IR Remote codes that alternate?

[David L. Jones]

I'm looking at the data output from a Thomson RCT110S remote and the
code is not consistent for the same button press. Instead it seems to
alternate between codes for each press of that button. i.e, press "1"
and I get one code, press "1" again and I get a different code, press
"1" a third time and it goes back to the first code I got. Occasionally
it will give me something else entirely and then go back to
alternating, crazy.
It does the same thing with both an IR receiver chip and a discrete
photo transistor, so it's not the receiver chip going wonky.

Another Thomson remote I have (RCT4130S) also does this.

But all my other remotes (Sony HT, no name DVD, aircon etc) all give a
single consistent code for the same button, as I'd expect.

Anyone know what on earth the Thomson remote is doing?

Thanks
Dave

 

[Clifford Heath]

Anyone know what on earth the Thomson remote is doing?

It's how the receiver differentiates between you holding the button
down, and pressing it multiple times. I thought all remotes did that.

Clifford Heath.

 

[HKJ]

I'm looking at the data output from a Thomson RCT110S remote and the
code is not consistent for the same button press. Instead it seems to
alternate between codes for each press of that button. i.e, press "1"
and I get one code, press "1" again and I get a different code, press
"1" a third time and it goes back to the first code I got. Occasionally
it will give me something else entirely and then go back to
alternating, crazy.
It does the same thing with both an IR receiver chip and a discrete
photo transistor, so it's not the receiver chip going wonky.

Another Thomson remote I have (RCT4130S) also does this.

But all my other remotes (Sony HT, no name DVD, aircon etc) all give a
single consistent code for the same button, as I'd expect.

Anyone know what on earth the Thomson remote is doing?

Some codes does have a toggle bit, this bit toggles each time your start
on a new keypress.


http://www.miscel.dk/MiscEl/miscelSerialCommunication.html
Can show your curves for many different remote controls.

 

[David L. Jones]

It's how the receiver differentiates between you holding the button
down, and pressing it multiple times. I thought all remotes did that.

Apparently not, all my other remotes send exactly the same code each
time the same button is pressed. The Thomson seems to be the odd one
out.

Dave

 

[Ray]

I'm looking at the data output from a Thomson RCT110S remote and the
code is not consistent for the same button press. Instead it seems to
alternate between codes for each press of that button. i.e, press "1"
and I get one code, press "1" again and I get a different code, press
"1" a third time and it goes back to the first code I got. Occasionally
it will give me something else entirely and then go back to
alternating, crazy.
It does the same thing with both an IR receiver chip and a discrete
photo transistor, so it's not the receiver chip going wonky.

Another Thomson remote I have (RCT4130S) also does this.

But all my other remotes (Sony HT, no name DVD, aircon etc) all give a
single consistent code for the same button, as I'd expect.

Anyone know what on earth the Thomson remote is doing?

Thanks
Dave

Hi Dave,

sounds pretty normal for an RC5 based remote.

Real PITA if you try to use a 3rd party learning remote. You can turn
the TV off, but not back on, unless you press a different code first.

Cheers, Ray

 

[David L. Jones]

Hi Dave,

sounds pretty normal for an RC5 based remote.

Real PITA if you try to use a 3rd party learning remote. You can turn
the TV off, but not back on, unless you press a different code first.

Cheers, Ray

Thanks guys. Looks like I'll just have to "deal with it"!

Dave