As mentioned at the beginning of the post, I used a Dangerous Prototypes USB Infrared Toy to receive signals from the remote using the PyIrToy Python library. It’s been almost seven years since I worked on this, but I don’t remember having any issues receiving the signals. Sorry I can’t be of more help.

I wanted to make a version very similar to this that uses Linux’s built-in IR IR transmit/receive libraries rather than Python, but I ran into some difficulty when I tried to first read some of the signals transmitted by the remote itself.

Can I ask how you did this? I saw the post you linked where someone else decoded their Midea AC unit’s remote using an oscope and a logic analyzer — did you do the same for yours? When I tried to read the IR signals from the remote using just mode2 (https://linux.die.net/man/1/mode2), I only was able to read the signal for the power on button, the fan button, and the mode button, but none of the other buttons would report anything. I thought maybe there was an issue with my IR receiver, but when I tested it with a different device’s remote (for a TV tuner box), it worked fine and was able to receive a scancode for every button.

Given the 4-bit microcontroller, the sensor is obviously something cheap. Based on the silkscreen, I’d guess a thermistor. As the remote’s case is held together with plastic clips, I don’t want to risk damaging them by opening it again.

“RT” – This is a temperature sensor.
This means that actual temperature data can be sent from where the remote control is located. “follow me”
In your remote control, it will be present (soldered on the back of the board). I wonder what kind of sensor it is?

I don’t know what the value of RT is; I don’t have any photos of the other side of the PCB. I do not know what the “follow me” label on the PCB refers to.