B4J Question Question about MQTT Sparkplug B

[giggetto71]

All,
I am starting to look into Sparkplug B as I see it growing really fast in the Iot space.

https://sparkplug.eclipse.org/specification/version/2.2/documents/sparkplug-specification-2.2.pdf

Apparently it's a very nice application layer addition to the MQTT protocol, basically it defines a standard message structure

namespace/group_id/message_type/edge_node_id/[device_id]

where the message_type is further specified to include a lot of structured info:
• NBIRTH – Birth certificate for MQTT EoN nodes. • NDEATH – Death certificate for MQTT EoN nodes. • DBIRTH – Birth certificate for Devices. • DDEATH – Death certificate for Devices. • NDATA – Node data message. • DDATA – Device data message. • NCMD – Node command message. • DCMD – Device command message. • STATE – Critical application state message.


Additionally, the Sparkplug B specs relies on google protobuffers to encode and decode the payloads.

Now two question
1- is there a B4x mqtt library supporting sparkplug B ?
2- I know very little about google protobuf but I believe are a form of serialization, is there any available implementation of protobuf or examples to do that using B4XSerialiaziation ?

any help welcome!!!

 

[Erel]

B4XSerialization is different than protobuf. Your best option is to find a Java library that creates such messages and integrate it.

 

[pcicom]

You can installa MQTT with LINUX mosquitto, and you can invent you self protocol of code ...