next topic »

[on:]

HI,

does anyone know the default USB settings for the arduino USB board in Mac OSX? I have a choice of
dev/tty.usbserial-191    or
dev/cu.usbserial-191

and then port speed choices of
9600, 19200 or 115200.
Thanks for any help you can provide...

[Reply #1 on:]

Either /dev/tty.usbserial-191 or /dev/cu.usbserial-191 should work.

Port speed is probably 19200, unless you have an old board, in which case you want 9600.

Make sure you reset the board before uploading.

If you still have problems, check the FAQ:
http://arduino.berlios.de/index.php/Main/FAQ
or reply here.

[Reply #2 on:]

Thanks,

I had already read the FAQ, the FTDI installation docs for the driver, and  some of the datasheet for the FTDI drivers. None of these gave the answer.

After some experiementaiton, I found it works with these settings:

   dev/tty.usbserial-191    9600 baud
or dev/cu.usbserial-191     9600 baud

The board is a pre-built USB Arduino, bought from the workshop at SFU in Vancouver. I am running the Arduino 0003 IDE on Mac OS X,  10.3.8.

So the answer is that, for me at least, it works absolutely perfectly on 9600, but is absolutely dead on 19200. Strange.  Anyway, It works now!

Daniel

[Reply #3 on:]

Sorry, I just realized this post should be in the 'troubleshooting' section.. perhaps the admin can move it?

[Reply #4 on:]

Hej,

the boards distributed in the SFU workshop have the bootloader version 3, that uploads programs in the board at 9600. You cannot change it unless you reprogram the board. However it is not really needed.

On the other hand, when making a program, if you use the serial port (with the "beginSerial(speed)" command, you can adjust that speed far over 9600.

The communication speed and the program uploading speed are independent from each other.

/David