Self-powered wireless sensors and switches using EnOcean wireless standard are ideal for sustainable building applications. Powered by motion, light or heat, no cables or batteries are required for switching or for collecting sensor information such as temperature, water sensing or presence detection. Self-powered wireless sensor networks save resources by using fewer cables and eliminating the need for batteries. However, battery-powered devices can be costly as batteries need to be regularly replaced, can harm the environment and must be disposed of properly. Self-powered wireless sensors and actuators can directly communicate with each other and/or they can be controlled by a room controller/gateway to the cloud for applications that require remote sensing and control via PC or smart phones.