Device recomendation

Discussion in 'The Projects Forum' started by cheypr, Apr 12, 2013.

  1. cheypr

    Thread Starter Active Member

    Oct 13, 2009
    34
    0
    Hi,

    I'm working on a security system but I'm not sure about what device to use. The system should work this way. I have a control unit at a place and a person with a tag. If the person walks out of range from the control unit at an approximate distance of 15 feet the alarm should be triggered.

    I was thinking to use an RFID with a microcontroller butIm not sure about the circular range and the distance. I was reading about an 915 MHz RFID to deal with the distance.

    I need some advice here. Thanks 4 your replies :cool:.
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    RFID wouldn't work. You need Bluetooth.
     
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  3. cheypr

    Thread Starter Active Member

    Oct 13, 2009
    34
    0
    OK, so with a bluetooth I can trigger an alarm if the person walks out of range, but how does the bluetooth can do that? I need to understand it to know how to interface it to a microcontroller or micprocessor.
     
  4. JohnInTX

    Moderator

    Jun 26, 2012
    2,348
    1,029
    There is discussion about a similar project in this thread. Maybe some help there.

    As MrChips said, it uses bluetooth.
     
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  5. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,575
    230
    Google: child luggage proximity alarm

    Ken
     
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  6. cheypr

    Thread Starter Active Member

    Oct 13, 2009
    34
    0
    Can anyone explain this to me. what does the values 0xXXX or 0xXX mean?
    [​IMG]
     
  7. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    If you don't understand how hexadecimal is typically represented, then this project is probably too advanced for you.

    I would say go with KMoffett's advice and get a product that is designed already...
     
  8. cheypr

    Thread Starter Active Member

    Oct 13, 2009
    34
    0
    so basically it means the actual value or range of values for each of those parameters.

    for the connection_handle paramter should be a hex type value of 0xXXX in the range: 0x0000-0x0EFF

    but for RSSI_Read Command succeeded parameter its a specific value: 0x00

    Am I correct?
     
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