rf module

Archiver · 2001-02-16 01:25

hello

I need help on how to send and receive data by using transceivers.
my system consists of sending data through the pc and then send it wireless
to the basic stamp. Im going to use to parallax RF modules to send and
receive data. One at the computer end and other at the microcontrolller end.
Does any body know how to do this?
any programs or examples that I can look at?

thank you.

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Archiver · 2001-02-16 02:00

Check www.rentron.com They have what you are looking for.

Original Message

From: "che guevara" <mercuryhg7@h...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, February 15, 2001 8:25 PM
Subject: [noparse][[/noparse]basicstamps] rf module

> hello
>
> I need help on how to send and receive data by using transceivers.
> my system consists of sending data through the pc and then send it
wireless
> to the basic stamp. Im going to use to parallax RF modules to send and
> receive data. One at the computer end and other at the microcontrolller
end.
> Does any body know how to do this?
> any programs or examples that I can look at?
>
> thank you.
>
> _________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
>
>
>
>
>

Archiver · 2003-03-01 13:33

I am looking for a transmitter and receiver module to use with my stamps. I
would like to communicate with my robot using these. In the past I used the
RF module from Parallax, model TXAM303B form DVP, with eat success. This
where discontinued a while ago. In looking at what is available from
Parallax my choices seem limited. The modules are bigger and more clumsier
than their old ones. Are these the stamp standard or are there other choices
out there?

Thank you in advance

Tim

[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver · 2003-03-01 14:01

In a message dated 03/01/2003 08:35:07 Eastern Standard Time,
Trkeenan@a... writes:

> Are these the stamp standard or are there other choices
> out there?
>
> Thank you in advance
>
>

Take a look at the TWS/RWS modules at www.rentron.com. I have two of these
and they work very well. Much less expensive than the Parallax units, but
they require a 13" wire antenna, whereas the Parallax modules have the
antenna on the board. Still a very satisfactory unit.

Sid Weaver
W4EKQ
Port Richey, FL

[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver · 2003-03-01 14:57

> In the
> past I used the
> RF module from Parallax, model TXAM303B form DVP, with eat
> success. This
> where discontinued a while ago.

Tim:

Do you still have 'em?
If you do I'll give a few bucks for 'em - I'm interested in discovering the
differences between types. I have used the ones that Bruce sells, & RF
Digital's.
Each have their own little quirks.....

Chris

Archiver · 2003-03-01 15:15

rentron.com also has Linx modules (TXLC/RXLC). They work pretty good as
well. (I also got the whip antennas they sell). Generally if your looking
for distance for a hobby project it may be worth your while to get an
Amateur Radio License. With wireless the rule seems to be then longer the
range the higher the price (almost exponentailly).

My next wireless adventure will probably be with these:

Original Message

From: <Newzed@a...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, March 01, 2003 9:01 AM
Subject: Re: [noparse][[/noparse]basicstamps] RF Module

> In a message dated 03/01/2003 08:35:07 Eastern Standard Time,
> Trkeenan@a... writes:
>
>
> > Are these the stamp standard or are there other choices
> > out there?
> >
> > Thank you in advance
> >
> >
>
> Take a look at the TWS/RWS modules at www.rentron.com. I have two of
these
> and they work very well. Much less expensive than the Parallax units, but
> they require a 13" wire antenna, whereas the Parallax modules have the
> antenna on the board. Still a very satisfactory unit.
>
> Sid Weaver
> W4EKQ
> Port Richey, FL
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
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Body of the message will be ignored.
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>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

Archiver · 2003-03-01 15:17

Hit send before I was ready, sorry. This is the link for the units I am
trying next (the ones way down on the bottom)

http://www.laipac.com/products/wireless.htm

-Rob

Original Message

From: "Robert Staph" <rstaph@a...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, March 01, 2003 10:15 AM
Subject: Re: [noparse][[/noparse]basicstamps] RF Module

> rentron.com also has Linx modules (TXLC/RXLC). They work pretty good as
> well. (I also got the whip antennas they sell). Generally if your looking
> for distance for a hobby project it may be worth your while to get an
> Amateur Radio License. With wireless the rule seems to be then longer the
> range the higher the price (almost exponentailly).
>
> My next wireless adventure will probably be with these:

Archiver · 2003-03-01 15:50

Here are some others to look at;
http://www.datahunter.com/

Archiver · 2003-03-02 01:49

Hi there,

I was about to make a suggestion but then I saw the prices for the
Transceivers on the Laipac.com page... I am trying to convince
myself theres a mistake somewhere since I just bought a pair of
Super SCREAMER 900 Mhz modules at www.electowave.com, they were
around $400 USD! which sounded a bit crazy at first, yet I think
they are a bit more complex than the ones at laipac.

I have used them for a Kart telemetry system and they work pretty
good, transmission is continous throughout the whole course (linear
distance of about 900 ft). TX speed is 9600 baud, CRC seems to work
dandy...(something that helps prevent and detect errors while
transmiting and receiving). These are full duplex and the fact that
I bought the Super Screamer and not the Stamper (cheaper model)
makes them interactive, so you can determine the baud rate, protocol
and error detection routine. I think that something that is amazing,
and I find it very useful, is the fact that you can not only receive
or transmit data to your BS2, but also you can download a whole
program for your basic stamp from your computer!, even though your
BS2 is 500 feet away, under 1.1 G's and moving at 100 MPH!

I dont know if something simmilar can be done with the ones at
laipac.com, visit www.electrowave.com.

I found my pair of Wireless modems hard to set up since there are no
good instructions regarding how the setup for the Basic Stamp must
be done (you have to tell the modems that you want them for
programming a BS2), but it took me less than an hour to figure it
out... and also, I power mine with 6 AA batteries when I cannot use
the AC adapter, this works fine and batteries last a lot (NiMH 1300
mAh are the ones I use).

I have also used it in an interesting project: I connected a BS2p to
a GPS (eMap), used scratchpad RAM to extract useful information from
the NMEA string, then sent the formated data through the wireless
modem and into my laptop, I received the data using STAMPDAQ macro
for Excel, and used the data to create an X vs Y chart, showing
latitude and longitude coords. The BS2p + GPS + Wireless modem are
packed into a module.

The Excel graph shows the Real-time position of the module... as
long as you have GPS signal and you are not outside the limit of the
modems you can see where the module is, where has it been, if
someone moves it you see the trajectory of it, you can also extract
and send altitude, speed and heading information if necessary.

I hope you find this information useful.

Juan Pablo Angulo

Archiver · 2003-03-02 14:25

In a message dated 03/01/2003 7:03:11 AM Mountain Standard Time,
Newzed@a... writes:

> Take a look at the TWS/RWS modules at www.rentron.com. I have two of these
> and they work very well. Much less expensive than the Parallax units, but
> they require a 13" wire antenna, whereas the Parallax modules have the
> antenna on the board. Still a very satisfactory unit.
>

These module are much cheaper. You say they work very well. What
application are you using them for? Are you Using a BS2 and do you find that
you get good range 300' ?

Thanks

[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver · 2003-03-02 14:29

In a message dated 03/01/2003 7:57:00 AM Mountain Standard Time,
chris01@t... writes:

> Do you still have 'em?
> If you do I'll give a few bucks for 'em - I'm interested in discovering the
> differences between types. I have used the ones that Bruce sells, & RF
> Digital's.
> Each have their own little quirks.....
>

I have two sets that are wired to my robots. I am very happy with the range,
simple to use, and how long they have lasted. I am surprised that parallax
discontinued them and went with a more clumsy, larger, and less range unit.
At this time I plan on keeping my modules as my robot are designed around
them.

Tim

[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver · 2003-03-05 11:49

Based on this groups recommendation I purchased the RF modules, model
TXLC-434 / RXLC-434, from Reynolds Electronics. Does anyone have some sample
code they could share with me for stamp to stamp serial connection?

Thanks for all your help

Tim

[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver · 2004-07-08 03:35

In using the RF Modules (I am planning ahead), what happens when in
switch mode (page 9) you press two buttons at once ??

Is the transmitter receiver a one-button or are there a seven
combinations? I want to make sure that the signal is received and
want to use pin output instead of serial communication.

Thank you in advance,
Thad

rf module

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