I use a bas service and a custom service for the sdk14.2 52832 master. PM_EVT_CONN_SEC_SUCCEEDED happens once after the first connection, but every connection on the second connection and behind it happens twice. I call pm_conn_secure on every service discovery, that is, I call twice, refer to the central hrs example. Cheng wrote, I do not understand is that the call will have a PM_EVT_CONN_SEC_SUCCEEDED event, or. . . Why is the first connection different from the one after it?