@Ray, thank you for your answer. Now I know how to modernize my irrigation system. I certainly have to extend the WiFi range.
However, I have doubts about the type of power supply for the controllers. I do not know which AC / DC should I choose? I have TORO EZ-Flo 24VAC solenoid valves. Is the DC controller a good choice for my solenoids? I read the blog, but I need to make sure everything will be ok.
Can you help me with this?