So I have never used a Pi in the past but I find myself in a circumstance where I may have a genuine use for one. I am establishing a craft brewery and using PID temperature controllers. These controllers have alarm points that I actually wish to use if possible.
Physically, the temperature controller has 3 contacts, call them A, B and C. A & B are connected electrically while no alarm is sounding. When the alarm sounds the contacts change to A & C.
So could I use a break in circuit or a connection in circuit between pins on the PI to trigger an action in the PI? Say sending a simple - predefined email via a wifi module? I only need to listen for alarms on 5 controllers so I am assuming I would need 10 pins on the PI and I think there are enough for that?
Now I would have of course used the forum's search function but I honestly have no idea what to search for I am that much of a noob. So apologies in advance!