Reading around: the concept is that each puck advertises and one scans. The one you want to communication, you ask for a connection. When done with communication, disconnect and return to advertise/scan mode. Scanning has to be supported by a white list to ask only 'known' devices for a connection.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
It's a while ago since this NRF multiple connections? post and things gotten much enhanced now. Proof of it is this entry about notifications - a fixed bug in notifications.
Reading around: the concept is that each puck advertises and one scans. The one you want to communication, you ask for a connection. When done with communication, disconnect and return to advertise/scan mode. Scanning has to be supported by a white list to ask only 'known' devices for a connection.