Franzis 50157 internet of things maker kit franzis 9783645501576 the franzis internet of things maker kit gets you off to a flying start with your next or first iot project with its arduino compatible pretzel main board a range of useful components and a comprehensive tutorial manual the pretzel main board is an arduino nano compatible design which is linked via a serial channel to an esp8266 wireless module that has become the go to device for iot applications the included manual guide