Fanspeed doesn't work on zhimi.airpurifier.v6

[wifiovermybody]

All advertised features work on zhimi.airpurifier.v6 except Fan Speed. which gives this error in HomeBridge log:

[12/25/2021, 6:17:12 PM] [homebridge-xiaomi-mi-air-purifier] This plugin threw an error from the characteristic 'Rotation Speed': Unhandled error thrown inside write handler for characteristic: device.changeFanSpeed is not a function. See https://git.io/JtMGR for more info.
MiioDevice {
model=zhimi.airpurifier.v6,
types=miio:air-purifier, sensor, miio, air-purifier,
capabilities=fan-speed, miio:buzzer, miio:led-brightness, miio:switchable-led, pm2.5, relative-humidity, temperature, switchable-mode, mode, switchable-power, restorable-state, power, state
}

Using the fanspeed slider in Homekit gives above error in HomeBridge and Homekit says "No Response"

Expected behavior:

Simple fan slider

Logs:

Show the Homebridge logs here, remove any sensitive information.

[12/25/2021, 6:17:12 PM] [homebridge-xiaomi-mi-air-purifier] This plugin threw an error from the characteristic 'Rotation Speed': Unhandled error thrown inside write handler for characteristic: device.changeFanSpeed is not a function. See https://git.io/JtMGR for more info.
MiioDevice {
model=zhimi.airpurifier.v6,
types=miio:air-purifier, sensor, miio, air-purifier,
capabilities=fan-speed, miio:buzzer, miio:led-brightness, miio:switchable-led, pm2.5, relative-humidity, temperature, switchable-mode, mode, switchable-power, restorable-state, power, state
}

Show your Homebridge config.json here, remove any sensitive information.

Screenshots:

Environment:

• Plugin Version: homebridge-xiaomi-mi-air-purifier v2.0.2
• Homebridge Version: homebridge -v1.3.8
• Node.js Version:
• NPM Version:
• Device: zhimi.airpurifier.v6 (as stated in token extractor
• Operating System: Docker

[vitaliy-kozlov]

same issue with 2S

[dominikszewczyk]

same for 1

[szkocot]

After some trial and error, got it working with https://github.com/merdok/homebridge-miot.

All controls including fan speed, mode, led/buzzer control, humidity/temp sensors are working fine. I was finally able to get rid of xiaomi app.

Be aware, that your mi purifier may not be registered on a server in China, so it may get the wrong token from your login/password. Also, I've had to switch to config json, because miot config WebUI was unstable for me.

I've used https://github.com/PiotrMachowski/Xiaomi-cloud-tokens-extractor to get token for de server.
Here's my config:

{
    "platforms": [
        {
            "name": "Config",
            "port": 8581,
            "platform": "config"
        },
        {
            "devices": [
                {
                    "name": "Air Purifier 2",
                    "ip": "secret",
                    "token": "secret",
                    "deviceId": "secret",
                    "model": "zhimi.airpurifier.m1",
                    "pollingInterval": 7,
                    "deepDebugLog": false,
                    "micloud": {
                        "timeout": 10000,
                        "username": "secret",
                        "password": "secret",
                        "forceMiCloud": false,
                        "country": "de"
                    },
                    "buzzerControl": true,
                    "ledControl": true,
                    "showTemperature": true,
                    "screenControl": true,
                    "fanLevelControl": true,
                    "modeControl": true
                }
            ],
            "platform": "miot"
        }
    ]
}