Honeywell Portable Air Conditioner Infrared Codes
I have a Honeywell MM14CCSBB (this may also work with MM14CCS). I want to build a device that can control it via internet. It comes with an infrared remote, so I need to make my device send out the same protocol as this remote.
Code Basics
All observations was done using a IR demodulating receiver that is active low open drain. When it outputs a logic low signal, it means the infrared LED is emitting.
The code is a series of bits, 1 or 0, which seems to be code that is LSB first.
All bits are precedes by a low period that is the same length regardless of if the bit is 0 or 1. The bit is indicated by the length of the high period following, short means 0 and long means 1.
See image for precise timings: Media:Honeywellacircode.png
Example Codes
Turning On and Off
00010010000110001000010000000010 = off 00010010000110001010010100000010 = on
Temperature Set
00010010000110001010010100011010 = 89 degrees F 00010010000110001010010110111100 = 61 degrees F
Fan Speed
00010010000110001010010100000010 = highest 00010010001010001010010100000010 = mid 00010010010010001010010100000010 = lowest
Modes
00010010000110001010010100000010 = AC 00010010000100101010010100000010 = dehumidify 00010010000100011010010100000010 = fan only
Timer
00010010000110000001111100000010 = timer on 24 00010010000110000001110100000010 = timer off 00010010000110000001111100000010 = timer on 24 00010010000110001110111100000010 = timer on 23 00010010000110000110111100000010 = timer on 22 00010010000110001010111100000010 = timer on 21 ... 00010010000110001100011100000010 = timer on 3 00010010000110000100011100000010 = timer on 2 00010010000110001000011100000010 = timer on 1 00010010000110001000010100000010 = timer off
Analysis
|A |B |C |D |E|F|G|H |
000100100 001 1000 10000 1 1 1 00000010
A = unknown
B = fan speed
001 = highest
010 = medium
100 = lowest
C = mode
1000 = AC
0010 = dehumidify
0001 = fan only
D = timer hours
E = unknown
F = timer on/off
G = power on/off
H = temperature
