Do a simple experiment in the home assistant

Control the Sonoff relays in real-time according to the power value of the energy meter

Abstract: 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.

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

welcome to discuss this topic here

The video tutorial of this document

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/master/Yaml in Home Assistant/ModbusTCP/modbus1.yaml)

   Three phase energy meter WEM3080T: [modbusTCP in Home Assistant](https://github.com/lewei50/Solar-PV-Monitoring/blob/master/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:

   

   

   

   

   

   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.

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

Use IAMMETER`s product in the Home assistant

1. Four methods available for integrating IAMMETER's energy meter into Home Assistant
2. Summary: How to use IAMMETER`s energy meter in Home assistant
3. Integrate the IAMMETER Wi-Fi energy meter(single phase and three-phase) into home assistant
4. IAMMETER energy meter support Modbus TCP

System && Products && Solutions

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