https://www.lora-alliance.org/
https://medium.com/@dconrad/how-new-long-range-radios-will-change-the-internet-of-things-ed8e6b5e367f#.6oj7erk51 Here's a manufacturer with a datasheet: http://www.semtech.com/images/datasheet/sx1276_77_78_79.pdf http://www.semtech.com/apps/product.php?pn=SX1276
