Need help to connect google assistant to my app

Hi I have build an app that allows the user to turn on a motor via bluetooth(hc05) connected to an arduino nano and i want to use google assistant so suppose that when the app is in the background and i am in the home screen so i can activate google assistant and speak a command and the app will send a bluetooth signal. which extension can i use for that?
BT_Control_4Load (2).aia (2.9 MB)

No extension required, Both Speech and Classic Bluetooth functions (HC05) are built into App Inventor.

Example Project:
BT_Basic_Setup_Send_Cmds.aia (8.4 KB)

Note, if the target object is a fast moving object like a model car, speech recognition is not suitable.