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Tuya ME201WZ

Water level sensor. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Tuya
Model
ME201WZ
Type
Other devices
Power
mains: usually a router that extends the mesh
Firmware updates (OTA)
no

Find it in shops: AliExpress

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What it exposes

FeaturePropertyValuesControl
Liquid stateliquid_statelow, normal, highread only
Liquid level percentliquid_level_percent%read only
Liquid depthliquid_depthmread only
VoltagevoltageVread only
Max setmax_set% · 0…100settable
Min setmin_set% · 0…100settable
Liquid depth maxliquid_depth_maxm · 0.1…10settable
Relay switchrelay_switch—settable
Pump modepump_modesupply, drainagesettable
Pump controlpump_controlauto, manualsettable
Versionversion—read only

MQTT: state and commands

Zigbee2MQTT publishes the device state to zigbee2mqtt/my_device (my_device is the name you give the device). An example message:

{
  "liquid_state": "low",
  "liquid_level_percent": 0,
  "liquid_depth": 0,
  "voltage": 230,
  "max_set": 50,
  "min_set": 50,
  "liquid_depth_max": 5,
  "relay_switch": false,
  "pump_mode": "supply",
  "pump_control": "auto",
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"relay_switch":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"pump_mode":"drainage"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"pump_control":"manual"}'

Watch the topics live from the browser: MQTT client.

How to pair it

  1. In Zigbee2MQTT click Permit join.
  2. Put the device in pairing mode: usually a long press of the reset button (5–10 s) until the LED blinks; bulbs: switch the power off and on 5–6 times.
  3. Keep the device close to the coordinator or a router while pairing.
  4. Give it a clear name: MQTT topics and Home Assistant entities are built from it.

Exact procedure and model notes: the device page in the Zigbee2MQTT docs. No coordinator yet: coordinator picker.

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