Using NUS on development board, not sending data to central

[SidPrice]

I have built and flashed the NUS example in the SDK and using nRFConnect on my phone I can send data to the dev board. However, I am unable to receive data at nRFConnect sent to the dev board by the attached terminal. I have seen data arrive sometimes but after a long time, maybe minutes. Is there something I need to do in addition to building the NUS example?

Sid

[Hung Bui]

Hi Sid Price, 

I would suggest to use the nRF Sniffer to check if the phone actually sending any data to the nRF5 chip. 

Have you verified that the UART connection is working properly ? I would suggest to try put a break point in bt_receive_cb() function to see if the callback is called when you send something from the phone. 

Have you made any modification to the peripheral_uart sample ? 
Have you tried to test with other sample , for example peripheral_lbs ? 

[SidPrice]

Hello Hung Bui (hungbui), thank you for the reply.

I am using nRF Sniffer, I see data going from my phone to the dev. board, there is no data coming from the dev board.

Yes the UART connection is working, it is a virtual comm port via the JLInk OB.

No modifications have been made to the sample.

I have not tried any other sample.

Sid

[Hung Bui]

Hi Sid, 

What did you mean by "there is no data coming from the dev board" ? 
Please upload the sniffer trace. 

As I suggested, please step into the code and debug. 
If you see the write command from the phone to the dev board, a write callback should arrive in bt_receive_cb()

[SidPrice]

Hi,

Hi, thanks for your help, I did not make any change but now the NUS example seems to be working.

Sid