Esp8266MotionSensor

This project uses NodeMcu (ESP8266) to detect movement with 3 motion sensors (Hailege AM312 ). The state of the motion sensor is sent via MQTT. The project is ready for Homeassistant auto discovery.

BOM (bill of materials)

• NodeMCU ESP8266 WiFi Module
• 2x Hailege AM312

Wiring

• PowerSupply of the Motions Sensors: 3.3V
• First Motion Sensor (Out Pin) is connceted to D0/GPIO16
• Second Motion Sensor (Out Pin) is connceted to D1/GPIO5
• Third Motion Sensor (Out Pin) is connceted to D2/GPIO4

Developing Environment

• VS Code is used as IDE
• PlatformIO extension for building/uploading code
• 2 building enviorments:
  • [env:nodemcuv2]: using COM port to flash software
  • [env:nodemcuv2_ota]: using ArduinoOTA to flash over the air via WiFi

Features

• ArduinoOTA to flashing OTA
• Home Assistant auto discovery
  • discovery topic: homeassistant/binary_sensor/motion_sensor_floor_01/config

    {
      "name": "Motion Sensor Floor",
      "unique_id": "motion_sensor_floor_01",
      "device_class": "motion",
      "state_topic": "homeassistant/binary_sensor/motion_sensor_floor_01/state",
      "expire_after": "60"
    }

• send motion state via MQTT
  • state topic: homeassistant/binary_sensor/motion_sensor_floor_01/state (states: OFF or ON)

Getting Started

1. install VS Code and PlatformIO extension

2. enter secrets

   • rename secrets_dummy.h to secrets.h
   • enter your connection secrets

    // Wifi settings
    #define WIFI_SSID "";
    #define WIFI_PASSWORD ""
   
    // MQTT setting
    #define MQTT_SERVER ""
    #define MQTT_USER ""
    #define MQTT_PASSWORD ""

3. select [env:nodemcuv2] enviroment

4. build and upload