AC IR code decrypting

[dpressle]

@Nca78 I think you are on to something, thanks a lot. I will investigate it further, but in the mean time here is some more data that i took:
mode fan temp
cold auto 26
1001 0000 0101 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 1111
cold auto 25
1001 0000 1001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 0111
cold auto 24
1001 0000 0001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 1011
cold fan1 24
1001 1000 0001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 1011
cold fan2 24
1001 0100 0001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 1011
cold fan3 24
1001 1100 0001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 1011
dry fan1 24
0101 1000 0001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 0111
air fan1 24
1101 1000 0001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 1111
heat fan1 24
0011 1000 0001 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 0000
OFF cold auto 26
1000 0000 0101 0000 0000 0110 0000 1010 010 - 0000 0000 0000 0100 0000 0000 0000 1110

[dpressle]

@Nca78 can you please explain why do you add 0101 to the checksum in the temperature example?

[Nca78]

@dpressle
I add it because it is the initial value of the checksum when temperature is 16°C = 0000
I just wanted to show than an increase of 1 in temperature was producing an increase of 1 in checksum.

I think your minus sign (= 19ms pause ?) is in wrong position as it is supposed to be after the 6 (and not 8 ) first words ?

Please take some values by changing the horizontal and vertical swing so we can try to change the second part of the message. After that try some other functions if you have (anything like "eco"/"quiet"/"turbo" options for example) and also if you have it the timer.

[dpressle]

@Nca78 OK, i will generate more commands and see if it makes more sense, Thanks for your help.

[ToniA]

@dpressle said:

@ToniA can you elaborate?

Yes, on my AC IR decoder sketch I have decoder modules for different heatpumps. Like this:

https://github.com/ToniA/Raw-IR-decoder-for-Arduino/blob/master/MitsubishiElectric.cpp

So, write a new one, and add a call to it into https://github.com/ToniA/Raw-IR-decoder-for-Arduino/blob/master/rawirdecode.ino#L315. First you need to write a condition to recognize the protocol (like, from the first bytes + length etc). Then just start adding functionality, like decoding the temperature, then operating mode etc.

[dpressle]

@ToniA i got you, but the problem is i still dont know the checksum value, working on it...

[Nca78]

@dpressle could you please also post a picture of the back of your remote control ? I would like to confirm it's the one I quoted above, would be very interesting as it seems this RC/protocol is shared with a loooot of brands and models.
It's a very interesting case for this reason but also because it's using a checksum based on 4 bits words and excluding some of the "data" bits (at least the fan speed), it's the first time I see this.

[dpressle]

@Nca78 yes it is YB1FA

[A Former User]

In case you are still interested, here is the full description of this code:

0_1469565492669_Gree.pdf

[Nca78]

@joker_mkd That's a fraction of a VERY interesting document you have posted here
I suppose the other 180 pages are not freely available ? :D

[dpressle]

@joker_mkd said:

In case you are still interested, here is the full description of this code:

0_1469565492669_Gree.pdf

Thanks, this is great looks like exactly what i need, all the relevant information is there.
I will now write some code to implement this.

Thanks.

[A Former User]

@Nca78 Unfortunately not. This is a part of the document which we use to define IR codes for our product called PebbleAIR . These codes are implemented in the Android and iOS app. It took me a lot of time, money and effort to decode all the different brands and remotes. I often browse the forums and if I see that someone is stuck or in a need, I share remote data from time to time. If you desperately need data for a certain brand od model feel free to PM me, and I might help you.

[Nca78]

@joker_mkd I understand, it's very nice from you to share these pages already !
You have a nice product, I love the flashing function I will have to try that just for the fun of it :)

[dpressle]

@joker_mkd product looks great, did you ever thought of making these units smaller (so can be attached on an AC for example) and have some kind of API exposed so any Home Automation can use them? MySensors ZWave Wifi http etc...

[A Former User]

@dpressle We are in the process of making an API, because several companies have asked us for this. I was not involved in the process of hardware design, and I agree that the unit could have been made smaller, probably in the next revision.

[dpressle]

@joker_mkd Sounds wonderful, good luck, i will be watching you :wink:

[ToniA]

This is what I have done as a hobby so far: https://www.openhardware.io/view/41/Heatpump-airconditioner-controller

There's no Gree support in the HeatpumpIR library, though.

[dpressle]

@ToniA i know, i will try to add it to your library (if no one will beat me to it)

[Nca78]

@dpressle said:

@ToniA i know, i will try to add it to your library (if no one will beat me to it)

Not me :p
I'll implement it in my own library if I manage to make something valuable.

[dpressle]

@Nca78 said:

@dpressle said:

@ToniA i know, i will try to add it to your library (if no one will beat me to it)

Not me :p
I'll implement it in my own library if I manage to make something valuable.

Let me know if you get it done please!