# Can't program my ATmega32u4

**URL:** <https://community.sparkfun.com/t/cant-program-my-atmega32u4/24453>\
**Category:** MicroMod\
**Tags:** avr-atmel\
**Created:** [June 20, 2012, 5:05am UTC](https://community.sparkfun.com/t/cant-program-my-atmega32u4/24453 "2012-06-20T05:05:28Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Chris\_F](https://avatars.discourse-cdn.com/v4/letter/c/fbc32d/32.png) [@Chris\_F](https://community.sparkfun.com/u/Chris_F)\
**Post date:** [June 20, 2012, 5:05am UTC](https://community.sparkfun.com/t/cant-program-my-atmega32u4/24453/1 "2012-06-20T05:05:28Z")

</div>

I just got my ATmega32u4 today and I tried to upload a simple test program with avrdude and all I’m getting is:

> avrdude: ser\_open(): can’t open device “/dev/ttyACM0” Input/output error
> 
> Eavrdude: butterfly\_recv(): programmer in not responding

Breakout board: [http://www.sparkfun.com/products/11117](http://www.sparkfun.com/products/11117)

Command line: sudo avrdude -p m32u4 -P /dev/ttyACM0 -c avr109 hello-avr.out

dmesg output: cdc\_acm 5-2:1.0: ttyACM0: USB ACM device

OS: Linux Mint 13.0

---

<div class="post-metadata">

**Author:** ![stevech](https://avatars.discourse-cdn.com/v4/letter/s/ba8739/32.png) [@stevech](https://community.sparkfun.com/u/stevech)\
**Post date:** [June 21, 2012, 5:09am UTC](https://community.sparkfun.com/t/cant-program-my-atmega32u4/24453/2 "2012-06-21T05:09:38Z")

</div>

the fellows on [avrfreaks.net](http://avrfreaks.net) forum will be glad to help.