ESP-IDF Survival Guide

I got myself that ESP32-DevKitC V4 from Espressif. I like that it does both Classic Bluetooth (BT - ER/BDR) and Bluetooth Low Energy (BLE). It uses the ESP-IDF esp32 target.

Com port Windows drivers

Before you can flash your board you will need to get the serial connection to work on your Windows PC.
I downloaded the latest CP210x Universal Windows Driver and unzip them.
Plug your board over USB and open Windows Device Manager you should easily find the malfunctioning device.
Right click on it and select Update driver then point it to the driver directory you just downloaded.

Bluetooth Host

To connect a Bluetooth device to it you should take a look at the Bluetooth HID Host API and that ESP-IDF BT/BLE HID Host Demo.