Jump to content

*solved* Can't talk to UMO/Arduino


Recommended Posts

Posted (edited) · *solved* Can't talk to UMO/Arduino

Edit: This post now serves as guide for others with the same problem. Skip down for solution

Hi all,

Today I wanted to check for firmware updates/reload firmware to get default accelerations values(in case that was causing the print trouble). I also wanted to level my bed using Cura.

But, couldn't connect to printer. My computer made the hardware connected sound, it shows in device manager, but my UMO never did the Bzzzt + white squares routine it does when connected over USB. Tried multiple computers, multiple cables, different Cura versions, nothing. Troubleshooting pages on the site suggested taking Arduino off the shield. Didn't help either.

The Arduino Mega 2560 (COM3) shows in Device monitor. Uninstalled drivers, reinstalled using Cura.

Went for manual firmware upload through Arduino IDE, it sees COM3, it recognizes Arduino Mega 2560, but when uploading, error:

avrdude: ser_open(): can't open device "\\.\COM3": The device is not connected.

avrdude: ser_drain(): read error: The handle is invalid.

The thing is, my printer actually still "works". But I just want it to be able to talk to my computer. I know I can level using other ways, but for firmware updates, Protoface UI testing etc etc.

I searched the forum, and the internet, found different topics of people who seem to have bricked their Arduino, but nothing similar. Help!



Ofcourse a minute later I find this post with some random procedure that works.... I suspect somehow somewhere something was mysteriously also occupying COM3. HOWEVER, it was also the case on my laptop, which makes me think it was something inside the Arduino. Though I have no clue what it could be. Anyway, I followed the procedure and picked a high number @ step 8. Now Cura talked to the Arduino and I could upload firmware etc.

1. device manager

2. select ports

3. select port of arduino board examle : com1 ... com3 whatever it is

4. right click on com.

5. select properties

6. tab- port settings

7. click advanced

8. com port number- select new port number that is not in use.

9. confirm..

Edited by Guest
  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 48 replies
    • Create New...