I'm trying to control a computer using my Pi. I have two computer. Both of them and my Pi connected to my ethernet modem. Lets say the Pi cant ping to computer A, it will automatically switch on computer B. My current plan is that i want to plug in cable to the pin that control the computer power off/on switch on the computer motherboard. I dont want to use the method wake-up on LAN method
Currently i have Piface Digital 2, PiFace Relay and 8ch SainSmart Relay. Which hardware should i go with in order to control the computer?