[External Converter]: TS0601 from _TZE284_y40tvzbu Vexa "Smart Radiator Controller" LDERV-B Tuya

Link

https://www.amazon.de/VEXA-Heizk%C3%B6rperthermostat-Smart-Home-Fernbedienung-Sprachsteuerung-Gruppensteuerung/dp/B0FZR1TH6V/ref=asc_df_B0FZR1TH6V?mcid=ad2fbda4d37530cba71216f128b42ad5&th=1&tag=googshopde-21&linkCode=df0&hvadid=789193950366&hvpos=&hvnetw=g&hvrand=13103147516021627838&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9042090&hvtargid=pla-2468526770384&hvocijid=13103147516021627838-B0FZR1TH6V-&hvexpln=0

Database entry

{ "battery": 71, "child_lock": "UNLOCK", "current_heating_setpoint": 15, "last_seen": "2026-09-13T21:42:09+02:00", "linkquality": 184, "local_temperature": 26.5, "system_mode": "auto" }

Zigbee2MQTT version

2.14.1 (unknown)

External converter

//  External Converter fuer Zigbee2MQTT
//  Vexa "Smart Radiator Controller" LDERV-B
//  TS0601 / _TZE284_y40tvzbu
//
//  v2: climate hat jetzt eine local_temperature (Ist-Temperatur),
//      damit Home Assistant die Thermostat-Discovery sauber anlegt.
//
//  Belegung (aus Discovery-Log abgeleitet):
//    dp 4  = Solltemperatur (÷10)
//    dp 2  = Modus (enum)          -> ggf. noch feinjustieren
//    dp 5  = Ist-Temperatur (÷10)
//    dp 6  = Batterie %
//    dp 7  = Kindersicherung
//
//  Einbinden: Datei nach /config/zigbee2mqtt/ , in configuration.yaml
//    external_converters:
//      - trv_vexa_lderv_b.js
//  dann Z2M neu starten + beim Geraet "Reconfigure".
// ============================================================
 
const exposes = require('zigbee-herdsman-converters/lib/exposes');
const tuya = require('zigbee-herdsman-converters/lib/tuya');
const e = exposes.presets;
const ea = exposes.access;
 
module.exports = {
    fingerprint: tuya.fingerprint('TS0601', ['_TZE284_y40tvzbu']),
    model: 'LDERV-B',
    vendor: 'Vexa',
    description: 'Smart Radiator Controller (TRV)',
    fromZigbee: [tuya.fz.datapoints],
    toZigbee: [tuya.tz.datapoints],
    onEvent: tuya.onEventSetTime,
    configure: tuya.configureMagicPacket,
    exposes: [
        e.battery(),
        e.child_lock(),
        e.climate()
            .withLocalTemperature(ea.STATE)
            .withSetpoint('current_heating_setpoint', 5, 35, 0.5, ea.STATE_SET)
            .withSystemMode(['off', 'auto', 'heat'], ea.STATE_SET),
    ],
    meta: {
        tuyaDatapoints: [
            // dp 4: Solltemperatur, Rohwert = °C x10
            [4, 'current_heating_setpoint', tuya.valueConverter.divideBy10],
            // dp 5: Ist-Temperatur, Rohwert = °C x10
            [5, 'local_temperature', tuya.valueConverter.divideBy10],
            // dp 2: Modus  -- Zuordnung ggf. nach Test anpassen
            [2, 'system_mode', tuya.valueConverterBasic.lookup({
                'auto': tuya.enum(0), 'heat': tuya.enum(1), 'off': tuya.enum(2),
            })],
            // dp 6: Batterie in %
            [6, 'battery', tuya.valueConverter.raw],
            // dp 7: Kindersicherung
            [7, 'child_lock', tuya.valueConverter.lockUnlock],
        ],
    },
};

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

=> Set Temperatur
=> Get actual Temperatur
=> Child lock
=> Battery status
=> System mode
=> Climate is supported

Notes

software_build_id: undefined
date_code: ``
endpoints:

{"1":{"clusters":{"input":["genGroups","genScenes","manuSpecificTuya","genBasic","60672"],"output":["genOta","genTime"]}}}

The issue provides a complete external JavaScript converter but no repository file or test path. Start by reviewing existing TS0601 device converters and the supplied fingerprint, exposes, and Tuya datapoint mappings. Done means the Vexa LDERV-B is recognized natively and its temperature, mode, child lock, and battery values work without an external converter.