IoTaWatt
Integration for the IoTaWatt Open WiFi Electricity Monitor. It will collect data from the Current Transformer Clamps (Input CTs) and any Outputs that are defined on the IoTaWatt and create them as sensors in Home Assistant.
Configuration
Adding IoTaWatt to your Home Assistant instance can be done via the user interface, by using this My button:
If the above My button doesn’t work, you can also perform the following steps manually:
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Browse to your Home Assistant instance.
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In the sidebar click on Settings.
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From the configuration menu select: Devices & Services.
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In the bottom right, click on the Add Integration button.
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From the list, search and select “IoTaWatt”.
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Follow the instruction on screen to complete the set up.
Energy management
You can use the energy sensors directly with the Home Assistant energy dashboard.
If you have an energy production system such as solar panels, follow these instructions:
Configure IoTaWatt
You will need to configure two new IoTaWatt output sensors:
| Name | Unit | Formula |
|---|---|---|
| MainsConsumption | Watts | (Main_In_Red + Main_In_White + Main_In_Blue) max 0 |
| MainsExport | Watts | ((Main_In_Red + Main_In_White + Main_In_Blue) min 0) abs |
Replace (Main_In_Red + Main_In_White + Main_In_Blue) with the correct formula for your main feed.
Using a solar net system
The IoTaWatt team recommends that the inputs for solar reads positive which can be achieved by either changing the orientation of the CT sensor or in the IoTaWatt’s input settings, check Reverse.
Replace (Main_In_Red + Main_In_White + Main_In_Blue) with (Main_In_Red + Main_In_White + Main_In_Blue - Solar)
If you have two solar sensors named Solar1 and Solar2 you would use:
(Main_In_Red + Main_In_White + Main_In_Blue - Solar1 - Solar2)
Configure Energy Management
In the Grid Consumption settings, select MainsConsumption.wh
In the Return to grid settings, select MainsExport.wh
In the Solar production settings, select Solar.wh