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40 CHAPTER 4. MARKET STUDY Figure 4.17: Self-powered wireless sensor technology from EnOcean. When a button is pressed, for example, the linear motion can be transformed into enough energy to transmit the information about the action. These solutions from EnOcean are used in Lighting, HVAC and as a subsystem in BAS, such as KNX and LON [36]. Structure In a wireless sensor network, based on EnOcean technology there are three types of system components: sensor, repeater and end node, as shown in Figure 4.18 [21]. Figure 4.18: EnOcean smart repeating concept. The Smart Routing or Smart Repeating, shown in Figure 4.18, is often sufficient in small systems such as residential homes. The Smart Repeating is a plug and play setup so no complex system configuration is needed. For larger system, the 2-level repeating is, however, not sufficient and therefore a mesh routing is required [21].
