Cat Litter Odour Motion Detector

Features

• Motion detection
• Air Quality Sensing
• MQTT Support - For Home Assistant
• OTA Updates - For easily remotely uploading firmware

Hardware required

• NodeMCU ESP8266 (you can use whatever version as long as it has an analogue pin for the odour sensor since it uses varying voltage levels depending on the air quality)
• Air Quality Sensor (MQ135)
• Mini PIR Motion Sensor (AM312)

Prerequisites

• Visual Studio Code (with Platform.IO plugin)
• USB to MicroUSB cable - for uploading the firmware and debug/monitoring