The PiSaint 1 was a hit and weuse them for more than just Sous Vide (<a href="https://hackaday.io/project/5533-sous-vide-cooker-and-more" target="_blank">https://hackaday.io/project/5533-sous-vide-cooker-and-more</a>) or home automation. Since the current version 1 found it&apos;s way into BitCoining Server ;) and other things we needed to create a new version (to much soldering and crimping). The version 2.0 is now directly connected to the GPIO of the Raspberry and the SainSmart relay we also added a micro USB connector to easily connect the 5V power supply. For the GPIO we used stackable &quot;extensions&quot; to allow other applications to be connected as well.