Assuming your referring to the DJI Controller or Smart Controller connected to the craft. There is an area in both controllers where you can press “Update Firmware” forcing the unit to check for latest Firmware and apply. There are other “Updates” to check as well for craft and battery. It’s been awhile since I used the DJI controller to to tell you exactly where it is located, but I found it easy to locate. I use the Smart Controller now.