Weightless is the name of a set of LPWAN open wireless technology standards for exchanging data between a base station and thousands of machines around it. These technologies allow developers to build Low-Power Wide-Area Networks (LPWAN). There are currently two published Weightless connectivity standards, Weightless-N and Weightless-W. Weightless-N uses ultra narrow band technology operating in licence exempt sub 1GHz spectrum in what is commonly known as the Industrial, Scientific and Medical (ISM) bands. In Europe this includes a range of frequencies around 868MHz; in North America around 915MHz.
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