prefixkit Ask an engineerAsk Support RU

Zigbee devices Smart plugs with energy metering

Tongou TOWSMR1-40A-AC

Single-phase multifunction RCBO (DIN Module). Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Tongou
Model
TOWSMR1-40A-AC
Type
Smart plugs with energy metering
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
On / offstate—settable
Temperaturetemperature°Cread only
CurrentcurrentAread only
PowerpowerWread only
VoltagevoltageVread only
EnergyenergykWhread only
Eventeventnormal, over_current_trip, over_power_trip, high_temp_trip, over_voltage_trip, under_voltage_trip, over_current_alarm, over_power_alarm …read only
Over voltage settingover_voltage_settingIgnore, Alarm, Tripsettable
Over voltage thresholdover_voltage_thresholdV · 240…295settable
Under voltage settingunder_voltage_settingIgnore, Alarm, Tripsettable
Under voltage thresholdunder_voltage_thresholdV · 145…220settable
Temperature settingtemperature_settingIgnore, Alarm, Tripsettable
Temperature thresholdtemperature_threshold°C · -25…100settable
Over power settingover_power_settingIgnore, Alarm, Tripsettable
Over power thresholdover_power_thresholdW · 5…25000settable
Auto reclosingauto_reclosing—settable
Restore defaultrestore_default—settable
Overcurrent Recloserovercurrent_recloser—settable
Leakage Recloserleakage_recloser—settable
Overpower Recloseroverpower_recloser—settable
Leakage currentleakage_currentmAread only
Over current settingover_current_settingIgnore, Alarm, Tripsettable
Over current thresholdover_current_thresholdA · 1…40settable
Leakage settingleakage_settingIgnore, Alarm, Tripsettable
Leakage thresholdleakage_thresholdmA · 30…100settable

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:

{
  "state": "ON",
  "temperature": 21.6,
  "current": 0.06,
  "power": 12.4,
  "voltage": 230,
  "energy": 3.21,
  "event": "normal",
  "over_voltage_setting": "Ignore",
  "over_voltage_threshold": 268,
  "under_voltage_setting": "Ignore",
  "under_voltage_threshold": 183,
  "temperature_setting": "Ignore",
  "temperature_threshold": 38,
  "over_power_setting": "Ignore",
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state":"TOGGLE"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"over_voltage_setting":"Alarm"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"under_voltage_setting":"Alarm"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"temperature_setting":"Alarm"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"over_power_setting":"Alarm"}'

Watch the topics live from the browser: MQTT client.

Home Assistant automation example

Zigbee2MQTT creates Home Assistant entities from the device name. If it is called my_device, an automation in automations.yaml can look like this:

- alias: "Turn off when idle"
  mode: single
  triggers:
    - trigger: numeric_state
      entity_id: sensor.my_device_power
      below: 2
      for: "00:15:00"
  actions:
    - action: switch.turn_off
      target:
        entity_id: switch.my_device

Check the YAML: YAML checker.

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?