When We Try To connect Bluetooth Device using Bluetooth Client . until getting successful connection app freezes. and We will be prompted wait and close by android. So i Make this extension from some combination of sources. and it worked for me. If any One need it you can test and use in your project.
No, absolutely not. I never had your "error message" while connecting to a Bluetooth device. You or others would have to answer this, but are there also drawbacks using an asynchronous method to connect to an bluetooth device?
At the moment I and others are testing an extension MicroBlocks Test/Demo App that makes it possible to connect to a microcontroller like micro:bit, calliope mini, ESP32, Raspberry Pi Pico W, etc etc that support BLE and is supported by MicroBlocks. That makes working with BLE very easy when working with microcontrollers.
I am just wondering if your code would be useful with this extension. That is why I was asking.
Thank you for this extension. I will give it a chance and try it out. Maybe it solves a big problem i sometimes have and was not aple to reproduce it see here
Sometimes the error shown in your picture occures and sometimes not. I thought it has something to update my apps very often in time of development. For that reason i clear the app cache very often but i am not sure if this is realy the cause.
Some questions: Should I use your disconnect method (async) or can i also use the method from bluetoothClient1 (standard)? What does your method isConnected does exactly do? I ask because the standard method does not do what I expected. I thought that i can check if the connection is available but that does not work. To check if the connection still is available I have to send every few seconds a haeardbeat information to arduino. If this does not work I get an error which I catch and change the connection status on the screen.
Now - thanks again for your service - I can try it with your extension
Note : I am beginner in extension development. in some Projects its Works For Me . and in some project it Does not Work. So i provided Source with it . if any one can update then they can update source and re-post in app inventor or this post.
Use All Method From BluetoothClient1 For Remaining Purpose. Sync Extension Only Make Smooth Connection. Remaining thins need to do from BluetoothClient1.
otherwise when HC05 is ON its connect in second 
