[error] [ Client] - Encountered error -102: Command read_device_info executed for 132 milliseconds with result -102

RE: [error] [ Client] - Encountered error -102: Command read_device_info executed for 132 milliseconds with result -102

JONATHAN LL — Tue, 19 Aug 2025 12:02:00 GMT

Do you have a pin\LED on your custom board that you can toggle?

Its often best to start simple with custom HW to make sure things are configured correctly.

You can also use the DK as a UART\Serial adapter.

Also are you building for the custom board or ar you using the board file of the DK when you make the project?
Does it run ok on the DK if you test the app there?

Regards,
Jonathan

RE: [error] [ Client] - Encountered error -102: Command read_device_info executed for 132 milliseconds with result -102

huy.tran — Tue, 19 Aug 2025 11:22:28 GMT

Hi Jonathan !

I'm having trouble with DEBUG and it doesn't show LOG on RTT after i flash successfully using P20 nRF52840-DK

Can you help me fix it?
Thanks !

nRF52840DK (P20) ---> Custom board
-------------------------------------------------
VDD_nRF(P20) → SWD_SEL(P20)
VDD_nRF(P20) → Vin custom board
SWDIO/CLK → SWDIO/CLK custom board
GND → GND custom boardCustom board with separate power supply

RE: [error] [ Client] - Encountered error -102: Command read_device_info executed for 132 milliseconds with result -102

JONATHAN LL — Tue, 19 Aug 2025 11:08:32 GMT

Make sure the voltage on the Custom board is the same as the voltage on the programmer DK, a mismatch in the voltage here can cause this issue.

So make sure that the two boards operate at the same voltage.

Regards,
Jonathan

RE: [error] [ Client] - Encountered error -102: Command read_device_info executed for 132 milliseconds with result -102

huy.tran — Fri, 15 Aug 2025 15:42:06 GMT

Hi Jonathan !
Pin connection diagram from P19 nrf52840 via DEBUG board to customboard J2 :

Pin 1 VREF (P19) -> pin1 Vin->Vin=2.8V (J2)
Pin 2: SWDIO (P19) -> pin2 -> pin2: SWDIO (J2)
Pin 4: SWDCLK (P19) -> pin3 -> pin4: SWCLK (J2)
Pin5: GND (P19) -> pin 6 -> Pin 5: GND (J2)
Pin 10: RESET (P19) -> pin4 -> pin3: NRST_nRF (J2)

My custom board uses nrf52840 chip and has J2 port to communicate with nrf52840 board

P19(nRF52840-DK) -> Board DEBUG -> J2 (Custom board)
and I use TC2030-MCP-NL wire to communicate from DEBUG board to my Custom board

RE: [error] [ Client] - Encountered error -102: Command read_device_info executed for 132 milliseconds with result -102

JONATHAN LL — Fri, 15 Aug 2025 12:44:46 GMT

Can you share som diagram or image of your setup `?

Also have you had the custom board review?

Regards,
Jonathan