The nRF Connect application can not search the device after I modified the Rx, Tx pin in my own PCB board.Can anyone tell me why?

[pocket_chan]

The nRF Connect application can not search the device after  I modified the Rx, Tx pin in my own PCB board.Can anyone tell me why?

The UART can run well,but the application can not search the device.

[ovrebekk]

Hi

Do you have hardware flow control (HWFC) enabled?

If so, can you try to enable internal pull ups on the flow control lines (CTS and RTS) ?

I have some times seen issues if these lines are floating when HWFC is enabled. 

Best regards
Torbjørn

[pocket_chan]

I didn't enable HWFC.、

Will the configuration of UART affect the initialization of softdevice?

[ovrebekk]

Hi

It should not, but if you get a lot of interrupts from the UART it could affect the processing of BLE events, which can affect the SoftDevice operation. 

How do you verify that the UART runs well? 

Are you able to debug the code and see if any SoftDevice or driver calls return an error code?

Best regards
Torbjørn