Originally Posted by
Davros
I see where your question is going.
Once I heard about a product called Electron from the company called Particle I looked into machine to machine (M2M) communication and GSM modems. Still seriously considering it. Checked cellular coverage maps for the fields I would probably use these items at and they are covered in general pretty well, but are on the edges of the coverage maps for GSM covered by products like the Electron.
I have made cellular calls from the parking lot of the two fields most likely to use the flags. In general, living in a low populated area I would not be surprised if cell service did not extend to most fields around here but I think I am covered in most cases. Have not thought about that option in awhile, maybe I should email some field owners and ask how service is there. Sure they would, sure they made a bunch of calls from the field over the years if they have coverage.