App Inventor --> Bluetooth --> Arduino... Sending inappropriate data?


I am new to App Inventor and I got stuck with a problem when I try to send a simple TEXT FROM APP to ARDUINO via BLUETOOTH.

It does not send the text 'a' nor 'b', but rather it sends other symbol of which I don't know as shown below:

HERE IS THE CODE for ARDUINO (a very simple code as it is)

and here is for the APP INVENTOR

and the RESULT from ARUIDNO Serial Monitor:


I googled it for help, but couldn't find it so I write this to seriously seek for support.

Thank you so much for reading and helping :slight_smile:

Is the Serial Monitor in 9600?

Here examples:

Have you tried sending your 'a' and 'b' text using an off the shelf BlueTooth terminal program from the Play Store ?