nRF52840 DTM Can not communicate with device.

RE: nRF52840 DTM Can not communicate with device.

Jørgen Holmefjord — Tue, 31 Jan 2023 16:18:30 GMT

Are you able to operate the DTM firmware on your board using a serial terminal, by sending commands as described in the nRF Connect SDK DTM sample documentation?

RE: nRF52840 DTM Can not communicate with device.

lian sheng — Mon, 30 Jan 2023 09:42:44 GMT

Hi Jorgen,

The module UART is connected with USB to TTL.(HW flow control is not connected.)

I tried TX RX swap but same result.

In other applications, my module works fine (including UART).

Thanks,

Sheng

RE: nRF52840 DTM Can not communicate with device.

Jørgen Holmefjord — Mon, 30 Jan 2023 09:20:23 GMT

Hi,

How is the UART pins of the module connected to the PC where you are running nRF Connect DTM application? By default, our DKs have P0.06 and P0.08 connected to the interface MCU on the DK to create a virtual COM port to the nRF52 chip on the DK to run the DTM commands. If you do not have this connection, the DTM commands will not work.

Best regards,
Jørgen