Send and receive text data

[bdoan]

I am running a copy of the Peripheral_UART application on a nRF52 Dev Board (Segger PCA10040)

The device connects to iOS apps (such as nRF Connect and nRF Toolbox.

I can send text data from the toolbox app to the UART RX port (USB com port) of the device but I see no method for sending text from the device to the iOS app.

With a 3rd part app, ESP32 BLE Terminal, I can also connect and send data from iOS to the device but I cannot send data back from the device using the USB com port terminal program.

I need to be able to send and receive text data between the UART port of the device and the iOS app.

Also, the only properties that I see advertised by the device are :
Notify                                    (6E400003-B5A3-F393-E0A9-E50E24DCCA9E)  
and WriteWithoutResponse (6E400002-B5A3-F393-E0A9-E50E24DCCA9E)

Please advise

[Sigurd]

Hi!

but I cannot send data back from the device using the USB com port terminal program.

That should have worked fine. What terminal are you using ? Make sure to enable new-line and/or carriage return in the terminal program.

[bdoan]

I am using Microsoft Terminal.exe

Are you saying that the periferal_UART application requires a cr-lf at the end of text in order to pass a message?

[Sigurd]

bdoan said:

Are you saying that the periferal_UART application requires a cr-lf at the end of text in order to pass a message?

At least on the main branch, this is now the behavior. You could also add this commit, and see if works better for you: https://github.com/nrfconnect/sdk-nrf/pull/14392/commits/a8969e9e105301f3a25c5498c13d394107b9ff3c

also make sure to enable the UART TX Characteristics notification in iOS nRF Connect for mobile app:

You could also try the nRF Connect Serial Terminal or Putty as terminals, ref https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/test_and_optimize.html#test-and-optimize