I've just started. I have loaded the IDE and connected my new Arduino Duemilanove ATmega328. I set the board but when I go to set the Serial Port /dev/tty.usbmodem..... is not on the list. As per the Trouble shooting I have tried powering off and on with the Arduino connected. Trying starting the IDE with and without the Arduino plugged in. I search through the forum but the only other similar problem didn't appear to be the same as mine.
I am using a Mac Book Air with all latest software updates. I have tried it connected to both USB Ports.
Two other things I have noticed. On the Arduino not only is the green power LED alight, but a Red LED labeled L continually flashes - I wasn't expecting this. The second thing I have noticed is when opening up the IDE a window flashes up beforehand and disappears - is this an error window - I never catch what it says before it disappears and is replaced by the IDE window.
The port is not listed so it has no permissions associated. In respect of the LEDs. I can identify the PWR Led and and the TX and RX LEDs, So I assume that the Led that is Red and flashing is the Status LED,but is labelled L.
Well, if you know that the file/group settings of the modem device are wrong why not change them then? Put yourself into the right group to gain RW permissions and to create a lock file. Probably something like 'uucp' and/or 'dialout' and/or 'lock'.
I am not sure I understand what you are describing to me. I have attached a screen shot that perhaps may describe better what I see, and perhaps you could then guide me through what you are saying.
Read some more and realised with a Arduino Duemilanove ATmega 328 I needed to download a driver. When I did that everything was fine.
The RED LED is the Status LED and was flashing because Blink was the last program loaded.
I am a total Newbie to this but have same Arduino Duemilanove ATmega 328 and same problem description that you had. Could you kindly tell me where to download the driver and how to do so?
Sorry for that.