<a href="http://www.mytvstore.com/product_id_004.html">http://www.mytvstore.com/product_id_004.html</a><br>
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They have USB as serial versions.<br><br><div><span class="gmail_quote">On 10/20/05, <b class="gmail_sendername">Robert Denier</b> <<a href="mailto:denier@umr.edu">denier@umr.edu</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I thought I saw a device that connected via a serial port that would<br>send remote codes awhile back, but I can't remember its name. Basically<br>you would send a "2" or whatever via serial, and not the complex
<br>modulation pattern. The devices hardware would handle the rest.<br><br>Now, I've no idea if such a thing would work with multiple dish 301<br>receivers or not, but perhaps someone can at least think of the name of<br>
it.<br><br>-Robert<br><br>On Thu, 2005-10-20 at 11:33 -0400, Dan Wilga wrote:<br>> At 10:08 AM -0500 10/19/05, Robert Denier wrote:<br>> >For some reason my lirc output has been very unreliable lately. I keep<br>
> >getting wrong channels, particularly sense I went to dish 301 receivers<br>> >from the newer model version.<br>><br>> I have the same problem. I believe it has to do with the fact that<br>> lirc relies on the RTC timer. If something happens to interrupt it
<br>> while it's pausing, the frequency of the output will be off and the<br>> receiver will balk. I think what makes the 301 more sensitive to this<br>> than other IR devices is the fact that it operates at a higher
<br>> frequency (56000 Hz) than most.<br>><br>> I'm using an opto-coupler to interface my serial port to the Dish 301<br>> receivers, so I know it's not an LED-related problem. I have tried<br>> niceing the lirc process so it won't be as likely to get interrupted,
<br>> but that doesn't seem to help.<br>><br>> My next step is to build a device that will send the IR pulses<br>> independently of the PC, but I don't know how long that will take.<br>> For now I just put up with the occasional missed program.
<br>><br>> By the way, I analyzed the signal received by the Dish receiver with<br>> an oscilloscope and compared it to what was being generated by my<br>> device. After tweaking, I came to this lirc config, modified from the
<br>> stock "3100" remote:<br>><br>> begin remote<br>><br>> name 3100<br>> bits 16<br>> flags SPACE_ENC<br>> eps 30<br>> aeps 100<br>> header 550 5830
<br>> one 550 1550<br>> zero 550 2570<br>> ptrail 550<br>> gap 5530<br>> min_repeat 8<br>> toggle_bit 0<br>> frequency 56000<br>>
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