Hi, I want to use the spray system of T40 in my garden. Just for fun How can I use this with a microcontroller like arduino without connecting it to a drone?

To understand this, I need to know which cable does what. Is there anyone who can help me with this?

This device works pretty well for garden applications.

If you're not afraid to destroy the warranty, you can try looking with a multimeter where the pump is. To do this, you start the drone and you monitor the voltage that comes out of the cables when you request the activation of the pump.
The black cable seems to me to be a good base to put the ground.

Once you find out which cable goes where, I could give you a wiring diagram and an arduino code if you want.
I like a lot of wacky kind of projects.

I have a few ideas about where the wires go but I'm still not sure. I'm waiting for any suggestions