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Update electricity-grid.markdown (#18812)

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Add link to ESPHome ATM90E32 energy meter sensor.
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John 2021-08-09 09:21:49 -04:00 committed by GitHub
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@ -23,7 +23,7 @@ Home Assistant will need to know the amount of energy flowing through your meter
CT clamp sensors measure the instantaneous current passing through an electrical wire. To translate this into electrical power (W) you also need a voltage measurement, because Power = Current x Voltage.
In Home Assistant we have support for off-the-shelf CT clamp sensors and you can build your own with ESPHome's [CT Clamp Current sensor](https://esphome.io/components/sensor/ct_clamp.html).
In Home Assistant we have support for off-the-shelf CT clamp sensors and you can build your own with ESPHome's [CT Clamp Current sensor](https://esphome.io/components/sensor/ct_clamp.html). You can also use a dedicated energy meter sensor in ESPHome, which outputs more detailed data, like the [ATM90E32](https://esphome.io/components/sensor/atm90e32.html).
The off-the-shelf solution that we advice is the [Shelly EM](https://shop.shelly.cloud/shelly-em-2-x-120a-clamp-wifi-smart-home-automation?tracking=A7FsiPIfUWsFpnfKHa8SRyUYLXjr2hPq). The device has a local API, updates are pushed to Home Assistant and it has a high quality integration.