Broadcast Interval

The broadcast interval is the time in which the application is "advertising" the BLE data. The settable value is from 20 ms to 1024 ms. The maximum value of broadcast interval of RF-star modules is 5 s. Because the broadcast interval is the main factor affecting the power consumption. The bigger the broadcast interval, the lower the power consumption. 

However, if the module enables a bigger broadcast interval, the connection establishment and the scan operation will work slowly. Under the broadcast interval of 5 s, there may be no connection that can be built. RF-star recommends the maximum broadcast interval is 2 s.

Connection Interval

The connection interval is the time between two data transfer events (BLE connection events) between the central and peripheral device. The settable value is from 8 ms to 425 s. The default connection interval between RF-star modules is 20 ms. The connection interval between the BLE module and mobile phone will be different. The default minimum connection interval of the iOS system is 30 ms, and Andriod can reach 20 ms or less.