The Messaging of Things

Considerations

• Size.
• Robustness.
• Speed.

Example

• Timestamp, temperature, humidity.

Encodings

• Json: 65 bytes.
• Remove whitepsace.
• Abbreviate names: 35 bytes.
• Avro. Define fields in JSON schema not message. 281 bytes.
• Avro batched: 13 bytes.
• Avro time stamps: 9 bytes.
• Protocol Buffers. Fields tagged with number. 9 bytes.
• Protocol Buffers repeated readings: 18 bytes.
• Protocol Buffers time stamps: 14 bytes.

Protocols

• JSON-HTTP: 112 bytes
• Can reduce to only Host header with HTTP/1.1.
• Can remove Host header with HTTP/1.0.
• HTTP/2: Header compression. HPACK.
• MQTT - not a queue. Uses Broker. 2bytes headers.
• Websockets - no additional headers. No topic.
• MQTT over websockets.
• GRPC - server to server.