ESPHome: Building Custom Sensors for Home Assistant

Tue, 21 Apr 2026 10:00:00 +0000

There is a particular joy in solving a problem with three quid of silicon instead of forty quid of someone else’s cloud-tethered gadget. ESPHome is the tool that makes that joy repeatable. You describe a device — its WiFi, its sensors, its outputs — in YAML, ESPHome compiles real C++ firmware, flashes it onto an ESP32 or ESP8266, and the device shows up in Home Assistant automatically with no cloud, no app, and no telemetry leaving your house. I’ve built temperature monitors, soil moisture sensors, a letterbox-open detector, and a CO₂ meter this way, and every one was easier than wiring up the equivalent off-the-shelf product.

Esp32 - Tag - vo.rs

ESPHome: Building Custom Sensors for Home Assistant