Is there some documentation regarding Bluetooth Low Energy communication if I wanted to make my own "OBD-like" device? I know, that Bluetooth BR devices uses ELM 327 AT commands over the serial connection, but with BLE we have GATT characteristics and services. Are there some standard ones? I saw that RaceChrono supports at least one BLE OBD device (tonwon or something) so I assume it is technically possible to connect RaceChrono to a BLE reader. Oh and I have motorbikes in mind which do not support OBD so I wanted to start with my bike (FZ/MT 09) and maybe gradually hack some other models/brands later on.