Case study

Hisense/Hitachi H-NET-Protocol: investigating heat-pump bus signaling

Hisense/Hitachi H-NET-Protocol investigates the H-NET bus used by Hi-Therma and Air H₂O 400 heat pumps. Its documentation maps controller connections on an AHZ-080HCDS1 unit and describes the two-wire HBS signaling, frame fields and checksums.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-07
Evidence class: C2 code & docs, no demo or download

Stars: 7
Last commit: 2026-10-18

GitHub data as of 2026-11-10

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Evidence

Observed: Code, documentation and a demo observed; no download method found.
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

Scope: The documented test unit is a Hisense AHZ-080HCDS1 heat pump.
Limits: The custom Home Assistant component is planned.
License: No licence file in the repository.

Cite

BibTeX

@misc{hisense-h-net-protocol-case,
  title = {{Hisense/Hitachi H-NET-Protocol: investigating heat-pump bus signaling}},
  howpublished = {\url{https://github.com/alex89rm/Hisense-H-NET-Protocol}},
  url = {https://github.com/alex89rm/Hisense-H-NET-Protocol},
  urldate = {2026-11-07},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/hisense-h-net-protocol-case/}}
}

Plain text

Hisense/Hitachi H-NET-Protocol: investigating heat-pump bus signaling. https://github.com/alex89rm/Hisense-H-NET-Protocol (accessed 2026-11-07). Awesome REA entry: https://awesomerea.org/resources/hisense-h-net-protocol-case/

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About this entry

The description was reviewed against primary sources.

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Primary sources

README.md GitHub · alex89rm/Hisense-H-NET-Protocol · Revision 8def3ab
docs/H-NET_PROTOCOL.md GitHub · alex89rm/Hisense-H-NET-Protocol · Revision 8def3ab