Updating the firmware via USB if the manufacturer releases a patch.
| Issue | Likely Cause | Solution | | :--- | :--- | :--- | | | Port in use by other software | Close other projector apps or serial monitors. | | Command sent but no action | Incorrect Baud Rate | Try 115200 or 38400 instead of 9600 . | | Command sent, no action | Wrong Protocol | Change the Hex codes in the self.commands dictionary. | | Projector turns on but won't switch input | Timing issue | Projectors need 10-30 seconds to warm up before accepting input switch commands. Add a longer sleep() after power on. | egate projector driver