Hopefully someone can help me with a little project I've started on. I'm not happy with any available home security systems and have decided to build my own. I have a bunch of Arduinos around, why not use one!
So, I decided on using some Xbee modules and was going to build my own sensors. But I found the discontinued Eaton Home Heartbeat uses Zigbee powered sensors and are nicer/cheaper than I can build on my own. I purchased a door sensor, and a motion sensor from a seller on ebay and cracked them open. They have a Mega64L and an Ember EM2420 IC on the board.
I would like to connect to UART on the Eaton sensor module to read the configuration of the zigbee (PAN ID, Mode, Keys etc) So I can get my Xbee module on an arduino to receive and process the events from the sensors. I powered the sensor from the 3.3v off an Arduino duemilanove and then removed the atmel 168 on the arduino. According to the Mega64L datasheet the rx/tx are pins 2 and 3 so I wired them to rx/tx pins on the arduino.
I get no love with this setup, No serial data, nothing when I send '+++'. Can anyone point me in the right direction? I'm thinking buying a freakduino to sniff the traffic over the air, but that just adds cost to my project.