Update TP Link Switch markdown to include power readings (#7361)

* Update TP Link Switch markdown to include power

Update the markdown to include how to retrieve power readings from a switch that has Energy Monitoring features, such as the HS110 https://www.tp-link.com/us/products/details/cat-5516_HS110.html

* Use latest attributes and add friendly name

* remove comment in yaml

* Update kW to kWh

* Minor changes

source/_components/switch.tplink.markdown

@@ -22,6 +22,8 @@ Supported units:
 - HS110
 - HS200
 
+## {% linkable_title Configuration %}
+
 To use your TP-Link switch or socket in your installation, add the following to your `configuration.yaml` file:
 
 ```yaml
@@ -59,3 +61,35 @@ switch:
   - platform: tplink
     host: SECOND_IP_ADDRESS
 ```
+
+## {% linkable_title Configure Energy Sensors %} ##
+
+In order to get the power consumption readings from the HS110, you'll have to create a [template sensor](/components/switch.template/). In the example below, change all of the `my_tp_switch`'s to match your switch's entity ID.
+
+{% raw %}
+```yaml
+sensor:
+  - platform: template
+    sensors:
+      my_tp_switch_amps:
+        friendly_name_template: "{{ states.switch.my_tp_switch.name}} Current"
+        value_template: '{{ states.switch.my_tp_switch.attributes["current_a"] | float }}'
+        unit_of_measurement: 'A'
+      my_tp_switch_watts:
+        friendly_name_template: "{{ states.switch.my_tp_switch.name}} Current Consumption"
+        value_template: '{{ states.switch.my_tp_switch.attributes["current_power_w"] | float }}'
+        unit_of_measurement: 'W'
+      my_tp_switch_total_kwh:
+        friendly_name_template: "{{ states.switch.my_tp_switch.name}} Total Consumption"
+        value_template: '{{ states.switch.my_tp_switch.attributes["total_energy_kwh"] | float }}'
+        unit_of_measurement: 'kWh'
+      my_tp_switch_volts:
+        friendly_name_template: "{{ states.switch.my_tp_switch.name}} Voltage"
+        value_template: '{{ states.switch.my_tp_switch.attributes["voltage"] | float }}'
+        unit_of_measurement: 'V'
+      my_tp_switch_today_kwh:
+        friendly_name_template: "{{ states.switch.my_tp_switch.name}} Today's Consuption"
+        value_template: '{{ states.switch.my_tp_switch.attributes["today_energy_kwh"] | float }}'
+        unit_of_measurement: 'kWh'
+```
+{% endraw %}