The Industrial Internet of Things (IIoT) vision relies on reliable low-power wireless technologies and a complete standardized protocol stack that brings Internet connectivity to constrained end devices. Currently IEEE802.15.4-2015 TSCH provides reliability over low-power wireless technologies and the IETF has defined a protocol stack that is suitable to constrained devices. Open-source initiatives contributing to the development of network stacks for embedded devices, and the availability of open hardware platforms that facilitate prototyping IIoT applications contributes to the adoption of IIoT technologies. To realize the IIoT vision, this demo presents the OpenWSN and OpenMote projects, which provide both an opensource software implementation of the IEEE low-power wireless technologies and the IETF protocol stack, and an open-source hardware platform that meets the requirements to prototype IIoT applications.