Connection Events; Connection Interval; Use Slave Latency; Bluetooth® Le Parameters In Bluetooth® Configurator - Infineon AIROC CYW43012 Manual

Low-power system design with AIROC™ Wi-Fi & Bluetooth® combo
chip and PSoC™ 6 MCU
Bluetooth® power optimization techniques
4.2

Connection events

4.2.1

Connection interval

The connection interval for a Bluetooth® LE link is set by the Central device when a connection is created with
the Peripheral device. The Peripheral should have a connection interval that matches the rate at which the
sensor data from the Peripheral is sent to the Central device. If the initial connection interval set by the Central
is lower than necessary, the Peripheral should request the Central to increase the connection interval to reduce
current consumption. This can be done after a connection is established by sending a "connection parameter
update request" to the Central.
4.2.2

Use slave latency

Slave latency is a Bluetooth® LE feature that allows a Peripheral to listen to the Central device on connection
events at a reduced rate. This is useful if the Peripheral device is inactive for some time and has to wait for
some activity to occur to send data to the Central device. If no activity is detected for some time, the Peripheral
can enter slave latency by sending a connection update request to the Central. The Peripheral can extend the
interval between connection events at which it listens to the Central. This allows the Bluetooth® LE device and
the host to be put into Deep Sleep mode for longer durations.
The key advantage of using slave latency is that when the Peripheral application detects activity, it can switch
the Bluetooth® LE device back ON to listen to the Central at the original connection interval until the data
transfer is completed. This avoids the latency in sending the data upon the first activity.
4.2.3 Bluetooth® LE parameters in Bluetooth® Configurator
Figure 10 Connection parameters in Bluetooth® Configurator
Application note 24 002-27910 Rev. *C
2023-05-29