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Tuya 2CT

Bidirectional energy meter with 80A current clamp. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Tuya
Model
2CT
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
AC frequencyac_frequencyHzread only
VoltagevoltageVread only
PowerpowerWread only
Power apower_aWread only
Power bpower_bWread only
Current acurrent_aAread only
Current bcurrent_bAread only
Power factor apower_factor_a%read only
Power factor bpower_factor_b%read only
Energy aenergy_akWhread only
Energy benergy_bkWhread only
Update frequencyupdate_frequencys · 3…60settable
Timestamp atimestamp_a—read only
Timestamp btimestamp_b—read only
Calibration ac frequencycalibration_ac_frequency0.5…1.5settable
Calibration voltagecalibration_voltage0.5…1.5settable
Calibration power acalibration_power_a0.5…1.5settable
Calibration current acalibration_current_a0.5…1.5settable
Calibration power bcalibration_power_b0.5…1.5settable
Calibration current bcalibration_current_b0.5…1.5settable

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:

{
  "ac_frequency": 0,
  "voltage": 230,
  "power": 12.4,
  "power_a": 0,
  "power_b": 0,
  "current_a": 0,
  "current_b": 0,
  "power_factor_a": 0,
  "power_factor_b": 0,
  "energy_a": 0,
  "energy_b": 0,
  "update_frequency": 32,
  "timestamp_a": 0,
  "timestamp_b": 0,
  "linkquality": 120
}

The device only reports data and takes no commands.

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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