Thanks. I pulled the trigger on an OS AC, zone expander and TP Link WiFi adapter to play with on my home irrigation system (Hunter I-Core clock).
I can’t seem to find any cell hotspot devices with a wired connection like you mentioned. Maybe I’m just not understanding your recommendation, though.
I could be thinking about it all wrong but right now it SEEMS like a solution to my problem at my little league fields with no Wifi is an Arduino Uno with an ethernet shield (connecting to the OpenSprinkler) + SparqEE Shield + SparqEE CELL might work. Would appreciate any feedback on this potential solution.
This is my first journey into small electronics hardware (e.g. arduino boards and shields etc). The last time I tried soldering was in 1995 attempting to fix cheap memory modules with cold joints from third rate manufacturers.