The Pretzelboard is a low cost yet powerful IoT WiFi-Board, offering a versatile learning and teaching platform. It nicely combines an Arduino NANO and an ESP8266 Wi-Fi module.
This freely programmable development board is easy-to-use, for example to control your lights at home, your LEGO Robots and many other wireless projects.
The Arduino IDE provides the simplest way of programming the board.
As an example, this video shows how easy it is to use a Pretzelboard in your wireless home network, to control a LED from your smartphone, with a button on a webpage. The code mainly consists of easy to use AT-commands.