Digital bracelets or wrist watches, which include functionalities like calculators and
unit converters, were commercially available for decades. Due to the technological advancements, they are equipped with data transferring facilities and becoming multifunctional. This paper presents design of a smart bracelet, which can identify the pairs of people during handshakes and exchange their contact details with each other. An advanced system was implemented to detect pairs of handshakes when happening concurrently as multiple pairs of people may do hand shaking at the same time when the crowd size is large in a gathering. A peak detection algorithm and a top-k algorithm were used to identify the matching handshakes by processing data.
Communication links were also established using the Bluetooth Low Energy (BLE) technology to exchange contact information of people who are handshaking with each other. Finally, a smart bracelet with multiple functionalities was manufactured and its performance was evaluated.