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rcplanegy
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Joined: 23 Sep 2010
Posts: 174
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 Posted: 23 Sep 2010 11:28:54 am Post subject: wireless transmitting |
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wow i joined this morning and cemetech is already helping out soooo much thanks everyone.  another question though, has anyone acheived wireless transmitting of programs, apps, or maybe an IM program? i tried a while back with 2 walkie talkies (kinda dumb really) and of course, no luck. so, is there any form of wireless transmitters/ receivers for a calc? |
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benryves
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Joined: 12 Aug 2008
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Location: London, United Kingdom
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| Posted: 23 Sep 2010 11:39:44 am Post subject: |
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There's the IR Link, though I've never built it so couldn't say how well it works. It should be relatively easy to build a wireless transmitter/receiver pair using a microcontroller and cheap RF module at each end. The microcontrollers would convert the TI link protocol into a more typical serial signal which could then be passed to the RF modules.
Wireless links tend to have requirements that aren't covered by the calculator's link port (e.g. what if you have more than two calculators trying to communicate)? It would probably be worth investigating some sort of wireless bridge to CALCnet2.x or similar.  |
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KermMartian
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Joined: 14 Mar 2005
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| Posted: 23 Sep 2010 12:14:28 pm Post subject: |
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| benryves wrote: | There's the IR Link, though I've never built it so couldn't say how well it works. It should be relatively easy to build a wireless transmitter/receiver pair using a microcontroller and cheap RF module at each end. The microcontrollers would convert the TI link protocol into a more typical serial signal which could then be passed to the RF modules.
Wireless links tend to have requirements that aren't covered by the calculator's link port (e.g. what if you have more than two calculators trying to communicate)? It would probably be worth investigating some sort of wireless bridge to CALCnet2.x or similar. |
I actually bought a pair of 434MHz wireless transmitters and wireless receivers (one each for each calculator), but I haven't gotten a chance to try implementing anything with them yet.
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rcplanegy
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Joined: 23 Sep 2010
Posts: 174
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| Posted: 23 Sep 2010 04:33:58 pm Post subject: |
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you should. my budy and me were wanting a wireless link for IM sending during boring chemistry lectures  ill check out that IR link though, sonds interesting...
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qazz42
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Joined: 07 Apr 2010
Posts: 4177
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| Posted: 23 Sep 2010 04:41:19 pm Post subject: |
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uhh, why is this in TI-Basic?...
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rcplanegy
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Joined: 23 Sep 2010
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| Posted: 23 Sep 2010 04:44:36 pm Post subject: |
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i asked if there was any programs (tibasic programs) out there for this kind of stuff but i got skewed off twards asking if theres a transmitter :/
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KermMartian
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| Posted: 23 Sep 2010 04:46:12 pm Post subject: |
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| rcplanegy wrote: | | i asked if there was any programs (tibasic programs) out there for this kind of stuff but i got skewed off twards asking if theres a transmitter :/ |
That makes sense, but I'll probably request that a moderator (as opposed to a lazy uberadmin like myself) move this to the Calculator Mods and Hardware subforum. It would be nearly impossible to write any low-level drivers in TI-BASIC; they'd have to be in ASM. However, it would be possible for them to expose functionality to TI-BASIC programs.
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rcplanegy
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Joined: 23 Sep 2010
Posts: 174
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| Posted: 23 Sep 2010 04:55:56 pm Post subject: |
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well... i dont know crud about ASM except that when i need it, it works  but ok i think ASM isnt that a faster kind of more effecient way to write and execute programs? wow i really am a newbie...
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merthsoft
File Archiver
Joined: 09 May 2010
Posts: 2735
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| Posted: 23 Sep 2010 05:02:36 pm Post subject: |
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Since there isn't a "Calculator Mods and Hardware" section, I moved it to the "Calculator Hardware" section.
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KermMartian
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| Posted: 23 Sep 2010 05:28:07 pm Post subject: |
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| merthsoft wrote: | | Since there isn't a "Calculator Mods and Hardware" section, I moved it to the "Calculator Hardware" section. |
That's right, I forgot that I recently renamed it. Thanks, Merth.
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adept
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Joined: 04 Jul 2010
Posts: 294
Location: Las Cruces, NM
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| Posted: 23 Sep 2010 10:01:52 pm Post subject: |
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The IR link is a cool project! I never built one though because it was a little vague. I didn't feel like breaking anything trial and error to try to do it. IR is so weak anyway, you still have to see the other person. And it's not that bad to just make ur own extra long link cable!
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KermMartian
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| Posted: 23 Sep 2010 11:48:52 pm Post subject: |
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| adept wrote: | | The IR link is a cool project! I never built one though because it was a little vague. I didn't feel like breaking anything trial and error to try to do it. IR is so weak anyway, you still have to see the other person. And it's not that bad to just make ur own extra long link cable! |
Excellent points all around. One of the thing that scares most beginners away from the IR link is that not only does it require components and either breadboarding or soldering, but also requires a PIC to be programmed.
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adept
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KermMartian
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| Posted: 24 Sep 2010 06:20:26 pm Post subject: |
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| adept wrote: | | that too! programmers suck for a beginner! they cost monies that the beginner doesn't have. |
Quite so, and the complexity of buying both a chip and a programmer would discourage many people who would be willing to just go to their local Radioshack and spend $10 or $20 on parts.
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adept
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KermMartian
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| Posted: 24 Sep 2010 06:24:26 pm Post subject: |
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Is there something about being in school that's making everyone forget their grammar? *When *I *was *It *Lots
Congrats on that, though, that's quite impressive.
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benryves
Cemetech Expert
Joined: 12 Aug 2008
Posts: 1359
Location: London, United Kingdom
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| Posted: 24 Sep 2010 06:33:42 pm Post subject: |
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| PICs are rather fiddly due to the requirement of a high voltage on the Vpp pin (~13V) to enter programming mode. The simple DIY programmers I've seen use the serial port (often around ~12V) but the actual voltage varies widely between computers and as such they can be quite unreliable. (Another win for AVRs there). |
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adept
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benryves
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Joined: 12 Aug 2008
Posts: 1359
Location: London, United Kingdom
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| Posted: 24 Sep 2010 06:40:54 pm Post subject: |
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| AVR chips don't require a special voltage to enter programming mode. That said, simple bit-banging serial port programmers for the AVR are very slow; a parallel port programmer is significantly simpler and faster. |
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adept
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