Read text from microbit whith mit app

Hello. I'm new here and beginner with mit app. I'm trying to communicate between microbit and mit app. I'm able to send text to microbit in order to make actions like turning on or off light but I can't send text from the microbit to mit app. If someone could help me.
microbit-Bluetooth_Boutons (1).hex (1.3 MB)
BTstarter.aia (304.5 KB)

Welcome

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https://community.appinventor.mit.edu/search?context=topic&context_id=166707&q=Microbit&skip_context=true

Taifun

What Android version do you use. That microbit extension you use is only for Android version 11 or lower if I read it properly. There are updates. Read @Ghica's description thoroughly. A little search can make wonders.
https://community.appinventor.mit.edu/t/app-inventor-micro-bit-and-uart/44876

If you want more help, then attach your .aia and the .hex (for the microbit).

Thanks for your answer
I use android 16. I had found your link but error message when the bbc is connected

.aia and hex are attached in my first message

It xas a problem of version of the BLE extension. I can continue to work. Thanks a lot