Battery-free monitoring station for smart homes and offices, featuring temperature, humidity, pressure and light sensors as well as a proximity presence detector. This IoT node was designed with sustainability in mind: the case is realized with recycled plastics and the electronics is solely powered by Ribes Tech’s printed photovoltaic modules. The device is specifically tailored to work without relying on batteries, with just an energy harvester as its power supply: it communicates only if there is enough energy available. The number of tag transmissions in a given time interval varies proportionally in relation with light intensity: more light equals more frequent broadcasting events.