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Basic stamp communicating 10mile+ away from one more BS2 — Parallax Forums

Basic stamp communicating 10mile+ away from one more BS2

Casey GrossCasey Gross Posts: 14
edited 2010-02-16 16:32 in BASIC Stamp
what kind of transmitter would i need and how could i use it?

I know its an big question but i need to know.

Comments

  • stamptrolstamptrol Posts: 1,731
    edited 2010-01-11 01:38
    ·Need more details for a solid answer.

    ·But, Digi makes great radios that are good for several times that distance. Check out their XTend line.

    They are industrial quality and priced accordingly.

    ·Cheers,



    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
  • Casey GrossCasey Gross Posts: 14
    edited 2010-01-11 02:23
    can they be coded easily with the bs2
  • stamptrolstamptrol Posts: 1,731
    edited 2010-01-11 11:53
    Again, without knowing more about what you want to accomplish, I'm just guessing.

    But, if you want to send/receive serial data over several miles, the Digi radios will do it, if you have the antennas properly situated.

    Go to the Digi site and check out their products.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
  • stephenwagnerstephenwagner Posts: 147
    edited 2010-01-13 13:19
    If you have an amateur radio license, you can try this. ·If not substitute an FSR radio.

    http://forums.parallax.com/showthread.php?p=759557

    I hope this helps.

    SJW
  • kf4ixmkf4ixm Posts: 529
    edited 2010-01-13 13:31
    check out the new xbee modules parallax is getting ready to release.
    http://forums.parallax.com/showthread.php?p=870085
    ·
  • Jimmy_RuJimmy_Ru Posts: 8
    edited 2010-02-02 19:09
    The DNT2400 or DNT900 might fit your design.
    http://www.rfm.com/products/oem_standalone.php


    They are new to the market and propriety fhss data modems.
    They fall under unlicensed radio fcc limits.
    The development costs might be high but for unit price and capability nothing else compares.
  • hover1hover1 Posts: 1,929
    edited 2010-02-02 20:43
    The Parallax products top out at about 1 mile LOS. He was looking for 10 miles which I don't think the Parallax products can do.

    Jim
    kf4ixm said...
    check out the new xbee modules parallax is getting ready to release.
    http://forums.parallax.com/showthread.php?p=870085
  • kevin asatokevin asato Posts: 4
    edited 2010-02-16 05:13
    Hmm. Just reading through this thread as I have not read through in a while. I do feel that clarifications are in order -

    FRS and GMRS radios are not allowed to transmit data! These are VOICE only services. If you wish to transmit DATA on an unlicensed service, consider MURS radios (154MHz). There are 5 frequencies to use, I believe 2 frequencies are narrow band which will limit the data rate that can be used. And yes, these radios are more expensive than throwaway FRS radios. Other considerations would be to use Part 15 devices in the 900MHz and 2.4GHz bands with the appropriate antennas for distance. An important consideration may also be to mount the radios as close to the antennas as possible to minimize transmission line losses.

    As far as maximum transmission rates for the amateur 2 meter band, it is limited to 19.2K baud. This is governed by law and not maximum bandwidth of the 2 meter allocation. 56K is allowed on the amateur allocations above 222MHz although operation on the 440MHz band is on shaky grounds in parts of Northern California and Maine due to the Air Force having higher priority to the frequency allocation.

    73,
    kevin
    kc6pob
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2010-02-16 06:00
    I believe the FRS regs make an exception for GPS location data. But as long as the communication is non-commercial, it's easy enough to get an amateur technician-class license, which gives you a lot more latitude.

    -Phil
  • sylvie369sylvie369 Posts: 1,622
    edited 2010-02-16 11:42
    Phil Pilgrim (PhiPi) said...
    I believe the FRS regs make an exception for GPS location data. But as long as the communication is non-commercial, it's easy enough to get an amateur technician-class license, which gives you a lot more latitude.

    -Phil
    To be clear: a lot more latitude in choice of radios/frequencies, though not in how you use FRS. Right?
    That is, having a tech license does not entitle you to use FRS for (non-GPS) data. It does entitle you to use 2 meters, as in Ken's project.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2010-02-16 16:08
    silvie369 said...
    To be clear: a lot more latitude in choice of radios/frequencies, though not in how you use FRS. Right?
    Right. Hams cannot use FRS radio frequencies under their licenses. They have their own frequency bands to use, and there are regulations governing that use. But the restrictions are fewer than those governing FRS.

    -Phil
  • Clock LoopClock Loop Posts: 2,069
    edited 2010-02-16 16:32
    Aerocomm sells 900mhz modules that allow serial programming.

    They even have a program for the PC that lets you program the aerocomm module through any serial connection. (usb to serial devices)

    I have two of these: and using a dual port usb ftdi device I was able to establish a 900mhz link between them through my two com ports on the same computer using the software they provided me with.

    lairdtech.thomasnet.com/item/910mhz-modules/ac4490-transceivers/ac-4490-1000m?&seo=110

    This is the higher end of radio modules. DES encryption, full serial interface(115200baud, depending on radio link)
    This module claims a range of 20 miles and a wattage of 1000mW, approx 700ma power consumption.
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