Request the data of the Wi-Fi energy meter from the Modbus/TCP sensor , and control the sonoff relay in realtime

This experiment illustrates how to request the power value of the Wi-Fi energy meter (IAMMETER) from the modbus tcp sensor(Home assistant) in 1s/s (sample/second) and use this reading as the feedback value to control the SONOFF relay operate in real-time.

Compared to the IAMMETER`s integration in HA, the Modbus/tcp sensor in HA can request the data in 1 sec interval,this sample rate can do more interesting things.

The whole experiment effect is show in this video (the last 30 seconds of this video)

Request the data of energy meter in Home Assistant(modbus/tcp), trigger the Sonoff in realtime. - YouTube

Request the data of energy meter in Home Assistant(Modbus/TCP) in 1s/s(sample/second) and trigger the Sonoff in real-time.

Home Assistant Setting

  1. Configuration the IAMMETER`s energy meter in Home Assistant

    Single phase energy meter WEM3080: [modbusTCP in Home Assistant](https://github.com/lewei50/Solar-PV-Monitoring/blob/54bbbe2d858d3dc2b4b742cb89ef1b2687ff3cfc/Yaml in Home Assistant/ModbusTCP/modbus1.yaml)

    Three phase energy meter WEM3080T: [modbusTCP in Home Assistant](https://github.com/lewei50/Solar-PV-Monitoring/blob/54bbbe2d858d3dc2b4b742cb89ef1b2687ff3cfc/Yaml in Home Assistant/ModbusTCP/modbus.yaml)

    To use this sensor in your installation, add the following to your configuration.yaml file(for example WEM3080):

    Please remember to add ‘scan_interval: 1’ after ’ name: Modbus_Power’ to make home assistant to refresh the power reading every 1 second.

    # Example configuration.yaml entry for multiple TCP connections
    modbus:
      - name: hub11
        type: tcp
        host: 192.168.1.6
        port: 502
        sensors:
          - name: Modbus_Voltage
            slave: 1
            address: 0
            input_type: holding
            unit_of_measurement: V
            device_class: voltage
            state_class: measurement
            count: 1
            scale: 0.01
            offset: 0
            precision: 1
            data_type: uint16
          - name: Modbus_Current
            slave: 1
            address: 1
            input_type: holding
            unit_of_measurement: A
            device_class: current
            state_class: measurement
            count: 1
            scale: 0.01
            offset: 0
            precision: 1
            data_type: uint16
          - name: Modbus_Power
            slave: 1
            address: 2
            input_type: holding
            unit_of_measurement: W
            device_class: power
            state_class: measurement
            count: 2
            scale: 1
            offset: 0
            precision: 0
            data_type: int32
            scan_interval: 1
          - name: Modbus_ImportEnergy
            slave: 1
            address: 4
            input_type: holding
            unit_of_measurement: kWh
            device_class: energy
            state_class: total_increasing
            count: 2
            scale: 0.0003125
            offset: 0
            precision: 3
            data_type: uint32
          - name: Modbus_ExportGrid
            slave: 1
            address: 6
            input_type: holding
            unit_of_measurement: kWh
            device_class: energy
            state_class: total_increasing
            count: 2
            scale: 0.0003125
            offset: 0
            precision: 3
            data_type: uint32
    

  2. Add the opensource relay or the smart socket(Esphome, Tasmota,etc …) that supported in Home Assistant.
    What we used in this experiment is the sonoff (S26 ).

  3. Add the Automations in Home Assistant:

    when the power is greater than 1000, turn on Sonoff S26:

    Create automation

    Add a trigger condition in the automation of home assistant

    Power<500 then Turn off Sonoff S26:

The experiment effect

Use a Electric kettle to produce the load power.

At beginning ,the electric kettle is off,the load power is 0w, the sonoff smart socket is also off.

open the electric kettle, Modbus_Power=1596W > 1000W,then Sonoff S26 Relay turn on.

Ready to turn off the kettle.

The electric kettle is off , Modbus_Power=64W < 500W,the Sonoff S26 Relay turn off.

Use IAMMETER`s product in the Home assistant

1 Summary: How to use IAMMETER`s energy meter in Home assistant

2 Integrate the IAMMETER Wi-Fi energy meter(single phase and three-phase) into home assistant

3 IAMMETER energy meter support Modbus TCP

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