As with other home lab experiments, there are tons of methods to convert an ESP32 into a Bluetooth Proxy. Since I want to use it with my Home Assistant server, I used the ESPHome add-on method.

Take the ESP32-CAM, a board that started appearing on the market in early 2019. On paper, the thing is amazing: an ESP32 with support for a camera and an SD card, all for less than $10.

The Bluetooth Low Energy stack consumes a lot of RAM on the ESP32 as well, so you may run into issues when adding this to your already-in-use devices.

The PCB holds an ESP32-PICO-D4 which is operating as a standard Bluetooth HID controller for maximum compatibility with modern systems.

Arduino has introduced a Nano shaped board with a Wi-Fi and Bluetooth LE capable Espressif’s ESP32-S3 microcontroller, supporting it with the Arduino IDE and MicroPython. “Beginners can explore in an ...