This paper aims at demonstrating the energy self-sufficiency of a LoRaWAN-based sensor node for monitoring environmental parameters exploiting energy harvesting directly coming from the artificial light used in indoor horticulture. A portable polycrystalline silicon module is used to charge a Li-Po battery. employed as the power reserve of a wireless sensor node able to accurately mon... https://www.roneverhart.com/Dr-Squish-Squishy-Refill/