Add support for ECA split AC (Broadlink RM4 Pro) - #1590
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This adds a new climate device code for ECA brand split air conditioners, controlled via Broadlink RM4 Pro. Details Manufacturer: ECA Controller: Broadlink (RM4 Pro) Modes: cool, heat, dry, fan_only Fan speeds: low, medium, high (silent also available, see note below) Swing: off, half_up, half_down, full Temperature range: 16-31°C, 1°C precision How the codes were generated All commands were captured directly from the OEM remote via Broadlink learning, then reverse-engineered to identify the underlying protocol structure (14-byte state frame, sent twice per transmission, with a simple checksum). Once the bit-level encoding for mode, fan speed, swing, and temperature was confirmed against ~11 independently captured real IR codes, the remaining combinations (full 16-31°C range across every mode/fan/swing combination) were generated programmatically and verified byte-for-byte against the real captures. Every mode, fan speed, and swing position has been tested on the physical unit and confirmed working, including the temperature range endpoints (16°C and 31°C). Notes The off command is state-independent — the AC only checks the power bit and ignores the rest of the frame, so a single off code works regardless of current mode/fan/swing. Dry mode only supports a single fixed fan speed on this unit (hardware limitation), so its commands are duplicated across all fan-mode keys to ensure the command fires regardless of which fan speed happens to be selected when switching to dry.
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This adds a new climate device code for ECA brand split air conditioners, controlled via Broadlink RM4 Pro.
Details
Manufacturer: ECA
Controller: Broadlink (RM4 Pro)
Modes: cool, heat, dry, fan_only
Fan speeds: low, medium, high (silent also available, see note below) Swing: off, half_up, half_down, full
Temperature range: 16-31°C, 1°C precision
How the codes were generated
All commands were captured directly from the OEM remote via Broadlink learning, then reverse-engineered to identify the underlying protocol structure (14-byte state frame, sent twice per transmission, with a simple checksum). Once the bit-level encoding for mode, fan speed, swing, and temperature was confirmed against ~11 independently captured real IR codes, the remaining combinations (full 16-31°C range across every mode/fan/swing combination) were generated programmatically and verified byte-for-byte against the real captures.
Every mode, fan speed, and swing position has been tested on the physical unit and confirmed working, including the temperature range endpoints (16°C and 31°C).
Notes
The off command is state-independent — the AC only checks the power bit and ignores the rest of the frame, so a single off code works regardless of current mode/fan/swing. Dry mode only supports a single fixed fan speed on this unit (hardware limitation), so its commands are duplicated across all fan-mode keys to ensure the command fires regardless of which fan speed happens to be selected when switching to dry.