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