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Long-range (LoRa) radio technologies have recently gained momentum in the IoTlandscape, allowing low-power communications over distances up to severalkilometers. As a result, more and more LoRa networks are being deployed.However, commercially available LoRa devices are expensive and propriety,creating a barrier to entry and possibly slowing down developments anddeployments of novel applications. Using open-source hardware and softwareplatforms would allow more developers to test and build intelligent devicesresulting in a better overall development ecosystem, lower barriers to entry,and rapid growth in the number of IoT applications. Toward this goal, thispaper presents the design, implementation, and evaluation of KRATOS, a low-costLoRa platform running ContikiOS. Both, our hardware and software designs arereleased as an open- source to the research community.

KRATOS: An Open Source Hardware-Software Platform for Rapid Research in LPWANs