Case for ESP32 bluetooth proxy including external aerial

This is an open backed case designed to fit over a generic 5W USB UK plug and houses an ESP32-WROOM-32U WROVER. The box is deliberately wide and has a cutout so it can sit over a UK 13A socket switch. I flashed mine with ESPHome bluetooth proxy. I find my reception is slightly better than an ESP32 with built-in aerials but YMMV. Positioning close to power cables hidden in the wall may also not be a good idea but it works for me and keeps everything in one place rather than having a separate USB plug/cable/device-in-a-box.

The plug surround is reasonably tight. It's not guaranteed to work with other USB chargers though and they all seem to vary a bit. Works perfectly with the ones I list (unless they change the design). You can also put a bit of double sided tape on the back of the plug to hold it in but I find I don't need to. I also want to easily remove for updates. Depending how well tuned your printer is will affect the fit. On my very well tuned Voron 2.4, it fits like a glove.

Parts I used:

ESP32
https://www.aliexpress.com/item/1005008209898668.html

USB 5w generic charger
https://amzn.eu/d/1FlWuoV

USB super flat cable
https://www.aliexpress.com/item/1005005978243043.html
This can be confusing as the re are so many options - get the 10cm AMRI-V8LE which should work as long as your ESP32 has micro USB and not USB-C