thats what i meant. thank you for the reply. i was hoping that i could use only the rpi so there will no extra cost. but your idea is better than mine. i was just thinking if the server crasht that it wil auto reboot and that on that way there where no problems. but this watchdog / controller of i/o...

i want to make a alarm that you can control true a webpage. the webpage is been worked on but that 's not realy the problem. the GPIO have constantly been checked when the alarm is on. what happens when my server crasht ? i'm thinking about 3 solutions but do not know which i need to choose for secu...