I am a newbie to Opensprinkler. I have written a couple of Arduino programs (very basic) recently and used to write software programs in C 10 years ago. I am trying to see if I can setup a soil moisture sensor with opensprinkler to water my lawn and tie in alexa echo do to get updates on my lawn watering. Also, maybe update the mobile app with any new features I can think of (this is for later).
Can you please tell me what are the best components I should buy to accomplish this? It would be great if you can suggest the moisture sensor as well. Is it better to plug the moisture sensor to a raspberry Pi board and have the Raspberry PI connected to Opensprinkler PI?
Thank you for your guidance. I am a novice willing to put in the effort to learn. Thank you.