Hi!
I have a fully assembled Peggy2LE board that lights up all the LEDs when I power it up and turn it on, but when I plug it into my computer with the TTL - USB cable to upload a program on it with Arduino, nothing happens!
It is not even showing up as a new device plugged into the computer, as my Arduino Uno (with the same ATMega 328 chip) does.

I have searched all over for a solution and read many troubleshooting guides, but can't seem to find a fix.

I will love you forever if you offer a solution!!! This is for a school final due on Monday.

Thanks!!!

The USB-TTL cable should show up in your device manager, whether or not you've got it plugged into the Peggy-- you may or may not get a "new device" message with this kind of thing.

In the Arduino program, make sure that board type is selected from the menu as "Duemilanove with '328" or the closest selection to that-- uno as board type will not work.

Make sure that the Peggy has power on when you try to program it, and make sure that the USB-TTL cable is oriented correctly-- check the color coding on the board (black/green).

just wanted to not be anonymous!!

I am using a Mac, so I don't have a device manager, but it is definitely not showing up in my Finder or anywhere else.

I have the Duemilanove 328 board selected, but the serial port options are definitely not right. They all say Bluetooth.

I have the cable plugged in according to the instructions on the Peggy.

Is there anything else that could possibly be preventing this from working? I am at a complete loss.

Thank you so much!!

>I am using a Mac, so I don't have a device manager

Since you said "It is not even showing up as a new device plugged into the computer" (normally a windows affliction) I assumed otherwise. That's okay-- these things are almost always easier on a Mac.

First, open up a terminal window on your computer. ( Applications > Utilities > Terminal.app )

Next, unplug your USB-TTL cable from the Peggy and from your computer. Next, plug it into the computer, leaving it disconnected from the Peggy.

In the terminal, type: ls /dev/cu.* (and return)

That should list the available serial interfaces. If things are working correctly, you should see a list including bluetooth interfaces and the "usbserial" interface, which is your cable.

- If you do not see any usbserial interface in the list, then either your cable is bad or you may need to reinstall the FTDI VCP ("virtual com port" drivers.

- If you do see the usbserial interface listed, then the cable is working okay and your computer can see it okay. From there, select that port in the Arduino menu, and try programming your Peggy.

Thank you sooooo much!! I installed the FTDI driver and it worked. What a relief. I really appreciate the help!!!!