Motion activated Light

This is a Firmware to have motion activated lighting that can also be controlled manually via MQTT and is fully compatible with Home Assistant.

Hardware

You will need:

• Wemos D1 Mini
• Generic PIR Sensor
• Generic LDR
• WS2812B LEDs
• Resistor
• Button (optional)

Attach the LDR to the A0 Pin with a voltage divider circuit. Attach the PIR to the PIRPIN and the LEDs to the LEDPIN.

If you want to use the button to turn on and off the light you need to attach the button so it connects BUTTONPIN to ground.

Installation

1. Open the project in the Arduino IDE
2. Set the settings in the Motion-activated-light.ino file
3. Flash your microcontroller with the code

Home Assistant

Assuming your DEVICE_ID is 001 add this light:

- platform: mqtt
  name: "Light 001"
  state_topic: "/001/command/state"
  command_topic: "/001/command"
  brightness_state_topic: "/001/brightness/state"
  brightness_command_topic: "/001/brightness"
  brightness_scale: 255
  rgb_state_topic: "/001/rgb/state"
  rgb_command_topic: "/001/rgb"
  qos: 0
  payload_on: "ON"
  payload_off: "OFF"
  optimistic: false
  retain: true

this switch:

- platform: mqtt
  name: Light 001 Motion Detection
  state_topic: "/001/motion_detection/state"
  command_topic: "/001/motion_detection"
  payload_on: "ON"
  payload_off: "OFF"
  state_on: "ON"
  state_off: "OFF"
  retain: true

and those sensors:

- platform: mqtt
  name: "Illumination 001"
  state_topic: "/001/light/state"
  unit_of_measurement: "%"
  value_template: "{{ value | multiply(0.09765625) }}"
- platform: mqtt
  name: "Motion 001"
  state_topic: "/001/motion/state"
  unit_of_measurement: "Bool"