Ask for help with android app

[Frokkzy]

Hi sorry for my english I remeber 2 weeks ago that i have an old Elogoo robot who work with bluetooth. To control my robot i use the official app name's ELEGOO BLE TOOL APP. I need your help because im actualy in school and i have for task to create a APP who can work with my arduino bluetooth card. For now your app is the only one I find who connect and send data. When i connect to Bluetooth i had to edit to had custom profil and this work well. But i trie to create an app who can work with app inventor but it's not working. I think maybe i can take the base of your app in android studio a rebuild to add functione like when i presse a bouton it's send "f" to the terminal ? maybe you can help me ?