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Inside the Hisense H-NET Protocol: A Reverse Engineering Journey – Part 1

This article documents the reverse engineering process of the Hisense H-NET protocol, used by certain heat pump systems for internal communication between the indoor controller and the outdoor unit. My goal was to understand the structure of this protocol and pave the way for custom integration with Home Assistant. The unit I analyzed, the AHZ-080HCDS1, is not…
