88 lines
2.8 KiB
Markdown
88 lines
2.8 KiB
Markdown
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# Gree IR Blaster
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ESPHome firmware for a Wemos D1 Mini (ESP8266) driving a Gree air conditioner
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over IR, exposed to Home Assistant via the native ESPHome API (no MQTT, no
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Broadlink, no Tuya).
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## Hardware
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- Wemos D1 Mini (ESP8266)
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- Grove IR Emitter
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- Grove IR Receiver
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### Wiring
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| Grove module | Pin | Wemos D1 Mini |
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|---|---|---|
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| IR Emitter | SIG | D5 |
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| IR Emitter | VCC | 5V |
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| IR Emitter | GND | GND |
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| IR Receiver | SIG | D6 |
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| IR Receiver | VCC | **3V3** — not 5V, ESP8266 GPIO is not 5V-tolerant |
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| IR Receiver | GND | GND |
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## Home Assistant / deployment model
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HA on piha runs as the `home-assistant:stable` Docker container, not HAOS, so
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ESPHome is **not** installed as an add-on. It runs as a one-off container via
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`docker compose run --rm` — there is no ESPHome daemon on piha. Compile/flash
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is a manual, operator-triggered action; this device is intentionally **not**
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registered in `hosts/piha/services.yaml`.
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Once flashed, the device advertises itself via mDNS and shows up as a
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discoverable ESPHome device in Home Assistant (Settings → Devices & Services
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→ Add Integration → ESPHome).
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## First flash (USB)
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1. Copy `secrets.yaml.example` to `secrets.yaml` and fill in `wifi_ssid`,
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`wifi_password`, `fallback_password`.
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2. Wire the board as above and plug it into piha via USB.
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3. Run:
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```
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./deploy.sh --usb
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```
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This flashes over `/dev/ttyUSB0`.
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## Subsequent flashes (OTA)
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Once the device is on WiFi, redeploy without `--usb`:
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```
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./deploy.sh
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```
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This runs `docker compose run --rm esphome run gree-ir-blaster.yaml`, which
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flashes over the network via the ESPHome OTA protocol.
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## Identifying the Gree protocol variant
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The `climate: platform: gree` component needs a `model:` matching your AC's
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remote protocol. `gree-ir-blaster.yaml` currently ships with `model: yan` as
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a starting guess — this is **not verified** and must be confirmed against the
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actual remote.
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To identify the correct variant:
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1. Flash the firmware and let the device boot (WiFi connected).
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2. Tail the logs:
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```
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docker compose run --rm esphome logs gree-ir-blaster.yaml
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```
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3. Point the physical Gree remote at the Grove IR Receiver and press a button
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(e.g. power on, or change temperature). `dump: all` on `remote_receiver`
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causes ESPHome to log the raw/decoded IR data it captured.
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4. Compare the decoded output against the known Gree variants supported by
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ESPHome and pick the closest match:
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- `generic`
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- `yan`
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- `yaa`
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- `yac`
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- `yac1fb9`
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- `yx1ff`
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- `yag`
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5. Update `model:` in `gree-ir-blaster.yaml` to the matching variant, then
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redeploy (`./deploy.sh`) and verify the AC responds correctly to commands
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sent from Home Assistant (power, mode, temperature, fan speed).
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If none of the variants behave correctly, capture the raw IR dumps and check
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the ESPHome `gree` component issue tracker / docs for newer variants.
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