The ESP32 is one of the most versatile microcontrollers out there, capable of Wi-Fi connectivity and, in the case of the original ESP32, full-on Bluetooth, too. However, nearly every ESP32 device can at least do Bluetooth Low Energy, allowing them to capture data from a wide range of smart devices. However, with a custom Home a**istant integration and ESPHome, we can turn a few ESP32s into a way to track the presence of devices, like Apple’s “Find My” network, but built for your home, instead.