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daikin-altherma-esp32

ESP32-S3 firmware bridging a Daikin Altherma heat pump to MQTT

Lihan__

Published August 18, 2026

Original author: 0BuOriginal source (new tab)

daikin-altherma-esp32

Project description

Daikin Altherma → MQTT Bridge — One Cable Into the Cellar, One Register to Find It #W5500 #MACRAW #ESP32S3 #PoE #RuntimeDetection #ESP-IDF #MQTT #HomeAssistant #HeatPump #ModbusTCP #OTA 📚 Context: Open-source home-automation firmware (MIT, v1.0.0, 451 commits) — a single-developer project with an unusually disciplined engineering culture: host-tested pure logic, source-text contract tests in CI, and a documentation set that states why every decision was made. Implementation status: Fully implemented and running. The X10A protocol is validated against live bus captures; the W5500 wired…

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