iOS NRF Connect App cannot show TX and RX characteristics when connected to nrf52840-DKflashed with ble_app_uart

[libowu]

Hi Devzone,

I am a beginner in BLE development. I have a nrf52840-dk and want to test the ble-app-uart example in SDK-16.0.0.

I firstly use NRF connect desktop programmer to erase all. Then I open \...\nRF5_SDK_16.0.0_98a08e2\examples\ble_peripheral\ble_app_uart\pca10056\s140\arm5_no_packs with Keil uVision 5. I firstly program the softdevice flash_s140_nrf52_7.0.1_softdevice, then download the compiled UART application. Everything is straight forward. 

But when I open the NRF Connect App on my iPhone and connect to the DK, I could not find the TX and RX characteristics in the UART service. Thus I cannot communicate with the DK by writing string in the serial channel. 

[Simonr]

Hi

You should be able to communicate with the device by using the Nordic UART Service you can see at the top of the services list in your nRFConnect app. Please read up on how the Nordic UART Service should be handled here.

Best regards,

Simon

[libowu]

Thank you for your reply! It's strange that the board and app work fine today!

[Simonr]

Okay, glad you've got it working. Feel free to hit me up if you run into this issue again!

Best regards,

Simon