Sorry for delay, have passed the problem to our engineers team, below is the answer from them, pls kindly check: Sorry, the information you offered is still unable to determine an effective modification plan. It is recommended that you create a new Activity synchronously, including the projector, and then see if the projector can be turned on or off normally. If the new Activity is OK, it may be that the original Activity setting process is set incorrectly If the new Activity has the same problem, it may be that the device is abnormal when the Activity executes the command sequence. We will check the code base data and optimize the Activity, tks for your patience.