Hello @Vishal_Nage1,
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 
Best regards