long range wireless link to arduino

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i've built water tank monitoring system logs water usage @ tank 1500' our house in hilly terrain. direct path has lots of trees , far line-of-site. currently, take laptop on atv download data i'd access data house. there no possibility of pulling wire site there (minimal) power @ tanks. (there power @ intermediate pump house although off direct path.)

can shed light on whether high power wireless systems such engenius work through trees , not line-of-site?

i've though of using wireless pump house power line system pump house tanks. familiar amped wireless av500 power line network adapters?

i've thought of using mifi cellular modem cost minimum of $40/mo. ($40/mo buy lot of miles on atv.)

https://www.kickstarter.com/projects/flutterwireless/flutter-20-wireless-arduino-with-half-mile-1km-ran

maybe ????


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