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 ESP32-H2, ESP32-H21 and ESP32-H4 are all low-power Espressif chips built around Bluetooth LE + IEEE 802.15.4 rather than Wi-Fi. The H2 is still the safest choice today for mature boards, Arduino support and proven Thread/Zigbee development. The…
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…
Best ESP32 for Home Assistant and ESPHome: choose C6 for most smart-home nodes, S3 for BLE/voice/display projects, C3 for budget and C5 for 5 GHz.