WROOM ESP32 Wifi Based Microcontroller Development Board is also an open-source IoT platform. It uses Lua script and a lot of open-source projects, such as lua-cjson, and spiffs. It contains firmware that can run on ESP32 WiFi SoC chips, and its hardware is based on ESP-32S modules. The ESP32 is a WiFi + Bluetooth chip developed by Shanghai Espressif, which aims to provide an access network for embedded products.

The development board maintains the classic NodeMCU 1.0 design, with the I / O pins placed on either side of the board, which provides a more straightforward setup and breadboard use. Using a breadboard for development can simplify the use of this module by making use of both sides of the standard pin.

Open source, interactive, programmable, intelligent & straightforward, plus containing WIFI + Bluetooth hardware makes the NodeMCU ESP-32S a great little board to keep in your toolkit.