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Power Profiler Kit - Keep getting "Failed to read PPK Metadata"

jpconstantineau

I recently obtained a PPK from Mouser and plugged it in my nRF52DK.  I use it to measure current of an external device.

When NRFConnect "connects", it works great.  However, for it to connect, I need to connect, disconnect about 10 times for it to get a reliable connection.

I tried replacing the USB cable and re-seating the PPK onto the nRF52DK.

I also re-flashed the firmware.  Unfortunately, nothing I have tried has improved the reliability of the connection between my PC and the PPK.

Do I have a defective PPK, nrf52DK or is this a software issue that Nordic needs to resolve in the firmware or application?

I would expect to connect successfully the first time, every time I need to use it and not have to try and re-try (and re-try (and re-try)) to make it work.

Here is the log I get:

I use nrf Connect 2.6.1.

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  • 0

    Hi.

    What steps did you do when you flashed the application and the PPK firmware?

    Did you follow the Quick Start guide?

    Best regards,

    Andreas

  • 0 in reply to AndreasF

    Here is what I did:

    Step 1 - skipped cutting traces on the DK because I measure the current of an external device (not the DK)

    Step 2 - installed the PPK on top of the DK

    Step 3 - Connected USB cable to DK

    Step 4 - Set the switches for the external DUT 

    Step 5 - Installed nRF Connect

    Step 5b - Installed PPK application in nrf Connect

    Step 6 - Started the PPK application

    Stap 7 - I connect to COM17 (that's the com port of my DK) 

    Step 8 - when prompted to flash the firmware, I accepted.

    The steps above follow pretty much the Quick start guide (Very little can go wrong; it's pretty simple)

    At anytime I need to re-use the PPK, I follow these steps:

    Step 1 - I plug in my device under test,

    Step 2 - I connect the computer to the DK

    Step 3 - I turn on the power switch on the DK.

    Step 4 - I start the PPK application

    Step 5 - I connect to COM17 using the top left dropdown

    Step 6 - IF it connects successfully, I start using the DK.

    Step 6 is usually where it fails.  On average, I need to connect/disconnect to com17 between 5 and 10 times before it will successfully connect.  Once connected and running for a few seconds, it rarely fails.

Reply
  • 0 in reply to AndreasF

    Here is what I did:

    Step 1 - skipped cutting traces on the DK because I measure the current of an external device (not the DK)

    Step 2 - installed the PPK on top of the DK

    Step 3 - Connected USB cable to DK

    Step 4 - Set the switches for the external DUT 

    Step 5 - Installed nRF Connect

    Step 5b - Installed PPK application in nrf Connect

    Step 6 - Started the PPK application

    Stap 7 - I connect to COM17 (that's the com port of my DK) 

    Step 8 - when prompted to flash the firmware, I accepted.

    The steps above follow pretty much the Quick start guide (Very little can go wrong; it's pretty simple)

    At anytime I need to re-use the PPK, I follow these steps:

    Step 1 - I plug in my device under test,

    Step 2 - I connect the computer to the DK

    Step 3 - I turn on the power switch on the DK.

    Step 4 - I start the PPK application

    Step 5 - I connect to COM17 using the top left dropdown

    Step 6 - IF it connects successfully, I start using the DK.

    Step 6 is usually where it fails.  On average, I need to connect/disconnect to com17 between 5 and 10 times before it will successfully connect.  Once connected and running for a few seconds, it rarely fails.

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