Quick Summary (TL;DR):The safest and most universal way to add an ESP32 garage door opener to Home Assistant is to imitate the existing wall pushbutton rather than trying to control the motor directly. Use a dry-contact relay connected across the…
Quick Summary (TL;DR):The SGP40 and SGP41 are Sensirion metal-oxide gas sensors designed for indoor-air-quality monitoring with ESP32, ESPHome and Home Assistant. The biggest difference is simple: SGP40 measures VOC behaviour only, while SGP41 adds a second sensing pixel for oxidizing…
Quick Summary (TL;DR):If the project is specifically about measuring temperature and relative humidity as accurately as possible, the SHT45 is the clear winner: Sensirion specifies approximately ±1.0% RH and ±0.1°C typical accuracy, very low long-term drift, a fast digital I²C…
Quick Summary (TL;DR):An ESP32 can turn an RS-485 Modbus energy meter into a completely local Home Assistant energy monitor. For single-phase circuits, an Eastron SDM120-M/Modbus-class meter is one of the easiest DIN-rail choices; for three-phase, solar, EV charging or more…
Quick Summary (TL;DR):There is no single “best” ESP32 energy-monitoring method because the four common approaches solve different problems. A pulse reader is the cheapest and safest way to read whole-home energy from an existing utility meter; its accumulated kWh effectively…
Quick Summary (TL;DR):For most new Home Assistant + ESPHome projects in 2026, the ESP32-C6 is the best default choice: it is inexpensive, mature, supports 2.4 GHz Wi-Fi 6, Bluetooth LE and IEEE 802.15.4 for Zigbee/Thread, and has enough CPU and…
Quick Summary (TL;DR):The ESP32-C3 SuperMini is a tiny third-party ESP32-C3 board built around a 160 MHz single-core RISC-V processor with 2.4 GHz Wi-Fi, Bluetooth LE, native USB and usually 4 MB flash. On the common 16-pin layout, the easiest GPIOs…