Notes

Notes:
Service: "0000ffe5-0000-1000-8000-00805f9b34fb"
Char: "0000ffe9-0000-1000-8000-00805f9b34fb"

Is the command Rx slot

Sending:

    "626e657874700d0a" is Next Page
    "626c617374700d0a" is previous Page
    "62726f7461740d0a" is rotate screen
    "6267657476610d0a" is "Device Notify" -> Causes the dongle to send back a burst of data

Service : "0000ffe0-0000-1000-8000-00805f9b34fb"
Char    : "0000ffe4-0000-1000-8000-00805f9b34fb"

This is the Rx Data from the dongle
It is sent as a notification even if you haven't enabled these officially :D