danish2210 / SimpleMqttLibrary

Simple MQTT library to flooding mesh network.

SimpleMQTTLibrary (Version2) for flooding mesh network

fork from: https://github.com/arttupii/SimpleMqttLibrary

Version 2 Features added:

• bugfixes
• async publish/subscribe
• message delivery guarantee: repeat lost messages with timeout/backoff/repeat settings
• duplicate message cache, now we receive unique MQTT message only once
• secure random generator used
• new raw messages callback (see examples: TODO)
• resend message loop (must be called periodically)
• modified message format for more concise protocol
• main gateway node name is 'm' (DestinationDeviceName) (gateway to mqtt broker)
• new base64 library

Protocol messages:

DestinationDeviceName is usually a mqtt gateway name 'm'

Example:

"MQTT SrcNodeName/MsgUUID"
P:DestinationNodeName/temp/bme280/value 23.54
"

Subscribe topic nodename/led/value

"MQTT nodename/MsgUUID"
S:m/led/value
"

Publish topic nodename/led/value

"MQTT nodename/MsgUUID"
P:m/temp/bme280/value 23.54
"

Multiple MQTT commands in the same message

"MQTT nodename/MsgUUID"
G:device1/switch/led/value
S:device1/switch/led/set
G:device1/switch/led1/value
S:device1/switch/led1/set
G:device1/temp/dallas1/value
G:device1/temp/dallas2/value
G:device2/switch/led/value
S:device2/switch/led/set
"

"Compressed" message

"MQTT nodename/MsgUUID"
G:device1/switch/led/value     -->Topic is device1/switch/led/value
S:.../set                      -->Topic is device1/switch/led/set
G:../led1/value                -->Topic is device1/switch/led1/value
S:.../set                      -->Topic is device1/switch/led1/set
G:./temp/dallas1/value         -->Topic is device1/temp/dallas1/value
G:../dallas2/value             -->Topic is device1/temp/dallas2/value
G:device2/switch/led/value     -->Topic is device2/switch/led/value
S:.../set                      -->Topic is device2/switch/led/set
"