Bluetooth play music signal

[kodori1544]

Hello everyone
I'm making some project now and curious for something
If I have bluetooth earphone when I click play button my default music player
is playing right?

This means some signal is sent to phone
what kind of signal is going to android phone?
Please describe like this

when string "45" is sent to arduino
arduino makes motor moving

If using BLE, what is the service UUID?
please help me

 

[BayK]

It is more complicated then you think. There are multiple layers that are handled by drivers. You are not working with device by sending the binary commands, it is driver responsibility.
You should work with a driver.