[New device support] Tuya Fan Touch Switch TS0601 (_TZE204_w0ztfxrw) speed state sync issue

Link

https://www.tuya.com

Database entry

{"id":53,"type":"Router","ieeeAddr":"0xa4c138840823e1e5","nwkAddr":"0xDE9F","model":"TS0601","vendor":"Tuya","description":"Zigbee Fan Touch Switch","supported":false}

Zigbee2MQTT version

2.14.1-1

External definition

import * as tuya from 'zigbee-herdsman-converters/lib/tuya';
import * as exposes from 'zigbee-herdsman-converters/lib/exposes';

const e = exposes.presets;
const ea = exposes.access;

export default {
    fingerprint: tuya.fingerprint('TS0601', ['_TZE204_w0ztfxrw']),
    model: 'TS0601_fan_switch',
    vendor: 'Tuya',
    description: 'Zigbee Fan Touch Switch',
    extend: [tuya.modernExtend.tuyaBase({dp: true})],
    exposes: [
        tuya.exposes.switch(),
        e.power_on_behavior(['off', 'on']).withAccess(ea.STATE_SET),
        tuya.exposes.countdown().withValueMin(0).withValueMax(43200).withUnit('s'),
        e.numeric('fan_speed', ea.STATE_SET).withValueMin(1).withValueMax(5).withValueStep(1),
    ],
    meta: {
        tuyaDatapoints: [
            [1, 'state', tuya.valueConverter.onOff],
            [2, 'countdown', tuya.valueConverter.countdown],
            [3, 'fan_speed', tuya.valueConverterBasic.lookup({
                '1': tuya.enum(0), '2': tuya.enum(1), '3': tuya.enum(2),
                '4': tuya.enum(3), '5': tuya.enum(4),
            })],
            [11, 'power_on_behavior', tuya.valueConverterBasic.lookup({off: tuya.enum(0), on: tuya.enum(1)})],
        ],
    },
};

What does/doesn't work with the external definition?

The on/off toggle works and syncs bi-directionally. However, the fan speed control does not sync: changing the fan speed via the physical touch buttons changes the physical fan speed, but it does not update or reflect on the software UI slider/exposes state.

Notes

Device model is TS0601 with manufacturer signature _TZE204_w0ztfxrw. It appears datapunkt 3 needs proper handling for incoming speed reports to sync back to the state.

Start with the external definition for the TS0601 fingerprint _TZE204_w0ztfxrw, especially the datapoint 3 fan_speed mapping and its incoming-report handling. Verify that physical speed changes update the exposed software state and that the existing on/off synchronization remains working.