USBD and BLE Echo

[lelisele]

I'm using  \nRF5_SDK_15.3.0_xxxxx\examples\peripheral\usbd_ble_uart example to use two communication links. Missing echo on the USB virtual COM is a small frustration. I've tried to implement this service without success. The problem is to send back the last character but this interface is based on the whole chain. Thanks for help.  

[Sigurd]

Hi,

Could explain this some more? When you send data from the PC terminal, to the nRF52840, you want the nRF52840 to echo back the data it received?

[lelisele]

Thanks for your answer, Currently the sequence is: I hit message on the ptty via USB Virtual COM without any echo to verify what shall be sent and the message is "visible" only after CR and ONLY on the Android. That is common using for terminal. On the Android it is OK.We can observe our message before sending. The solution could be:  each time when application receive one character make echo and sent it back.    

[Sigurd]

lelisele said:

The solution could be:  each time when application receive one character make echo and sent it back.    

 Yes, you could send it back to the terminal with app_usbd_cdc_acm_write().

Alternatively, just enable local echo in Putty: