My understanding is that the standard will be open when it's final, but the working draft is not. The reference implementation is open during development: https

My understanding is that the standard will be open when it's final, but the working draft is not. The reference implementation is open during development: https://github.com/project-chip/connectedhomeip https://github.com/project-chip/connectedhomeip Disclaimer: not speaking for my employer or CSA/Matter (I have done paid work on the reference implementation).