Member Since: November 18, 2010

Country: United States

  • OK, the plan: wireless motion sensors.<br />
    the sensors I'd like to use (motion sensor) is depicted in the following youtube video:<br />
    http://www.youtube.com/watch?v=H_3q-mO5djs<br />
    they are using the sensor with a USB module I'd rather use it with the TX mentioned here. so here are the questions:<br />

    1) the sensor has a basic relay that can be either open or closed on detection. could i (taking in consideration of the voltages, induction, what not) hook it to the data line and assuming i have a avr mcu on the RX side read that there is a either an on or off value (some glitches due to noise)?<br />

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    2) looking at either the RX or TX, i do not see any information on the "type" of communication that occurs "in the air", is there anything while transmitting that stops me from interjecting data/garbage (by another identical TX device) like handshaking, etc.. ?<br />

    <br />

    3) assuming the answer to #1 is "what goes in is what you get out" and #2 is "take your turn or over talk": can i have multiple RX devices transmit at different times but when i transmit at the same time it OR's together as a result?<br />

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    4) if it looks like this is a bad idea (not related to how i speak but my intent), is there any good links/sites that i should look at to link an existing cheap motion senor device to a computer (win32/64)? the device i had in mind is: Voice Alert System 6 Annunciator System (found on amazon), its able to handle 6 devices, and alert the house hold with LEDs and sound. I'd rather be able to send myself an email when I'm not around.<br />

    <br />
    thanks in advance.

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