Tried Bluno Basic Demo with a Bluno Bee, does not receive Data

Hello,

I recently bought the DFRobot IO Expansion & Motor Driver Shield with a Bluno Bee (https://www.dfrobot.com/product-1073.html). I am a newbie, so I followed the Bluno tutorial (https://www.dfrobot.com/wiki/index.php/ ... KU:DFR0267).

I uploaded the latest firmware for BLE-link (1.97), downloaded the APK (BlunoBasicDemo.apk) and upload the sketch (blunoBasicDemo.ino) in my arduino Uno.

In the App, I can "Scan" the devices and connect to the BLE-link. I see that it is "Connected" and when I try to send data I don't have any response...
AT commands works, the baud rate is 115200.

Have I skipped a step ? The app should respond with the same data I sent, right ?

Thank you for your help !