The Robman: 2 revisions imported

2025-11-02T18:52:23Z

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The Robman: /* Variant IRstreams in NEC protocols */

2014-10-05T18:13:57Z

Variant IRstreams in NEC protocols

← Older revision		Revision as of 18:13, 5 October 2014
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	-y2: D:8,S:8,F:8,F:1,~F:7:1 (complement all of F except the LSB)		-y2: D:8,S:8,F:8,F:1,~F:7:1 (complement all of F except the LSB)
	-y3: D:8,S:8,F:8,F:1,~F:6:1,F:1:7 (complement all of F except MSB and LSB)		-y3: D:8,S:8,F:8,F:1,~F:6:1,F:1:7 (complement all of F except MSB and LSB)
			-rnc: D:8,S:8,~F:4:4,~F:4 (complement F and reverse the nibbles)
	-f16: D:8,S:8,F:8,E:8 (no relationship between the 3rd and 4th bytes)		-f16: D:8,S:8,F:8,E:8 (no relationship between the 3rd and 4th bytes)
	{{:NEC1}}		{{:NEC1}}

The Robman: Created page with "=NEC= NEC is a family of similar protocols including NEC1, NEC2, Tivo, Pioneer, Apple, NECx1 and NECx2. If you get a decode whose protocol name..."

2014-09-29T03:20:20Z

Created page with "=NEC= NEC is a family of similar protocols including NEC1, NEC2, Tivo, Pioneer, Apple, NECx1 and NECx2. If you get a decode whose protocol name..."

New page

=[[NEC]]=
NEC is a family of similar protocols including [[NEC1]], [[NEC2]], [[Tivo]], [[Pioneer]], [[Apple]], [[NECx1]] and [[NECx2]]. If you get a decode whose protocol name is simply "NEC" that indicates the learned signal is not complete (usually caused by not holding the original remote's button long enough during learning). Enough of the signal is present to accurately determine the device, subdevice and OBC numbers. But not enough is present to determine whether the protocol is [[NEC1]] or [[NEC2]].
==Difference between NEC1 and NEC2==
The difference between [[NEC1]] and [[NEC2]] only affects the signal sent by a long keypress. A short press sends the same signal in [[NEC1]] and [[NEC2]].
==Variant IRstreams in NEC protocols==
For [[NEC1]], [[NEC2]], [[NECx1]], and [[NECx2]] protocols, the IRstream contains D:8,S:8,F:8,~F:8
However, some manufacturers (especially Yamaha and Onkyo) are breaking the "rule" that the 4th byte should be ~F:8
Version 2.42 decodes these variants by adding suffixes to the protocol name depending on the IRstream:
-y1: D:8,S:8,F:8,~F:7,F:1:7 (complement all of F except the MSB)
-y2: D:8,S:8,F:8,F:1,~F:7:1 (complement all of F except the LSB)
-y3: D:8,S:8,F:8,F:1,~F:6:1,F:1:7 (complement all of F except MSB and LSB)
-f16: D:8,S:8,F:8,E:8 (no relationship between the 3rd and 4th bytes)
{{:NEC1}}
{{:NEC2}}
{{:NECx}}
{{:NECx1}}
{{:NECx2}}
{{:48-NEC}}
{{:48-NEC1}}
{{:48-NEC2}}
[[Category:DecodeIR]]

NEC - Revision history

The Robman: 2 revisions imported

The Robman: /* Variant IRstreams in NEC protocols */

The Robman: Created page with "=NEC= NEC is a family of similar protocols including NEC1, NEC2, Tivo, Pioneer, Apple, NECx1 and NECx2. If you get a decode whose protocol name..."