hi guys need help here. what does it means? avrdude: ser_open(): can't open device "\.\COM16": The semaphore timeout period has expired. processing.app.debug.RunnerException at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:129) at processing.app.Sketch.u…

example sketch upload error

Topic		Replies	Views
avrdude: ser_open(): can't open device "\\.\COM3": The semaphore timeout period IDE 1.x	1	5744	May 5, 2021
uploading IDE 1.x	2	547	May 5, 2021
error General Guidance	3	513	May 5, 2021
avrdude: ser_open(): can't open device "\\.\COM5": The semaphore timeout period IDE 1.x	6	20980	May 5, 2021
"SEMAPHORE TIME OUT PERIOD HAS EXPIRED" PROBLEM UPLOADING PROGRAM IDE 1.x	3	4522	May 5, 2021