reset

If I buy a used Spark from another Person is there a way to reset the Spark so that I can change the DJI Account and the name basically to set it up like a new Spark? THanks for the help and greetings from Austria

I just got the Spark Fly-More package. Spark and controller are updated through DJI Assistant 2, controller is connect to Spark (green light). Phone is connected to controller. In DJI Go 4 i can enter the aircraft, but I have no picture and the status line at the top says "Disconnected."...