Help with easy Multiplication for a new Entity

Configuration
1

Hi there, im trying to get a entity wich gets me the chargingpower of my Tesla. I have voltage and current via mqtt in HA and need a new entity wich simply multiplies these two entities.

i tried to implement a template sensor but it’s not showing up in HA after restart. The configuration check in Dev Tools is ok.

This is my template_sensor.yaml wich is included in configuration.yaml

- sensor:
      - name: "Tesla Ladeleistung"
        unit_of_measurement: "W"
        state_class: power
        state: >
          {% set voltage = states('sensor.tesla_charger_voltage') | float %}
          {% set current = states('sensor.tesla_charger_current') | float %}

          {{ (voltage * current) | round(2) }}

What i have to do to get this entity to show up in HA? This is my first integration with the “Template” Sensor.

Thanks!

2

That looks pretty good. You just need to add some default values for your float filters and adding an availability template is a good idea too. Oh and you got state class mixed up with device class:

- sensor:
    - name: "Tesla Ladeleistung"
      unit_of_measurement: "W"
      device_class: power
      state_class: measurement 
      state: >
        {% set voltage = states('sensor.tesla_charger_voltage') | float(0) %}
        {% set current = states('sensor.tesla_charger_current') | float(0) %}
        {{ (voltage * current) | round(2) }}
      availability: >
        {{ states('sensor.tesla_charger_voltage') | is_number and 
           states('sensor.tesla_charger_current') | is_number }}
3

Thanks!

I also added "state_class: “measurement”.

Now it’s showing up and i can test it when the car is sharging next time. How often does the value gets updated? When one of the input sensors get updated?

4

Yes when either one of the source sensors changes the template will be re-evaluated.

1 Like
5

Hi I was trying this for a solar pv total, but not seeming to be able to display it in HA dash.

template:
 - sensor:
    - name: "PV2 Power"
      unit_of_measurement: "W"
      device_class: power
      state_class: measurement 
      state: >
        {% set voltage = states('sensor.solis_modbus_pv_voltage_2') | float(0) %}
        {% set current = states('sensor.solis_modbus_pv_current_2') | float(0) %}
        {{ (voltage * current) | round(2) }}
        availability: >
        {{ states('sensor.solis_modbus_pv_voltage_2') | is_number and 
           states('sensor.solis_modbus_pv_current_2') | is_number }}

416046400_7189805454406639_6337591847902728348_n

6

Look at the indentation of availability: ... in your sensor compared to,mine. It should be the same as state:.