ITEAD Intelligent Systems Co., LTD, also called Sonoff, is a Shenzhen based PCB fabricator and PCBA service provider. As is usual, they offer not only fabrication and assembly services, but also host a market place, the “IMALL” for boards sourced inexpensively in China or designed in-house. They also have a blog with over 450 posts dating back to 2010 that used to contain articles about things like hacking a Saleae Logic Analyzer but now is mostly about smart homes, IoT and stock photos.

The purchase price for whatever it was I purchased (as of the writing of this section, I still haven’t received confirmation that the order was for 1 or 10 boards), was [...]