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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.…

We’ve covered temperature sensors (e.g., Govee) and mechanical actuators (e.g., SwitchBot). Now comes the most valuable “health layer” in a smart home: Indoor Air Quality (IAQ). A lot of “smart air monitors” push data over Wi-Fi and vendor apps. A…

SwitchBot is the king of retrofitting: it can press dumb buttons, pull curtains, and lock doors without replacing hardware. In Home Assistant, the BLE approach is popular with power users because it can be local, fast, and hub-free—but it’s also…

Govee BLE thermometers/hygrometers are cheap and surprisingly useful in Home Assistant—if the Bluetooth side is engineered properly. The integration itself is mostly UI-based today, but to make it robust (no dropouts, good range, usable automations) there are two places where…

“Car arrival detection” is one of the most useful automations you can build because it’s faster and more reliable than GPS when done properly. The idea is simple: This article shows a reliable setup using BLE + smart timeouts so…

This is the “works in real life” pattern: You end up with one “source of truth” entity you can use everywhere:binary_sensor.presence_home_final 1) Inputs you need A) BLE present (fast) This should be ON if any ESP32 Bluetooth Proxy sees your…