DIY smart home projects
Presence sensors, air-quality monitors, a voice assistant and more, each with a tutorial or source code you can follow.
Updated November 2026
Presence sensors, air-quality monitors, a voice assistant and more, each with a tutorial or source code you can follow.
Updated November 2026
Real projects with a published tutorial or source code. Each page starts with a quick “Can I build this?” check and links to the maker’s own guide.
Switches a fan on when the air gets damp, using dew point instead of a fixed humidity level.
Julius (jwmw), Home Assistant CommunityA soil moisture monitor that can trigger watering reminders or an irrigation system.
SmartHomeSceneDetects people even when they sit still, and reports to your hub over Zigbee.
SmartHomeSceneA waterproof ultrasonic sensor measures how full your rainwater tank is.
Simon GilletTurns an existing wired doorbell into a smart one: your hub knows when someone rings.
Franck Nijhof (frenck.dev)A voice assistant you build yourself, with microphones, a speaker, a rotary dial and a physical mute button.
esp32.diy (project by formatBCE)One device for CO₂, particles, VOC, NOx, temperature, humidity and room presence.
hubertciebiada (GitHub)A modular room sensor that combines radar, climate, light, air pressure and sound level.
PolarRaccoon (GitHub)An ultrasonic sensor measures how much fuel is left in a pellet boiler.
SmartHomeSceneProjects belong to their makers; we summarise and link to the original. Difficulty is our own rating. Cost and build time come from the maker; figures marked “indicative” are our own estimate.
Looking for something else? These sites are full of DIY builds you can follow.
A large curated list of real DIY builds by the community, each with its configuration or code.
Finished device projects you can install straight from your browser.
Detailed hardware tutorials with wiring diagrams and parts lists.
Community hardware builds, prototypes and experiments, often with full build logs.
Open-source firmware and hardware repositories tagged ESPHome.
Broader home automation projects, from integrations to complete systems.
Builds shared by other users, with discussion and troubleshooting.
Beginner-friendly electronics and automation tutorials with step-by-step photos.