Hi there.
Your project sounds very interesting, in fact I have built something very similar in my own time. I have a lot of experience working with the raspberry pi and have several around the house doing various tasks. The one that would be of particular interest to you would be the one that automates our greenhouse. We can log in from anywhere and monitor / control / schedule various systems maintaining the plants. This was built primarily with python which would likely suit your project, however I also have done a far bit of development with nodejs too. As you can see I am new to freelancer and I would appreciate the opportunity to prove my myself.
Regards;
Josh