Difference between forcing RAW or not?

[Luke M.]

I'm having a weird occurance with transmitting a code to turn my Philips television on and off using my USB-UIRT through Girder.

The plugin learns the IR code just fine. However, when I execute that command and the USB-UIRT transmits my code, it will turn the television off, but not back on. If I uncheck "Force RAW Mode Learning" and learn the same button, the IR code it saves looks slightly different. When I transmit that code, it will turn the TV on, but not off.

The way the button on the remote works, naturally enough, is that if you click it once the TV comes on, click it again, and the TV goes off.

I've searched the boards but haven't found this kind of scenario listed before. I don't know if it's something peculiar with my TV remote, or with how I'm setting up the learning event. Does the fact that it gives a different result when RAW Mode learning is checked or not tell us anything?

Any thoughts?

[Guest]

are you using the Hauppauge silver remote with Sage [and to turn off the tv]?

[Guest]

correcting my previous post...what remote are you using?

[Luke M.]

I'm just using the regular remote that came with the television, which is a Philips/Magnavox 25TS56. I'm not using a TV tuner card in my pc or anything.

[jrhees]

OK, first of all, I would recommend turning on Force raw anytime you learn (it is actually on by default in newer plugin versions). However, I don't think it has anything to do with your problem.

I think your problem might have to do with a 'parity' bit(s) in your remote code. Some remotes toggle such bits between each remote keypress for key debounce purposes. So, try this:

1. Use the learned code in Girder to turn the TV on (or OFF).
2. Using your original remote press a number or volume button.
3. Try using the learned code in Girder again.

Repeat this a few times and see if pressing a button (or buttons) on your remote in between the two Girder transmissions has an effect.

-Jon

[Luke M.]

Yes, you're quite right. If I turn the TV on with the learned code, for instance, and then use my original remote to adjust the volume, when I try the learned code again it will succesfully turn the TV off.

With this info, I set up a multicommand in Girder which sends the TV on/off command, followed by another signal which doesn't really affect the TV, but does apparently reset the parity bit. Using the multicommand I can get my UIRT to turn the TV on and off.

Is this the solution for such a remote?

[jrhees]

This is *A* viable solution, as there are probably others. Many people tackle this with Pronto remotes and others by creating a macro which always follows a command with an innocuous button. This is essentially what you have done.

-Jon

[Luke M.]

Well, so long as it works. Thanks for your help.

And let me just say also, great product. This is the fourth UIR/T device I've used, and is my favorite so far. I've not had any problems with it whatsoever. Keep up the good work.

-Luke