encountering an issue while trying to program the Fanstel BT840F module using the nRF52840 DK

I have two boards:

  1. nRF52840 DK (which has a faulty buck converter, so I am powering it via USB).

  2. Fanstel BT840F board, which provides power to the Debug In connector of the nRF52840 DK.

When connecting the Debug In interface, both the nRF52840 DK and the BT840F board get programmed simultaneously. This is not an issue.

However, when I try to program an independent BT840F module (not the full board), it does not get programmed. My wiring is as follows:

Wiring Between nRF52840 DK and BT840F Module

nRF52840 DK BT840F Module
VDD VDD
GND GND
SWDIO SWDIO
SWCLK SWCLK

Despite this setup, the module is not responding to programming. Could you please assist in troubleshooting this issue?

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