Hi, Is it possible to add time with each mission item? Actually I want to use timestamp as a trigger to move the quadrotor from current mission item to next mission item.
You could try to do something with loiter time: https://mavlink.io/en/messages/common.html#MAV_CMD_NAV_LOITER_TIME
But I think what you want is not really implemented.
Alternatively, you could use offboard or goto control and do the timing on the ground or a companion computer.