Matter; Chip controller and OTBR communication

[alvin7]

Hi, I am very new to matter and I would like to query some doubts I had regarding the communication between the chip controller and OTBR.

1. What protocol is used? I know the chip controller and the OTBR are communicating through local WiFi/ethernet, what I want to know is the underlying protocol used for communication?
2. What is the data format send by the controller to the OTBR? 
3. What happens when we type in a 'zcl' command in the chip controller? How does it process and send the data regarding the endpoints, clusters etc to the OTBR and in turn route it to the matter device?

[AHaug]

Hi,

alvin7 said:

Where do i get the matter specification?

You will have to be a member of the Matter Working Group to get access to the specification and I would recommend you ask the Connectivity Standard Alliance for which type of membership that would be (see https://csa-iot.org/ for more).

alvin7 said:

I want to control the matter device globally using MQTT in the border router, is there a sample code available or any documentation for said purpose?

Unfortunately we do not have any sample codes for that. As far as Matter and MQTT goes, they are unrelated tehcnologies so someone would need to implement a bridge device to combine those two. 

Kind regards,
Andreas