Dear @Christiamee_Gavilan, by reading your last posts, I'm afraid we are still a bit far from the solution. Some time ago I've posted the below linked showcase to show how to connect an AI2 app toward an ESP32 (Arduino family) board on both Classic and BLE Bluetooth. You'll find there both the AI2 code (blocks) and the Arduino ones (.ino for ESP32). Since you don't use the Classic BT, you can forget the AI2 code related to the Classic, and focus your attention to the BLE section only (the app works also if only the BLE is used, you don't have to cancel the Classic part, until you'll be ready to do that).
I know you don't have an ESP 32, but an HC05 (connected to which Arduino board: UNO, Mega, Nano, else ?) but I don't have a specific example for the HC05. Anyway I guess it could help you in understanding the very basics for a BLE comm's between an AI2 app and an Arduino system.
And also don't forget to have a look to the web sites I've already suggested you:
"@ChrisWard (professorcad); @TIMAI2 (metricrat); @Juan_Antonio (kio4) and the FAQ managed and supported by @ABG"
Here's the link:
PS what is your native language ? 