Wifi irrigation controller - PCBs

My professionally made PCBs have arrived fr my wifi irrigation controller - they look great.

I am learning to use wifi and Arudino board my question is what wifi board would you recommend for longer distances. I have tried looking on Arduinos site but none of the boards show the maximum distance they work. I have an arduino uno should I change boards. I am looking for a distance from my home to the mailbox.

Google Vinduino...doing what I think you are attempting with loRA ,,,check it out...good people