Using nRF UART 2.0.. how does this app send info?

[jimbo]

Hello, I'm using the nrf UART 2.0 app with nrf51822 and I'm wondering how a line of characters is sent using this app. For example if I write 'abcdefg' does the BLE receive it at once or one by one? or does this depend on how the Bluetooth is programmed?

[Roger Clark]

The UART service uses a buffer of characters

When you do a write from your app, if you send 7 characters the nRF51 will get an event to handle those 7 characters when they arrive (all together)

If your app sends 1 character per Write, that's the way they will be received.

Note, there is limit of 20 characters per write (this can be changed but its not easy to do or supported app BLE API's)

[Sigurd]

If you are having problems with nRF UART 2.0, I recommend that you use the nRF Toolbox app and use the UART function there. The old UART 2.0 app is deprecated. If you want to take a look at the source code for the nRF Toolbox, you can find it here.

[jimbo]

hello thanks for the reply, when you say "when you write from YOUR app" by YOUR APP you mean the nRF UART right? not some app I made?

[Roger Clark]

Sorry, I misunderstood your question, I though you were referring to the Application code in the nRF5 device.

Your question asked if you can send characters one by or in a group, and both are possible, up to a group length of 20 characters.

But whether a IPhone or Amdroid app sends the characters individually or in a group depends on the App.

E.g RedbearLab have an app which sends characters in a group, but I think the Nordic examples send characters individually.

[jimbo]

yeah I was wondering if I write a long list of characters using the nRF UART, and hit send. Would the nRF UART 2.0 app send it all together or does it send it one by one really fast