A method for pairing a transmitter of a continuous glucose monitoring system with a plurality of display devices, comprising, during each successive communication interval of a plurality of communication intervals, wherein each communication interval occurs between low-power sleeping states of the transmitter: the transmitter entering an advertising state for a period of time in which the transmitter transmits advertisement signals to advertise its availability for a connection; the transmitter receiving, in response to the advertisement signals, respective requests from a first display device and a second display device to connect with the transmitter; the transmitter connecting to the first display device over a first wireless connection; the transmitter connecting to the second display device over a second wireless connection; the transmitter limiting the number of display devices connected to the transmitter by rejecting additional connection requests during the communication interval; and the transmitter exchanging an application key for securing communication with the first display device and the second display device periodically, the application key changing at the beginning of each period; wherein: the transmitter determines a device type for the first display device and the second display device; and the transmitter identifies whether the device type for the first display device and the second display device is an allowed device type that is a type of device allowed to connect to the continuous glucose monitoring system; and the transmitter limits the number of display devices connected to one of the device type of the first display device and one of the device type of the second display device. the transmitter entering an advertising state for a period of time in which the transmitter transmits advertisement signals to advertise its availability for a connection; the transmitter receiving, in response to the advertisement signals, respective requests from a first display device and a second display device to connect with the transmitter; the transmitter connecting to the first display device over a first wireless connection; the transmitter connecting to the second display device over a second wireless connection; the transmitter limiting the number of display devices connected to the transmitter by rejecting additional connection requests during the communication interval; and the transmitter exchanging an application key for securing communication with the first display device and the second display device periodically, the application key changing at the beginning of each period; wherein: the transmitter determines a device type for the first display device and the second display device; and the transmitter identifies whether the device type for the first display device and the second display device is an allowed device type that is a type of device allowed to connect to the continuous glucose monitoring system; and the transmitter limits the number of display devices connected to one of the device type of the first display device and one of the device type of the second display device. the transmitter determines a device type for the first display device and the second display device; and the transmitter identifies whether the device type for the first display device and the second display device is an allowed device type that is a type of device allowed to connect to the continuous glucose monitoring system; and the transmitter limits the number of display devices connected to one of the device type of the first display device and one of the device type of the second display device.