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Smart home starter with ESP32

Four things in one build: a light that comes on by itself at dusk, temperature and humidity on a display, and movement in the room logged — all of it visible from your phone over Wi-Fi. The right starting point if you intend to automate a whole flat later.

Difficulty: Intermediate
Build time: 3 hours and 30 minutes
Soldering: A little
Estimated total: 920EGP

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What you will learn

Getting an ESP32 on Wi-Fi and reading its sensors in a browser
Switching a 220V load safely through an isolated relay
Reading light level with an LDR and deciding on a threshold
Combining several sensors into one control loop
Showing readings on an OLED and on a phone at the same time
Wiring it so you can add another sensor later