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Protocol Specification

The gateway implements the RCT Power Serial Communication Protocol (document version 1.14) over TCP port 8899. The vendor document is the normative source for frame layout, CRC, escaping, data types and the object registry.

Download the specification (PDF)

Where it is used

Topic Code
Frames, escaping, CRC16-CCITT, value codecs app/protocol
Object registry (read objects, data types) app/catalog/objects.json, app/catalog
Write allowlist data/rct.db, app/allowlist.py

See Architecture for how these modules fit together.

Note

The PDF is a third-party document provided for reference. All rights remain with the vendor.