I have some experience with Bluetooth Communication (RF Comm).. More recently, I played with Android 7 and BLE API (permission, scanning, displaying modifying parameters).
Not having access to the hardware is an issue. One solution would be to install a stub application on your device locally that I could communicate with remotely and doing experimentation. Do you think it would be possible to have an always on Android device nearby your BT devices and connected to internet?
Availability: this Wed, Thur, Fri, Sun, Mon, Tue to complete the project.