ESPHome PWM fan using a Wemos D1 mini lite

ventilation.yaml

# Controlling my Buva Qstream ventilation system using:
# * A Wemos D1 mini lite (an ESP8266 based board)
# * A Wemos power shield so I can power the Wemos from the ventilation units 12V supply.
# * A simple PWM to 10V convertor like this: https://www.cheaptech.nl/pwm-signaal-te-voltage-converter-1-3-khz-0-10-v-pw.html
# * The amazing ESPHome firmware tool: https://esphome.io
# * Home Assistant to tie it all together: https://www.home-assistant.io
#
# I used to use a Raspberry Pi and some Python code for this. See https://gist.github.com/SqyD/a927ab612df767a0cc892bcde23d025c
# The Wemos approach seems more stable and doesn't require external USB power.

esphome:
  name: ventilation
  platform: ESP8266
  board: d1_mini_lite

wifi:
  ssid: "SSID"
  password: "secret"

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

output:
  platform: esp8266_pwm
  pin: D3
  frequency: 5000 Hz
  id: pwm_output

fan:
  platform: speed
  output: pwm_output
  name: "Ventilation"
  speed:
    low: 0.05
    medium: 0.4
    high: 1

BTW, do you know the model of that ventilation you had in your old apartment?

@poldim The model is mentioned in the first line of the comment of this yaml.