Figure 14From: Design and Implementation of a Generic Energy-Harvesting Framework Applied to the Evaluation of a Large-Scale Electronic Shelf-Labeling Wireless Sensor NetworkTransmit (Tx) and receive (Rx) timeline for one controller and three labels. Labels send a request for update (RFU) to the controller, the controller replies with an Update (U) after 200 ms. Four potential collisions of messages are identified.Back to article page