Based on your question, it sounds like you do not understand how your Bluetooth module works or how to communicate with it from a computer or Android device. Since we do not make those products and are not very familiar with them, those are things you would need to figure out yourself.
You can control the Maestro by sending it serial commands, documented in that ("Serial Interface") section of the Maestro user's guide, via its TTL serial interface.
The Bluetooth module you linked to in your first post looks like it can replace a serial communication interface between two devices (e.g. your Maestro and computer or Android device). You would connect the Maestro's serial interface to the Bluetooth module.
On your computer or Android device, you would need to pair with that Bluetooth module, configure it, and then send bytes to it. The bytes you send should get relayed to the Maestro, and if you send the correct sequence of bytes as specified in the Maestro user's guide, then the Maestro would interpret those bytes as commands. If possible, you might want to test the connection using our Serial Transmitter utility (for Windows) to send commands to the Maestro. If not, any other serial terminal program that sends raw, binary bytes will work.
Also, you mentioned having trouble understanding how TTL serial communication works. If you ask specific questions, it will help me understand what to clarify.