Hi guys,
I want to make an Mobile app which can connnect to the Smart Xiaomi Projector (Android). With a smartphone, the teacher can control the powerpoint file which is saved locally in the projector. It's like the Mi Home app, make a phone become a remote control.
I'm new with BLE and NodeRed, as I know, I need to define :
Connection between phones and a projector (BLE).
Protocol to transfer/receive commands from a phone to the projector.
Apply these commands to powerpoint files in the projector.
My phone is connected to the projecteur via Bluetooth, next step is looking for a protocol. Do you know what protocol that i need to use in this case? And then how to apply commands received to powerpoint files in the projector so that I can control it?
I don't understand why do we need API for this communication between them, this communication is via Bluetooth? Please tell me if you need any more details.