Protocol

This page describes the native communications protocol with the device. It is binary based, with a small header, and no other requirements on the data.

By convention, most (if not all) endpoints accept and provide data that is CBOR encoded.

Header

All packets have a simple four byte header that precedes the payload, regardless of the underlying transport:

• 1 byte: Message type
  • Indicates the "endpoint" inside the protocol handler that should receive this message
• 1 byte: Tag
  • Can be used to differentiate multiple outstanding requests and their replies
• 2 bytes: Length
  • Indicates the number of bytes of payload data that follow

Note that all multi-byte values in the header are sent in big endian (network) byte order.

Message Types

Below are all currently implemented message types/endpoints:

Number	Name	Description
0x01	Property Request	Get/set various properties on the device