ESPHome-Devices

Rotary Encoder Volume Control

Rotary Encoder Volume Control

General Notes

This works with a typical rotary encoder hardware, and simply sets the volume on a Home Assistant media_player via automations.yaml. This does present some problems, for example if the esp device is restarted, the volume mutes to 0.0. I haven't bothered to fix this, but of course contributions welcome :)

These devices usually have a built in momentary switch which you activate by pressing on the control knob. You could use this, for example, to change the device that is being controlled. That would require some more HA automation.

You can also use this to control, for example, smart bulbs.

Wemos Pinout

PinFunction
D7Push Button on rotary encoder
D6Rotary Encoder pin_b
D5Rotary Encoder pin_a

Basic Configuration for esp8266 (I used a wemos)

esphome:
name: wemos
platform: ESP8266
board: d1_mini
wifi:
ssid: "ssid"
password: "wifi_password"
# Enable logging
logger:
# Enable Home Assistant API
api:
password: "api_password"
ota:
password: "ota_password"
binary_sensor:
- platform: gpio
pin:
number: D7
mode: INPUT_PULLUP
inverted: true
name: "Volume Switch Button"
sensor:
- platform: rotary_encoder
name: "Rotary Encoder"
pin_b:
number: D6
mode: INPUT
pin_a:
number: D5
mode: INPUT
max_value: 100
min_value: 0
resolution: 4

Home Assistant automations.yaml

{% raw %}

- id: Adjust Volume on Rotary Encoder Move
alias: Rotary Volume Change
trigger:
- platform: state
entity_id: sensor.rotary_encoder
action:
- service: media_player.volume_set
entity_id: media_player.kitchen
data_template:
volume_level: "{{ states.sensor.rotary_encoder.state | float / 100 }}"

{% endraw %}

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