This is a custom component for ESPHome to integrate a smartmeter provided by Wiener Netze into Home Assistant via the infrared "Kundenschnittstelle". It gives power and energy readings, both positive and negative for active as well as reactive power.
The project is only named after the IM150 because that was the first smartmeter that was suppported. Below is an overview of currently supported devices:
Supported and tested
Possibly supported but untested
Currently unsupported
If you have one of the untested or unsupported devices (or any other devices supplied by Wiener Netze) and are willing to help me test this component, please open an issue.
Add the following code to your yaml file. Dont forget to add your encryption key from the smartmeter website otherwise it will not work.
external_components:
- source: github://bernikr/esphome-wienernetze-im150-smartmeter
logger:
baud_rate: 0
uart:
tx_pin: 1
rx_pin: 3
baud_rate: 9600
im150:
key: <enter your key here>
sensor:
- platform: im150
active_energy_pos:
name: Energy
active_power_pos:
name: Power
active_energy_neg:
name: Negative Energy
active_power_neg:
name: Negative Power
reactive_energy_pos:
name: Reactive Energy
reactive_power_pos:
name: Reactive Power
reactive_energy_neg:
name: Reactive Negative Energy
reactive_power_neg:
name: Reactive Negative Power
text_sensor:
- platform: im150
active_energy_pos:
name: Energy Raw
active_energy_neg:
name: Negative Energy Raw
reactive_energy_pos:
name: Reactive Energy Raw
reactive_energy_neg:
name: Reactive Negative Energy RawFor every sensor normal esphome sensor configs can be used to set name, id, icon, etc. or add filters and so on.
Warning
All energy sensors roll over every 1000 kWh and start again from 0 due to precision issues of ESPHome.
(Sensors are always 32bit floats. If the meter is too high the sensor cant update every Wh anymore.)
This is not a problem when using the active_energy_pos sensor for the energy dashboard in Home Assistant as it is set to total_increasing and therefore Home Assistant knows that a drop from 1000 to 0 is a reset of the counter and not a negataive consumption of 1000kWh.
As an alternative you can use the text_sensors which always result in the full counter of the meter (in Wh not kWh) but using them further would require a bit post processing (probably a template sensor) in Home Assistant in order to use them as proper numeric sensors.
This component shoud work on all ESP8266 and ESP32 microcontrollers with an IR read-head attached to them. I used a ready made read-write head with an ESP01s built in that I got for 30€ on ebay.
The following resources were much help in the development of this component:
Thanks to @cyranosaurus for helping me test the code on the IM151.