ESP32-WROOM32 and ESP32-WROVER is certified module from Espressif. It can be installed and sell in some countries.

Below is ESP32-WROOM32.

And some development kits are on sales. Below is ESP32-DevKitC from Espressif.

The difference between ESP32-WROOM32 and ESP32-WROVER is memory size.

How to use with obniz

Install obnizOS for ESP32 and write a DeviceKey you generate to your ESP32-WROOM32 or WROVER. Then you can control its IOs from the internet.

See obnizOS quick start.