Message Stream
Fast Pair supports an RFCOMM channel for Providers that wish to maintain a persistent connection to a device during operation. When the Provider connects to a supported Seeker, the Seeker will attempt to connect RFCOMM on the following channel:
df21fe2c-2515-4fdb-8886-f12c4d67927c
Once connected, messages can be exchanged in the following format:
| Octet | Data Type | Description | Mandatory? |
|---|---|---|---|
| 0 | uint8 | Message group | Mandatory |
| 1 | uint8 | Message code | Mandatory |
| 2 - 3 | uint16 | Additional data length | Mandatory |
| 4 - n | Additional data | Optional |
The additional data length and additional data fields should be big endian.