The magnetic alarm uses the built-in HALL sensor to detect the presence or absence of a magnetic field. This program sends an alert and lights a LED while the SiB has LOST contact with a magnet.

PROG hallmon
WAKEHALL 1s 10
IMTO 12345551234 ALARM! ALARM!
WA RED 100 ; red light on
DL 10s
WA RED 1023 ;red light off
LOOP

TO SUBMIT THIS PROGRAM:
First, send MODE SID to your SiB, as this is a SID program. It is not activated by the button press but rather by a timed sensor event.
Next, send the above program in an IM to your SiB, and press your SiB to receive the program.
Finally, place your SiB against the alarm magnet!