Beginners problem uploading sketch

Projects Programming
1

Hi and thanks in advance. I'm new to Arduino and all related topics, but bought the "Getting Started" kit to try to learn at age 70. Uploaded the first sketch with no problem, (using copy/paste) but the second one hit a wall. Using an iMac with wireless mouse, I can verify the sketch but cannot upload it. I keep getting the message "Serial port '/dev/tty.Bluetooth-Modem' already in use. Try quitting any program that may be using it." I got the same message when I tried to modify the delay times in the first sketch. I quit everything I can find, but no luck. Advice on getting this program to upload needed.

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  1. Make sure the Serial monitor is closed before you upload (although I think it should close by itself)
  2. Try the other ports (in the Tools -> Serial Port menu). I dunno about macs, but 'Bluetooth-Modem' doesn't sound a whole lot like an arduino.
  3. Try rebooting the IDE
  4. Try rebooting your computer (I know it's not windows, but a reboot will make sure nothing else is using it)
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  1. Try rebooting your computer (I know it's not windows, but a reboot will make sure nothing else is using it)

at least in linux, its pretty anal about locking up a serial port ... though yes it sounds like the arduino software is not set to the correct serial port, or its setting itself up to the only serial port it sees.

one can look at the /dev/ folder and see what tty items are there, it should stand out from the normal ttyS0 type stuff like ttyUSB0 or ttyACM0 (not sure what a uno pops up as, but its not Bluetooth-Modem)