Originally shared by Roberto Coli I am building my MQTT Tasmota IR transmitter to

(Roberto Coli) #1

Originally shared by Roberto Coli

I am building my MQTT Tasmota IR transmitter to be connected to my home assistant.
The goal is to control my air conditioner Olympia Splendid via IR.

I had to fight to understand the IR signal emitted from the proprietary device remote. In order to facilitate the task I have used Arduino and a IR receiver shield to try to decode the signal. I have also connected the IR shield output to a digital signal analyzer oscilloscope to get the data.

I could not see the original data, since the IR receiver transistor of the shield demodulate the IR signal on the output. So I have bought this very interesting kit from

that has all the type of hard to find IR receivers for all kind of frequency signals all in one package. The site has a well documented usage of each kind of diode or IR transistor of the kit. A must have for anyone interested in playing with InfraRed signals.

There is also one that does not demodulate the signal and let’s measure the exact IR frequency emitted on your own digital oscilloscope.

I bought also from the same shop a nice WEmos IR shield that I will put on directly on my WEmos with tasmota to have the complete device.

I also bought their AnalysIR application, that gave me a great help in reverse engineering the digital IR signal and transform it in real commands bytes.
They gave a custom firmware for Arduino or ESP8266 to use with the application to analyze the data.

I was able to get a good understanding of the signal and write a new implementation of the Olympia Splendid IR protocol on the Arduino IR Lib.
I tried and after some debugs I was able to successfully send the command from Arduino to turn the device on.
Now I will improve the code on the library, and then I will port on the Tasmota IR Library integrating with the already existing IR MQTT commands.

(Bunny Evans) #2

Your next challenge is to upgrade to Daikin, their IR is two way. you press a button and it tells you the current indoor, outdoor and how many kWh it’s used…

(In Japanese ^^;)

(Roberto Coli) #3

The ESP shield has also the receiver part, so it is just a matter to implement the Daikin protocol and add it to Tasmota (if is not already there) and HomeAssistant and Tasmota can get the current environment data through MQTT :slight_smile:

(Bunny Evans) #4

@Roberto_Coli Not sure I’d want that, the Daikin will beep when it receives a command ^^;

Not sure about newer ones. The nice thing about Daikin is that I can still get repairs on my 17 year old A/C

Next door couldn’t even get their 3 year old Mitsubishi repaired and had to replace it.

(Gustavo K) #5

Sure you can get it to work , my acc is not controlled by it’s inside controller , it is controlled by home assistant using a sonoff th, and a custom ir transmitter connected to same sonoff … , super cool. , or warm …