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Satellite communications via RS232 connecti on — Parallax Forums

Satellite communications via RS232 connecti on

ArchiverArchiver Posts: 46,084
edited 2000-10-08 16:29 in General Discussion
RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connection

This technology sure sound very interesting. How does this work and where does one use this communication to the satellite.

Please shower your light on to this dumb brains of mine [noparse];)[/noparse]


nagi

Original Message

From: gsynergy@pacbell.net [noparse]/noparse][url=mailto:gsynergy@pacbell.net]mailto:gsynergy@pacbell.net[/url
Sent: Saturday, October 07, 2000 1:44 PM
To: basicstamps@egroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connection


--- In basicstamps@egroups.com, jonwms@a... wrote:
> In a message dated 10/7/00 1:23:57 PM Central Daylight Time,
> gsynergy@p... writes:
>
> > Hello Everybody,
> >·
> >· I would like to use a BS2 and the serial connection on a Board
of
> >· Education to send preprogrammed messages and commands via a
satellite
> >· modem.· The modem uses RS422 (DB25 connector) so I purchased a
RS232 -
> >·· RS422 port powered converter (B&B Electronics part # 422LP9TBN
> >· www.bb-elec.com).
> >·
> >· I have successfully sent the following commands via PC
HyperTerminal:
> >·
> >· <enter>
> >· echo off <enter>
> >· send gps fix <enter>
> >·
> >· I can monitor the fix arriving at the ground station via telnet.
> >·
> >· I have also successfully programmed the following into the BS2
and
> >· observed its execution via HyperTerminal.
> >·
> >· 'Send text via sat terminal test
> >·
> >· loop:
> >·· if in4=1 then xmit· 'in4 is keypad - transmit command when
> >· PIN is entered
> >·· goto loop
> >·
> >· xmit:
> >·· serout 16,16468,1000,[noparse][[/noparse]13,"echo off",13,"send gps fix",13]
> >·· pause 5000 'Allow keypad to reset
> >·· goto loop
> >·
> >· The problem is when I connect the BS2 to the Sat Modem the fix
is not
> >· transmitted.
> >·
> >· Thank you for your assistance.
> >·
> >· Regards,
> >·
> >· Bob Landsfield
>
> Check the specs on your satellite modem.· You may need to add
pacing to the
> SEROUT command.· You never notice this when using Hyperterminal,
since humans
> -- no matter how fast they can type -- can't send characters to a
modem as
> fast as the Stamp can.
>
> -- Jon Williams
> -- Dallas, TX

Jon:

I searched the modem's API and have not found the spec you
mentioned however, I did include a 1000 milliseconds in the orginal
code.

serout 16,16468,1000,[noparse][[/noparse]13,"echo off",13,"send gps fix",13]

Do you think there should be more time?

Thanks for your assistance.

Bob Landsfield

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-10-07 23:01
    --- In basicstamps@egroups.com, nags <nags@c...> wrote:
    > This technology sure sound very interesting. How does this work and
    where
    > does one use this communication to the satellite.
    >
    > Please shower your light on to this dumb brains of mine [noparse];)[/noparse]
    >
    >
    > nagi


    Nagi

    The technology is based on using an M-Sat, which is a geosynchronous
    satellite that yields coverage for North America, Central America,
    the Caribbean, and part of South America. The system is capable of
    transmitting and receiving "packet-switched data" (i.e. text based
    messages.) This is the system used by major trucking companies to
    track their trucks and send text messages to the drivers.

    Regards,

    Bob Landsfield
  • ArchiverArchiver Posts: 46,084
    edited 2000-10-08 16:20
    RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti on

    You mentioned about using a modem to send / receive these messages. Can you please give me more details on that ?

    My car has a GPS receiver that I had installed a year ago. It works great!! But, I want to be able add something in my car so that, people at home can trace where I'm on the roads. Seems like this technology will allow me to do that. How do I go abt?

    Please advise.

    thanks a lot in advance
    nagi





    Original Message

    From: gsynergy@pacbell.net [noparse]/noparse][url=mailto:gsynergy@pacbell.net]mailto:gsynergy@pacbell.net[/url
    Sent: Saturday, October 07, 2000 5:02 PM
    To: basicstamps@egroups.com
    Subject: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti
    on


    --- In basicstamps@egroups.com, nags <nags@c...> wrote:
    > This technology sure sound very interesting. How does this work and
    where
    > does one use this communication to the satellite.
    >
    > Please shower your light on to this dumb brains of mine [noparse];)[/noparse]
    >
    >
    > nagi


    Nagi

    The technology is based on using an M-Sat, which is a geosynchronous
    satellite that yields coverage for North America, Central America,
    the Caribbean, and part of South America.· The system is capable of
    transmitting and receiving "packet-switched data" (i.e. text based
    messages.)· This is the system used by major trucking companies to
    track their trucks and send text messages to the drivers.

    Regards,

    Bob Landsfield
  • ArchiverArchiver Posts: 46,084
    edited 2000-10-08 16:20
    Hams do this all the time. Look up APRS on the Web. If you had a radio
    service that was legal to use for this purpose, there is no reason it would
    have to be on the ham bands. But, it is probably illegal to use it on, say,
    27MHz CB (in the US). Not sure about Class E (the UHF business band)?

    In particular look at http://www.findu.com/

    Regards,

    Al Williams
    AWC
    * Expand your Stamp I/O: http://www.al-williams.com/awce/pak3.htm

    Original Message
    From: nags [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=iokv3DD3-9MsLHUOIEXh9v7bKPMXG3Lg3s_gM9h65gU-4zE7wxzAG_9YjXMH7wM5jFQlrP1RrMl-jL3m]nags@c...[/url
    Sent: Sunday, October 08, 2000 10:21 AM
    To: 'basicstamps@egroups.com'
    Subject: RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti
    on


    You mentioned about using a modem to send / receive these messages. Can you
    please give me more details on that ?
    My car has a GPS receiver that I had installed a year ago. It works great!!
    But, I want to be able add something in my car so that, people at home can
    trace where I'm on the roads. Seems like this technology will allow me to do
    that. How do I go abt?
    Please advise.
    thanks a lot in advance
    nagi




    Original Message
    From: gsynergy@p... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=aPdDtfraA8annvKw2aO8rUDfiXf-kCVFPrcxgFe_C-OcsQgQQt2b7E6FF0Owjg3Hqs7qvOpvXHXQEyMs]gsynergy@p...[/url
    Sent: Saturday, October 07, 2000 5:02 PM
    To: basicstamps@egroups.com
    Subject: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti
    on


    --- In basicstamps@egroups.com, nags <nags@c...> wrote:
    > This technology sure sound very interesting. How does this work and
    where
    > does one use this communication to the satellite.
    >
    > Please shower your light on to this dumb brains of mine [noparse];)[/noparse]
    >
    >
    > nagi


    Nagi
    The technology is based on using an M-Sat, which is a geosynchronous
    satellite that yields coverage for North America, Central America,
    the Caribbean, and part of South America. The system is capable of
    transmitting and receiving "packet-switched data" (i.e. text based
    messages.) This is the system used by major trucking companies to
    track their trucks and send text messages to the drivers.
    Regards,
    Bob Landsfield
  • ArchiverArchiver Posts: 46,084
    edited 2000-10-08 16:23
    It's known as APRS. Automated Packet Reporting System.. currently, there is
    software for laptops to do this... I'm sure it could be done with a basic
    stamp...

    David Tomaschik, KF4MDV
    kf4mdv@a...
    http://www.cosmicsys.com


    >
    Original Message
    > From: Al Williams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mfi7Bl6reNFG0wFntTJkWViXYjDvoPrp9J-F0jDMYibS-1RgqdaPvsl8SE-zshG73RFhIdWAiOsL]alw@a...[/url
    > Sent: Sunday, October 08, 2000 11:20 AM
    > To: basicstamps@egroups.com
    > Subject: RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232
    > connecti on
    >
    >
    > Hams do this all the time. Look up APRS on the Web. If you had a radio
    > service that was legal to use for this purpose, there is no
    > reason it would
    > have to be on the ham bands. But, it is probably illegal to
    > use it on, say,
    > 27MHz CB (in the US). Not sure about Class E (the UHF business band)?
    >
    > In particular look at http://www.findu.com/
    >
    > Regards,
    >
    > Al Williams
    > AWC
    > * Expand your Stamp I/O: http://www.al-williams.com/awce/pak3.htm
    >
    >
    >
    Original Message
    > From: nags [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=HYgJ1KJfow_zXQQjHYbQodQPkgCBrOU8hwAXRb5dBeTrrZGTuslAE2pkPNdSnwYsbdWEfrjQ_QUI]nags@c...[/url
    > Sent: Sunday, October 08, 2000 10:21 AM
    > To: 'basicstamps@egroups.com'
    > Subject: RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via
    > RS232 connecti
    > on
    >
    >
    > You mentioned about using a modem to send / receive these
    > messages. Can you
    > please give me more details on that ?
    > My car has a GPS receiver that I had installed a year ago. It
    > works great!!
    > But, I want to be able add something in my car so that,
    > people at home can
    > trace where I'm on the roads. Seems like this technology will
    > allow me to do
    > that. How do I go abt?
    > Please advise.
    > thanks a lot in advance
    > nagi
    >
    >
    >
    >
    >
    >
    Original Message
    > From: gsynergy@p... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=dwUS9ouDg6b1n0gwLqX9QesRM-7E1yWIZBcwvXb-caAwIu1sr4ET30WWko7YCktyFBBVA5mTOOIY3Qd_IikR]gsynergy@p...[/url
    > Sent: Saturday, October 07, 2000 5:02 PM
    > To: basicstamps@egroups.com
    > Subject: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti
    > on
    >
    >
    > --- In basicstamps@egroups.com, nags <nags@c...> wrote:
    > > This technology sure sound very interesting. How does this work and
    > where
    > > does one use this communication to the satellite.
    > >
    > > Please shower your light on to this dumb brains of mine [noparse];)[/noparse]
    > >
    > >
    > > nagi
    >
    >
    > Nagi
    > The technology is based on using an M-Sat, which is a geosynchronous
    > satellite that yields coverage for North America, Central America,
    > the Caribbean, and part of South America. The system is capable of
    > transmitting and receiving "packet-switched data" (i.e. text based
    > messages.) This is the system used by major trucking companies to
    > track their trucks and send text messages to the drivers.
    > Regards,
    > Bob Landsfield
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2000-10-08 16:29
    RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti on

    Thanks Al and Bob

    nagi

    Original Message

    From: Al Williams [noparse]/noparse][url=mailto:alw@al-williams.com]mailto:alw@al-williams.com[/url
    Sent: Sunday, October 08, 2000 10:20 AM
    To: basicstamps@egroups.com
    Subject: RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232
    connecti on


    Hams do this all the time. Look up APRS on the Web. If you had a radio
    service that was legal to use for this purpose, there is no reason it would
    have to be on the ham bands. But, it is probably illegal to use it on, say,
    27MHz CB (in the US). Not sure about Class E (the UHF business band)?

    In particular look at http://www.findu.com/

    Regards,

    Al Williams
    AWC
    * Expand your Stamp I/O: http://www.al-williams.com/awce/pak3.htm


    Original Message

    From: nags [noparse]/noparse][url=mailto:nags@crosscity.com]mailto:nags@crosscity.com[/url
    Sent: Sunday, October 08, 2000 10:21 AM
    To: 'basicstamps@egroups.com'
    Subject: RE: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti
    on


    You mentioned about using a modem to send / receive these messages. Can you
    please give me more details on that ?
    My car has a GPS receiver that I had installed a year ago. It works great!!
    But, I want to be able add something in my car so that, people at home can
    trace where I'm on the roads. Seems like this technology will allow me to do
    that. How do I go abt?
    Please advise.
    thanks a lot in advance
    nagi





    Original Message

    From: gsynergy@pacbell.net [noparse]/noparse][url=mailto:gsynergy@pacbell.net]mailto:gsynergy@pacbell.net[/url
    Sent: Saturday, October 07, 2000 5:02 PM
    To: basicstamps@egroups.com
    Subject: [noparse][[/noparse]basicstamps] Re: Satellite communications via RS232 connecti
    on


    --- In basicstamps@egroups.com, nags <nags@c...> wrote:
    > This technology sure sound very interesting. How does this work and
    where
    > does one use this communication to the satellite.
    >
    > Please shower your light on to this dumb brains of mine [noparse];)[/noparse]
    >
    >
    > nagi


    Nagi
    The technology is based on using an M-Sat, which is a geosynchronous
    satellite that yields coverage for North America, Central America,
    the Caribbean, and part of South America.· The system is capable of
    transmitting and receiving "packet-switched data" (i.e. text based
    messages.)· This is the system used by major trucking companies to
    track their trucks and send text messages to the drivers.
    Regards,
    Bob Landsfield
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