prefixkit Ask an engineerAsk Support RU

Zigbee devices Other devices

BITUO TECHNIK SDM02-U02

Smart energy monitor for 2P+N system. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
BITUO TECHNIK
Model
SDM02-U02
Type
Other devices
Power
mains: usually a router that extends the mesh
Firmware updates (OTA)
no

Find it in shops: AliExpress

Links open a search in the shop; some are affiliate links: buying through them costs you nothing extra and supports this site. We do not sell devices or get them from manufacturers.

What it exposes

FeaturePropertyValuesControl
Power phase bpower_phase_bWread only
Power reactivepower_reactiveVARread only
Power reactive phase bpower_reactive_phase_bVARread only
Power apparentpower_apparentVAread only
Power apparent phase bpower_apparent_phase_bVAread only
Current phase Bcurrent_phase_bAread only
Voltage phase Bvoltage_phase_bVread only
Power factor phase bpower_factor_phase_b—read only
Total powertotal_powerWread only
Total power reactivetotal_power_reactiveVARread only
Total power apparenttotal_power_apparentVAread only
PowerpowerWread only
VoltagevoltageVread only
AC frequencyac_frequencyHzread only
Power factorpower_factor—read only
CurrentcurrentAread only
EnergyenergykWhread only
Produced energyproduced_energykWhread 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:

{
  "power_phase_b": 0,
  "power_reactive": 0,
  "power_reactive_phase_b": 0,
  "power_apparent": 0,
  "power_apparent_phase_b": 0,
  "current_phase_b": 0,
  "voltage_phase_b": 0,
  "power_factor_phase_b": 0,
  "total_power": 0,
  "total_power_reactive": 0,
  "total_power_apparent": 0,
  "power": 12.4,
  "voltage": 230,
  "ac_frequency": 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.

Similar devices

Idea?