Serial cable direct from host PC to Arduino
#1 is a surface mount
#2 is a recently purchased old chip -style (dual inline chip)
#1 programs fine on COM3
I unplug #1, COM3 disappears according to IDE.
I plug the same cable into UNO #2 (already powered up and running factory BLINK routine)
IDE hooks up as COM4 (??)
avrdude: ser_open(): can’t open device “\.\COM3”: The system cannot find the file specified.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
I have been through troubleshooting as suggested and I have read the forum for history. If there is any I can’t find it.
So… any clues as to what is going on?
thanks in advance…