ESP32
How I Built a Smart Home Relay Module for Under $5 (DIY Guide 2025)
In this in-depth, step-by-step guide, I’ll show you exactly how I built a Wi-Fi-controlled smart relay module for under $5 — using cheap, readily available parts. I’ll cover schematics, wiring, code, safety, and even some tips to make it robust enough for daily use. Are you looking for an affordable Read more…