NEC1-X2 (two repeats of data)

NEC1 · Post by **NEC1** » Fri Nov 12, 2010 1:53 am

On a Creative RM-900 remote, I found that it outputs NEC then NEC1 protocol decodes for each function (both protocols have the same Device, Subdevice and Function codes, using DecodeIR.dll version 2.41)
A search of NEC protocols with Device 193 and Subdevice 68 revealed that the original remote Function codes corresponded to Audio Device 0872, with the protocol being NEC1-X2 and the Parameter (3rd Device number) being 22.

Post by **The Robman** » Fri Nov 12, 2010 7:18 am

Is this just an information post or do you need help with it?

NEC1 · Post by **NEC1** » Tue Nov 16, 2010 2:07 am

This is an information post; DecodeIR.dll needs an update to cater for this particular protocol.

Post by **The Robman** » Tue Nov 16, 2010 7:08 am

DecodeIR reports exactly what's there. It's up to the user to interpret what they see and select the right protocol with the right options.

Post by **vickyg2003** » Tue Nov 16, 2010 8:50 am

I agree with Rob, decodeIR NEEDS to report this as Nec-Nec1, but I'm very happy that you called this protocol to my attention, because I was totally misreading the name of this protocol.

I was confusing Nec1-X2 with Necx1 and Necx2, because I'd never seen all three names together.

So I loaded up my Atlas and took a look at the Aud/0872 signal with my IR-Widget.

A Nec1 sends:
Nec, ditto, ditto, ditto, ditto.....

A Nec2 sends:
Nec, Nec, Nec, Nec, Nec.......

A Nec1-X2:
Nec, Nec, ditto, ditto, ditto, ditto.

A Necx1 is a signal that follows the Nec1 rules except the lead-in timing pair is smaller and ditto timings rules are different.

A Necx2 is a signal that folllows the Nec2 rules except the lead-in timing pair is smaller.