T08:27:20.179Z DEBUG RTT open timed out
2018-07-23T08:27:20.185Z INFO PPK closed
2018-07-23T08:27:25.182Z ERROR Failed to start the PPK.
2018-07-23T08:27:25.182Z DEBUG 

[Mttrinh]

Hi,

What have changed since last week when it was working? Is the PPK on top of a DK?

[TTN]

HI Mttrinh,

I'm Mike's colleague, the PPK is always on the top of the DK, the changes since last week maybe code flows and the Saadc functions we try to test.

[Mttrinh]

Have you tried with a different DK or PPK? 

[TTN]

Yes, we have tried different DK.
Still get the same error.

21:38:34.3040

Segger serial: 682331053

21:38:34.3040

Segger speed: 2000 kHz

21:38:34.3040

Segger version: J-Link OB-SAM3U128-V2-NordicSemi compiled Jul 4 2018 16:22:02

21:38:40.3050

Failed to open RTT channel

21:38:40.3070

PPK closed

21:38:45.3060

Failed to start the PPK.

[TTN]

Hi Mttrinh,

We follow the guide https://www.youtube.com/watch?v=JBKeHlOcO_g

The step before DK power on is same as the guide,

but we find that the led on the profile kit doesn't light up when DK power on.