ESP32 Sump-Pump and Flood Monitor with Home Assistant
Build an ESP32 sump-pump and flood monitor with ESPHome and Home Assistant. Track pump runtime, high water, leaks, power loss and failure conditions.
OpenTherm Gateway with ESP32 and Home Assistant
Build an ESP32 OpenTherm controller or inline gateway for Home Assistant. Monitor boiler modulation, temperatures, faults and control heating setpoints safely.
ESP32 Multi-Zone Heating Controller with ESPHome and Home Assistant
Build an ESP32 multi-zone heating controller with ESPHome and Home Assistant. Control room thermostats, zone valves and shared boiler demand safely.
ESP32 Smart Irrigation Controller with ESPHome and Home Assistant
Build a multi-zone ESP32 irrigation controller with ESPHome and Home Assistant. Covers 24V valves, pump/master valve control, rain lockout, soil moisture, adjustable run times and safe automation.
ESPHome to KNX via Home Assistant: Sensors and Switch States
Bridge ESPHome devices to KNX through Home Assistant: expose ESP32 sensor values and switch states, accept KNX commands, map DPTs correctly and avoid feedback loops.
ESP32 CT Clamp Energy Monitor for Home Assistant
An ESP32 + CT current clamp + ESPHome can monitor AC current without electrically connecting the ESP32 to mains voltage. ESPHome’s native ct_clamp component samples the CT waveform, calculates RMS current and exposes it directly to Home Assistant. For a…
ESP32 4-Wire PWM Fan + RPM in Home Assistant (2026)
A standard 4-wire PWM PC fan can be controlled from an ESP32 while its real rotational speed is returned to Home Assistant as RPM. The fan keeps its normal 12 V supply continuously connected, while the ESP32 generates the standard…
ESP32 Water Meter for Home Assistant (ESPHome 2026 Guide)
Turn a basic pulse-output water meter into a fully local Home Assistant sensor using an ESP32 and ESPHome. This guide shows wiring, pulse_meter setup, live flow rate, total consumption, Energy dashboard integration, daily and monthly usage tracking, and simple leak-detection…
ESP32 Smart Relay for Home Assistant (ESPHome)
This guide shows how to build a safe ESP32 smart relay (Shelly-style) for Home Assistant using ESPHome (optional MQTT). Includes correct wiring (low-voltage vs mains), relay module selection, GPIO “safe pins”, EMI/noise tips, and example ESPHome YAML for a reliable…
ESP32 PMS5003 in Home Assistant & ESPHome 2026
This guide shows how to connect a PMS5003 (PM2.5/PM10) particulate sensor to an ESP32 using UART, configure it in ESPHome, and display air-quality values in Home Assistant (optional MQTT). Includes wiring, safe GPIO choices, recommended update intervals, warm-up/duty cycling tips,…