Solution to AC remote giving different data for same button pressed

[AMHKM-1]

Hi everyone,

I'm not sure if this is common knowledge or not, but perhaps this will help some of you.

For the past two days, I was trying to get the hex code and raw data sent by my IR remote. Unfortunately, the same button (e.g., the temperature up button) kept giving different data each time. This made me think something was wrong with my VS1838B receiver. Here’s what I discovered:

AC remotes are not like other remotes. Typical remotes have a single code assigned to a button, but AC remotes send codes depending on the state of the AC. For example, my AC with cool mode on and temperature set to 25°C has a specific IR signal assigned to it, while cool mode at 26°C has another code. So, if your AC is in cool mode at 24°C and you press the temperature up button, the hex code for 25°C cool mode is sent. If you press the same button again, another hex code is sent, even though you pressed the same button.

Practically, this means you need to capture every hex code for each specific AC state (temperature and mode) you want to implement. Feel free to ask any questions. A big thanks to crankyoldgit for this amazing library!

[NiKiZe]

Yes that is expected.
There is an issue template that you are expected to fill when creating an issue. It also has links to the FAQ.

Why are you even opening an issue? (What is it that you want us to do?)

[AMHKM-1]

Wanted to post it in discussion rather than in issues . It's just the solution to an issue many ppl first using the library face , perhaps it could help someone

[crankyoldgit]

I'm not sure if this is common knowledge or a not, but I'm confident this will help many of you.

Yep. Fairly common knowledge. See: https://github.com/crankyoldgit/IRremoteESP8266/wiki/Adding-support-for-a-new-AC-protocol#a-note-on-collecting-data

[AMHKM-1]

Thanks for the link , very useful read .
I already got through making a table of each mode and temp with the according hex code , Here is an example
auto mode 18 C : 0x21F18
auto mode 19 C : 0x21F38
auto mode 20C : 0x21F28
auto mode 21 C : 0x21F68
auto mode 22 C : 0x21F78
auto mode 23 C : 0x21F58
auto mode 24 C : 0x21F48

cold mode 18 C : 0xB2BF10
cold mode 19 C : 0xB2BF20
cold mode 20C : UNKNOWN
cold mode 21 C : 0xB2BF60
cold mode 22 C : 0xB2BF70
cold mode 23 C : 0xB2BF50

dry mode 22C : 0xB21F47
dry mode 23C : 0xB21F57

What i can get from these patterns is :
Temp is specified by the second the to the last digit
mode is specified by the 3 first and the last digit

My question is , Can i do with just storing the code of each AC specs in a matrix and just send the needed IR signal according to the mode and temp i chose without doing further analysis ?

[crankyoldgit]

My question is , Can i do with just storing the code of each AC specs in a matrix and just send the needed IR signal according to the mode and temp i chose without doing further analysis ?

Yes.