https://www.xda-developers.com/i-built-multimodal-esp32-powered-presence-sensor/
I built a ghost-proof ESP32-powered presence sensor and here’s how it works
powered presence sensorbuilt
https://www.xda-developers.com/built-esp32-powered-presence-sensor-bluetooth/
I built an ESP32-powered presence sensor using only Bluetooth, here's how it works
I can now detect when I enter a room, using just an ESP32 and ESPHome.
powered presence sensorbuilt