Lilypad USB - Unkown Device

Development Tools IDE 1.x
1

Yesterday my Lilypad USB was a happy clam. Today Windows says it's an "Unknown Device". Trying a new Lilypad USB did not work either.

  • Lilypad USB
  • Windows 7 Professional, x86
  • Laptop, USB 3.0
  • Arduino 1.0.5-r2
  • LilyPad Power Supply, DEV-11259

However, hitting the reset button twice connects for about 10 seconds as "Arduino Lilypad USB Bootloader". Then it returns to the "Unknown Device" status.

I have tried the following:

  • 3 different USB Cables
  • A new "Lilypad USB"
  • different laptop running windows 8
  • reboots
  • re-installs of the 1.0.5-r2 IDE
  • Arduino 1.5.6-r2 BETA

What could I try next?

Thanks in advance.

2

Today i tried a brand new LilyPad USB. The board was recognized. I uploaded a sketch. Now the "Device Unknown" issue has returned with the new board.

The lilypad was only connected to the USB cable. Could there be an issue with my code or how i am uploading the sketch?

I have the following settings:

  • Tools->Board->Lilypad Arduino USB
  • Tools->Serial Port->COM4
  • Tools->Programmer->AVRISP mkII (is this setting wrong?)

Could i have erase something important on the board?

3

This resolved my problem. I hope it can be of use to someone else.

Try the following:

Prepare the basic empty program (empty setup, loop, etc.)
Compile it.
Reset the Arduino using the hardware button on the chip
Press Ctrl + U to upload your code.
If unsuccessful - got to 3.
There is a delay before the boot loader starts the programs, just work on your timing. It worked for me when a bug in my Arduino's code was executing a soft reset every 500 ms.