PermissionError: [Errno 13] Permission denied: '/dev/ttyUSB0' /******领卓**********/

("/dev/mychar",os.O_RDWR) PermissionError: [Errno 13] Permission denied: '/dev/mychar' ser = serial.Serial("/dev/ttyUSB0",115200)PermissionError: [Errno 13] Permission denied: '/dev/ttyUSB0' su
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