I have a metal locking mailbox. I use the Dakota Alert UTDCR-4000 transmitter and receiver unit and I attached a magnet and switch (like the ones used on surface mount for alarm systems) on my mailbox. I ran a small (30 gauge wire) that is connected to the magnetic contacts and mounted the transmitter under the mailbox because I can't get an RF signal out from the metal box. The output from the Dakota receiver (relay contacts) is fed into an Arduino which is tied into my Homeseer system. When the mailbox is opened, the output of the Dakota alert triggers the Arduino and I have lights turn on in the house and Homeseer announces that the mail is here. I also use pushover plugin and I get alerts on my mobile device also. It would be easier if RFXCOM could decode the Dakota signals but it can't. This system works very well.
Ronnie
Ronnie
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