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…
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…
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,…
Quick SummaryThis guide shows how to connect an INA219 or INA226 current/voltage sensor to an ESP32 over I²C, configure it in ESPHome, and monitor battery/solar voltage, current, power and energy in Home Assistant (optional MQTT). Includes wiring, address scanning, calibration…
This guide shows how to wire a DHT22/AM2302 to an ESP32, set it up in ESPHome, and get temperature + humidity into Home Assistant (with optional MQTT). It includes the correct pull-up resistor, safe GPIO choices, recommended update intervals, and…
If you’re reading esp32.co.uk, you probably already have Home Assistant packed with ESPHome sensors, smart relays, and automations that look like a small engineering project. But let’s be totally candid: a smart home is useless if it takes 15 seconds…
If you’re reading esp32.co.uk, you probably already have Home Assistant stuffed with ESPHome sensors, smart relays, and automations that look like a small PhD thesis. But none of that matters if turning a light on takes 10–15 seconds of app-fumbling.…
The Sensirion SHT45 is one of the most accurate, stable sensors you can use for temperature and humidity monitoring. It is a true upgrade over common “good enough” sensors, especially in spaces where small changes matter such as a humidor,…
Building a reliable CO₂ monitor is one of the best “bang-for-buck” ESPHome projects. The Sensirion SCD41 is a true CO₂ sensor (photoacoustic sensing / PAS), not a “calculated eCO₂” VOC estimate, so it’s ideal for proper IAQ monitoring. Using MQTT…
We’ve monitored temperature and air quality. Now comes perimeter security. BLE smart locks are the “final boss” of Bluetooth in a smart home because they need a secure, encrypted, two-way connection. Sensors can drop a packet and you won’t care.…