Re: How to troubleshoot IR blaster

[Jan C. <jan...@gm...>]

On 06/05/12 10:21, Peter Korsgaard wrote:
> I have one of the old DB-A110 (SD) boxes, and had similar problems when
> I tried to get it working:
> 
> http://lirc.sourceforge.net/remotes/telenet/DB-AD110
> http://old.nabble.com/irrecord-troubles-with-RC6-td26761416.html
> 
> I ended up using a serial receiver/transmitter, which seems to have
> higher accuracy than the MCE ones. It more or less works, but not
> 100%. Sometimes the STB misses a keypress (which typically causes mythtv
> to record the wrong channel :/)
> 
> A 100% working solution would be good. I haven't spent much time on it
> since 2009, but perhaps the way forward is to measure the IR receiver
> response from the original remote using a scope and make a custom
> transmitter with an AVR or so, instead of generating the timing using
> the PC serial port.

Hi Peter.

Thanks for your reply.

I had come across the above during my googling. The fact that you got
yours working (more or less) with the config file created using irrecord
-f led me to believe that I was doing something wrong when this approach
would not work for me.

(For the benefit of the list: Peter's Digibox is an older model which
uses a different IR protocol from the HD version of the Digibox that I'm
using).

I'll try and build a serial blaster and then see whether my existing
config file works.

But I'd also like to make this as reliable as possible. Are there any
howtos for measuring the remote's signal with a scope (in case I can get
some scope time at work) and using those measurements to create a lirc
config file?

Thanks, Jan