Docs for IAMMETER devices (#11630)

* logo for iammeter devices

* docs for IAMMETER devices

* Update source/_integrations/iammeter.markdown

Co-Authored-By: Marc Randolph <mrand@users.noreply.github.com>

* Update source/_integrations/iammeter.markdown

Co-Authored-By: Marc Randolph <mrand@users.noreply.github.com>

* Tweaks and adjustments

Co-authored-by: Marc Randolph <mrand@users.noreply.github.com>
Co-authored-by: Franck Nijhof <git@frenck.dev>

source/_integrations/iammeter.markdown

@@ -0,0 +1,83 @@
+---
+title: "iammeter"
+description: "Instructions on how to integrate IAMMETER sensor within Home Assistant."
+logo: iammeter-logo.png
+ha_category:
+  - Energy
+  - Sensor
+ha_release: 0.107
+ha_iot_class: Local Polling
+ha_domain: iammeter
+---
+
+`iammeter` provides real-time readings of single-phase (WEM3080, WEM3162) and three-phase (WEM3080T) meters from [IAMMETER](https://www.iammeter.com) over Wi-Fi.
+
+## Configuration
+
+To use this sensor in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  - platform: iammeter
+    host: IP_ADDRESS_OF_HOST
+```
+
+{% configuration %}
+host:
+  description: The IP address of your IAMMETER.
+  required: true
+  type: string
+port:
+  description: port of your IAMMETER.
+  required: false
+  default: 80
+  type: integer
+name:
+  description: Name for the sensor entity.
+  required: false
+  type: string
+  default: IamMeter
+{% endconfiguration %}
+
+## Sensors
+
+Sensors available in the library:
+
+### Single-phase energy meter (WEM3080/WEM3162)
+
+| name               | Unit | Description                                           |
+|--------------------|------|:-----------------------------------------------------------------------------|
+| wem3080_voltage       | V    | Voltage.                                     |
+| wem3080_current       | A    | current.                                           |
+| wem3080_power         | W    | active power.                                    |
+| wem3080_importenergy  | kWh  | Energy consumption from gird |
+| wem3080_exportgrid    | kWh  | Energy export to grid    |
+
+### Three-phase energy meter (WEM3080T)
+
+| name               | Unit | Description                                           |
+|--------------------|------|:-----------------------------------------------------------------------------|
+| wem3080t_voltage_a      | V    | A phase voltage       |
+| wem3080t_current_a      | A    | A phase current |
+| wem3080t_power_a        | W    | A phase active power  |
+| wem3080t_importenergy_a | kWh  | A phase import energy |
+| wem3080t_exportgrid_a   | kWh  | A phase export energy |
+| wem3080t_frequency_a    | kWh  | A phase frequency     |
+| wem3080t_pf_a           | kWh  | A phase power factor  |
+|                       |      |                |
+| wem3080t_voltage_b      | V    | B phase voltage       |
+| wem3080t_current_b      | A    | B phase current       |
+| wem3080t_power_b        | W    | B phase active power  |
+| wem3080t_importenergy_b | kWh  | B phase import energy |
+| wem3080t_exportgrid_b   | kWh  | B phase export energy |
+| wem3080t_frequency_b    | kWh  | B phase frequency     |
+| wem3080t_pf_b           | kWh | B phase power factor  |
+|                       |      |                |
+| wem3080t_voltage_c      | V    | C phase voltage       |
+| wem3080t_current_c      | A    | C phase current |
+| wem3080t_power_c        | W    | C phase active power |
+| wem3080t_importenergy_c | kWh  | C phase import energy |
+| wem3080t_exportgrid_c   | kWh  | C phase export energy |
+| wem3080t_frequency_c    | kWh  | C phase frequency |
+| wem3080t_pf_c           | kWh  | C phase power factor |