PROJECT / ESP32 APPLICATION
Chang Hong Ice Maker Esphome
长虹CH-Z6Y3制冰机接入HomeAssistant ESPHome固件，通过ESP32-C3实现状态识别、远程开关、大小冰切换与UV控制
About this project
A Changhong CH-Z6Y3 ice maker gains a Home Assistant presence by tapping its five-wire P1–P5 panel with an ESP32-C3 Super Mini. The board reads the panel lines as high-impedance ADC inputs at about 1 kHz and recognises standby, large ice and small ice from relative signatures such as `0HHHH` and `MHMHH`, then presses the original keys by pulling a GPIO low for roughly 100 or 80 ms. Power, large/small ice and an UV toggle show up as HA entities over ESPHome's native API. No common ground is used and the C3 runs from its own USB supply; the direct GPIO hookup is called electrically risky, with current limiting or isolation advised for long-term use. Only CH-Z6Y3 is supported.
Open project preview ↗Hardware
Boards: ESP32
Supported hardware: ESP32. Confirm the exact board revision and pin map in the upstream repository.
What the source supports
Upstream evidence: Reviewed from public README media at commit 8e0412439339 under BSD-3-Clause. Firmware was not executed.
Media credit & rights
Upstream project media · rights remain with its owner · Credit: Ljzd-PRO
Screenshots decoded from the upstream README at a pinned commit. Repository code and firmware were not executed; the license texts are included in the preview package.
View original source ↗ Copyright & removal · Reviewed
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