Data Transmission long distance

Discussion in 'Embedded Systems and Microcontrollers' started by cwojack, Feb 1, 2008.

  1. cwojack

    Thread Starter New Member

    Apr 8, 2007
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    I am new to this process and at 60 years old I am able to learn new things but I have a problem.

    I have a project that requires the transmission of an image, that was triggered by a specific event, a long distance. (aprox 30 miles) The line of site is fair to poor. The question is what products are available and should I use a single board PC. Also power is a consideration (I am sure that this is normal).

    Is there a simple way for me to learn how to program this or is there a open source app that will, with modification of course, do the job or some place I can find data transmission apps?

    I also need a fast high resolution image for identification purposes.

    Any Idea would be greatly appreciated.:confused:
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    What other parameters can you supply? By "line of sight", are we to imagine the mode of transmission is by microwave RF? Do we assume you can't send the image by landline, like the internet? And what constitutes "fast, high resolution" (what's the image size, DPI, and what is the minimum time to transmit the image?).
     
  3. cwojack

    Thread Starter New Member

    Apr 8, 2007
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    This could be in a hilly area with trees. Internet transmission would take place at a base receiving station that would be connected to the net.

    19200 bps or greater as the size of the image files could be rather large. The system with the camera would need to be able to store multiple images until they all are transmitted. Images would be taken from 60 to 150 ft and be able to capture data on a 5' X 7" sticker after plowing up the image.

    Chuck
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    Line of sight has nothing significant to do with a data transmission on the internet. The TCP/IP protocol will control the transfer of the image, in that case. 19.2 Kbits is a telephone modem speed - the net can handle over 1 Mbyte/sec, depending on your connection.

    "capture data on a 5' X 7" sticker after plowing up the image." is hard to interpret. You don't describe the camera, video or still. If it's still, then the image file can be reduced in size by quite a bit by using black and white rather than a color image.
     
  5. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
    1
    The simplest way I can think of is to run a FTP server from the point where you are snapping pictures. There are a ton of programs that function as a server. Then, you can set your recieve station to poll the server at intervals via a scripting language used for FTP browsers. Leapftp at www.leapware.com has a really easy scripting language that might be useful for this.

    What are you using to take pictures? Can these be dumped to a folder and their names incremented or time stamped? Is a constant connection acceptable?

    Steve
     
  6. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,652
    767
    Is that the target of the pictures to be taken? What if he explains more, before building solutions in the air?

    Is he going to implement a remot access control to Fort Knox? Or just to his ranch?
     
  7. cwojack

    Thread Starter New Member

    Apr 8, 2007
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    0
    Thanks for the reply.

    I don't have access to internet at this point it is too far from the access points. Also no supplied power.

    The sugestion of B/W is excelent. I am still looking for a image capture system that uses low power. no video is needed.

    Chuck
     
  8. cwojack

    Thread Starter New Member

    Apr 8, 2007
    4
    0
    Thanks for the reply.

    Polling is an option, what should I use at the camera location as processor, and are there any program examples that I can use or look at to capture the image and save it to a location fo ftp retreval.

    Don't know about the camera but it does not need to be video. someone sugested B/W. I am looking for how I can capture and save the data for future transmission:

    As you can see I am very new and I grately appreciate the help.

    Chuck
     
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