ESPHome Multi-Sensor with Auto-Light control

ESPHome Multi-Sensor for use in conjunction with Home Assistant - with the added functionally of controlling automatic lights.

This is another take on having a device to control the automatic lights in rooms.

Change the $device_name, friendly_name and $ha_light substitutions before compiling.

Note: To calibrate the 'Ambient Light' calculations, shine a bright light on the LDR, click the button 'Light Sensor Update', then cover the LDR and click again.

You will also need to add two Automations to Home Assistant. These two automations will work with any number of devices.

alias: Auto-Light On
description: ""
trigger:
  - platform: event
    event_type: esphome.auto_light
    event_data:
      state: "on"
condition: []
action:
  - service: light.turn_on
    target:
      entity_id: "{{ trigger.event.data.entity_id }}"
mode: single

alias: Auto-Light Off
description: ""
trigger:
  - platform: event
    event_type: esphome.auto_light
    event_data:
      state: "off"
condition: []
action:
  - service: light.turn_off
    target:
      entity_id: "{{ trigger.event.data.entity_id }}"
mode: single

I also use a couple of Template sensors in HA to give me current Auto-Light settings:

- sensor:
    - name: "AutoLight Brightness"
      unique_id: autolight_brightness
      icon: mdi:brightness-auto
      unit_of_measurement: "%"
      state: >-
        {% if ( now().hour >= 23 ) %}
           {{ ( now().minute * -1.5 + 100 ) | int }}
        {% elif (( now().hour >= 9) or ( state_attr('sun.sun','elevation') >= 6.0 )) %}
          {{ 100 | int }}
        {% elif ( state_attr('sun.sun','elevation') < -18.0 ) %}
          {{ 5 | int }}
        {% else %}
          {{ (( state_attr('sun.sun','elevation') - 6 ) * 4.1 + 100) | int }}
        {% endif %}

    - name: "AutoLight Kelvin"
      unique_id: autolight_kelvin
      icon: mdi:temperature-kelvin
      unit_of_measurement: "K"
      state: >-
        {% if now().hour >= 23 %}
          {{ ( now().minute * -18 + 3820 ) | int }}
        {% elif now().hour >= 9 %}
          {{ 4000 | int }}
        {% elif state_attr('sun.sun','elevation') < -18.0 %}
          {{ 2200 | int }}
        {% else %}
          {{ ( state_attr('sun.sun','elevation') * 90.0 + 3820) | int }}
        {% endif %}

Using these two template sensors the Auto-Light On automation would be:

alias: Auto-Light On
description: ""
trigger:
  - platform: event
    event_type: esphome.auto_light
    event_data:
      state: "on"
condition: []
action:
  - service: light.turn_on
    data: 
      brightness_pct: "{{states('sensor.autolight_brightness')}}"
      kelvin: "{{states('sensor.autolight_kelvin')}}"
    target:
      entity_id: "{{ trigger.event.data.entity_id }}"
mode: single

Device Sensors, Controls and Configuration

Components

• Wemos D1 Mini (or Mini Pro)
• LDR Sensor + 4.7k ohm resistor
• BME280 module (or bme680)
• PIR Sensor (I'm using a Panasonic for reliability)
• Short 3-led RGB strip (WS2812b)

I have shoved it all inside a cheap black plastic box.

Here's a picture taken from above, where you can see the little plastic window for the LDR.

And here's one from below where you can see the bme280 sitting outside the box.

Wiring

LDR sensor

LDR	ESP
PIN 1	3.3v
PIN 2	A0

BME280 module

MODULE	ESP
SDA	D2
SCL	D1
VCC	VCC
GND	GND

PIR Sensor

PIR	ESP
OUT	D0
VCC	VCC
GND	GND

WS2818 LEDSTRIP

LED	ESP
D0	RX
VCC	VCC
GND	GND