Quick Summary (TL;DR):The HLK-LD2410 is one of the best low-cost mmWave sensors for Home Assistant because it can detect both moving people and very small/stationary human motion, but its default settings are intentionally broad and can create false presence from…
Quick Summary (TL;DR):You can build a proper Home Assistant voice assistant satellite with ESP32-S3 + ESPHome using an I²S microphone such as the INMP441 and an I²S amplifier such as the MAX98357A. The ESP32-S3 listens for an on-device wake word…
Quick Summary (TL;DR):The DS18B20 is one of the best sensors for measuring several temperatures with one ESP32 because every probe has a unique 64-bit 1-Wire address and multiple devices can share a single DATA GPIO. The hardware looks deceptively simple,…
Quick Summary (TL;DR):The HLK-LD2450 becomes much more useful in Home Assistant when you stop treating it as a simple presence sensor and start using its X/Y coordinates and three configurable rectangular zones. With current ESPHome, the LD2450 can expose up…
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):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…
For most ESP32 and Home Assistant projects, the SHT40 remains the best-value choice. The SHT41 is essentially a tighter-tolerance SHT40: both have the same typical ±1.8% RH and ±0.2°C accuracy, but the SHT41 guarantees substantially better worst-case humidity accuracy across…
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…
