Smart Weather Station ESP32: Control High-Voltage Appliances with a 2-Way Relay

Last winter my garage turned into a walk‑in freezer every night because I’d simply forget to flip the heater switch before bed. I wanted something that didn’t just display the temperature but actually did something with it—so I set out to build an ESP32 weather station that reads the room conditions and physically switches a high‑voltage appliance. The result is a small, Wi‑Fi‑connected brain that uses a 5V 2‑way relay module to control a space heater and an exhaust fan.