How sent Notification from peripheral to Central using Stbluenrg2msp

[MCV.1]

Hi I using bluenrg2 m2sp chip as pheripheral role and st ble sensor App as a Central , i need to sent notification from peripheral to Central whenever event occur , con you share information , which api i need to use in order to sent notification from peripheral to client.

Regards

Manukumar