Industrial, Building & Home Automation for Raspberry Pi

Raspberry Pi is one of the most popular platform for DIY Home Automation. It provides a complete Linux system, wireless connectivity, expandability, and low cost, but it needs help with the I/O. A typical project requires 8 to 16 relays for zone heating and cooling, 6 to 8 relays for irrigation, 8 relays for lighting. Reading the temperatures requires up to 8 analog inputs (Raspberry Pi has none). Six to 8 more analog inputs are needed for reading the soil humidity. Motion detectors and door and window sensors require 20 to 30 digital inputs. Off-the-shelf solutions are available, but the result will resemble a small jungle. The cost of all the components, not counting the Raspberry Pi, is over $200.

Mega-IO to the rescue. A stack of 3 Mega-IO expansion cards provides a compact and elegant solution, for under $100. Any I/O pin can be software configured to interrupt the Raspberry Pi, so you do not have to poll in time critical security applications. Everything can be controlled from the browser on your computer, tablet or smart-phone. or you can wrinte your own interface in C, Python, or Codesys