I am totally new to this so please bear with me.
I have a piece of equipment at work that has an audible alarm and alarm port. From what I understand, it's a standard, two-wire dry contact that is OPEN when the audible alarm is off (no alarms or silenced alarms) and CLOSED whenever the audible alarm is activated. It does not have voltage i can detect in either state (alarm or not) I confirmed the system closes when the alarm is on by measuring the resistance using the ohm meter.
My question is: would it be possible to detect the alarm, and via wifi relay the alarm notification thru text, email, tweet?
My very limited understanding of arduino says...maybe.
This is how i think it might be done using an arduino uno, wifishield and voltage sensor module I'd have to do something like this: 1 have some low voltage applied to the alarm port 2 monitor voltage using one of those voltage sensor module 3 if circuit closes (alarm), the voltage increase is detected 4 if voltage increases: have a command send a message thru wifi to email address, tweet....
Is this more or less how it could be done? or is this a completely wrong approach?
I have been reading a lot, but have not come up with a real answer yet.