Espressif ESP32-DevKitC-32E Development Board.

Used it for LED strings with WLED software program for Christmas light display.

I have no idea why this ESP32 board isn't the most popular on Amazon. It's priced competitively, and it's an official implementation straight from the manufacturer. Since its OEM, the board works perfectly out of the box, unlike some other ESP32 implementations from other companies. No soldering caps across EN/GND (HiLetGo ESP32 uploading issue) or 3.3/GND (KeeYees ESP32 wifi issue). The silkscreen is also printed on the top of the board like any same human being would want, as well as the bottom. The only caveat is that the picture is incorrect like another review has said. This board uses the WROOM chip with the 4 MB memory, not the 8 MB of the WROVER chip. The model is correct though.

This is a blue tooth interface, but much more. It is a development kit for dirt cheap. It has a powerful processor, a low power processor, a blue tooth interface and a wi-fi interface. The processor has A/Ds, D/As, PWM ports, digital inputs, digital outputs, timers and a USB interface. This $10 module has it all.

I've been having a great time with this ESP32-Wroom-32e development card (use the DOIT DevKit Arduino ESP32 card). I'm developing a bluetooth capture device for my homebrewing activities, but I can see so much more that can be done with this card.