To change the connection interval from the RL78/G1D after the connection has beenis established, use the "RBLE_GAP_Change_Connection_Param" function to request that the remote device change the connection interval (whether change requests are accepted depends on the implementation of the remote device).
Please refer to the following manual for the API specification and message sequence chart of this function.
Bluetooth® Low Energy Protocol Stack API Reference Manual: Basics (R01UW0088)
- 5.2.24 RBLE_GAP_Change_Connection_Param
- Appendix A Message Sequence Chart
A. 12 Connection Parameter Update Procedure - Peripheral request