I have WiFi. It's only a 4G hotspot but it may cover the area.

I tried a La Crosse thermometer. The range is supposedly up to 330 feet but it wouldn't work at that distance. And I need something that will work at 500-600 feet.
http://www.amazon.com/Crosse-Technology-...osse+technology

I have seen Arduino devices online that have a 1/2 mile range but have no idea how to work with that stuff.
https://www.kickstarter.com/projects/flu...lf-mile-1km-ran

There are plenty of inexpensive temperature probes out there that work with Arduino devices:
http://www.tempsensing.com/sensors/1wire...jvxIaAkRO8P8HAQ

Budget? Not sure, maybe up to $100?

Last edited by RobA; 01/29/15 11:09 AM.