Post by thread:[EE]: RS232 to RF

Hello PIClisters! Can anyone point me to a small finished module that would allow me to interface a handheld device that has a serial port via RF? The RF range is local (about 100 feet / 35 meters). Frequency would need to be appropriate for a U.S. control device. A little 9-pin rs232 box would be great. I've found a few RS232/RF solutions that are not so hand-held. My specific application is for a Palm/Handspring device. -Rob -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Try http://www.abacom-tech.com - they've got some RS232 transceivers on US license-free frequencies, last I checked. I don't think they have DB-9s on them, but that would be an easy add-on. Their located in Canada - I think that they get their modules from Radiometrix in the UK, who have other distributors as well. -Randy Glenn PICxpert-at-home.com PICxpert-at-picxpert.com PICxpert-at-yahoo.com Randy_Glenn-at-tvo.org http://www.picxpert.com/ Those packing a big grudge, usually pack a big mouth along with it. {Original Message removed}

I have done using PWM...works great! I implemented on 80251 Miguel ----- Original Message ----- From: Severson, Rob <spam_OUTseversonTakeThisOuTJGED.COM> To: <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> Sent: Thursday, August 31, 2000 2:23 PM Subject: [EE]: RS232 to RF > Hello PIClisters! > > Can anyone point me to a small finished module that would allow me to > interface a handheld device that has a serial port via RF? The RF range is > local (about 100 feet / 35 meters). Frequency would need to be appropriate > for a U.S. control device. > > A little 9-pin rs232 box would be great. I've found a few RS232/RF solutions > that are not so hand-held. My specific application is for a Palm/Handspring > device. > > -Rob > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Rob Severson wrote: >Can anyone point me to a small finished module that would allow me to >interface a handheld device that has a serial port via RF? The RF range is >local (about 100 feet / 35 meters). Frequency would need to be appropriate >for a U.S. control device. > >A little 9-pin rs232 box would be great. I've found a few RS232/RF solutions >that are not so hand-held. My specific application is for a Palm/Handspring >device. I started a list of these - about 20 companies, on my site. Most of these are ckt boards, not finished modules. http://www.sni.net/~oricom/teklink2.htm The Laipac devices are quite cheap, $5 USD, but only 3Kbps. best regards, - Dan Michaels Oricom Technologies http://www.sni.net/~oricom ========================== -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Thanks! There are many more modules available now than there were even 1 year ago. The "finished product" version still eludes me. I'm hoping to find a complete module about the size of a 9-pin d-sub "gender bender" or even something that attaches directly to a Palm or Visor. -Rob -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> Can anyone point me to a small finished module that would allow me to > interface a handheld device that has a serial port via RF? The RF range is Here are two links I've found in the last few days. http://www.wirelessmountain.com/unilink.html http://www.linxtechnologies.com/f_modules.html I purchased a couple of SC transceivers from Linx Technologies, but haven't received them yet. They work on 912Mhz and are good for around 400 ft or so. Both are serial in. I know the SC module also has to have a pin pulled low for TX and another for RX. Once I get these up and running as a test, I will switch to a spread spectrum radio modem, which has MUCH greater range. jf -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Per usual, NO web site I've looked at has any price on those; I detest that. (I don't want to spend hours on hold, then be told a price that's too expensive - then have some sales droid "stalking" me for the next 6 months trying to talk me into buying those. I find that rather flustrating <G>) Does look like a rather good unit, though! Mark Severson, Rob wrote: > The unilink! *THAT'S* what I need! > > Thanks Jim. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Do you have a link to info on this module? I did a search and came up with nothing close. --- "W. K. Brown" <kbrownKILLspamMARSH-MCBIRNEY.COM> wrote: > I think Philips has just announced a Bluetooth module for about $8US > (@1500 > psc). Haven't checked it out yet. Let us know how it looks. > Regards, > Keith ===== Chuck Hellebuyck Electronic Products .....chuckKILLspam.....elproducts.com *****Program PICs Like a Pro********* Complete package for only $279.95 Includes: PBPro Compiler, EPIC Programmer, 16F84 PIC, Cable & Batteries http://www.elproducts.com __________________________________________________ Do You Yahoo!? Yahoo! Mail - Free email you can access from anywhere! http://mail.yahoo.com/ -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Rob Severson wrote: >Can anyone point me to a small finished module that would allow me to >interface a handheld device that has a serial port via RF? The RF range is >local (about 100 feet / 35 meters). Frequency would need to be appropriate >for a U.S. control device. > >A little 9-pin rs232 box would be great. I've found a few RS232/RF solutions >that are not so hand-held. My specific application is for a Palm/Handspring >device. ZDNet has a page on wireless, & wireless modems, inc buyers guide/etc. http://www.zdnet.com/special/filters/wireless/ Might try mining it, although the site is an endless series of mouseclicks and drilldown. Also: www.zdnet.com/products/stories/overview/0,8826,69379,00.html http://www.allnetdevices.com/wireless/ http://www.novatelwireless.com/palmtop/index.html best regards, - Dan Michaels Oricom Technologies http://www.sni.net/~oricom ========================== -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.