COM Port Troubleshooting

Check USB Drivers

1. Open Device Manager (Windows Search > Device Manager) and look for the Ports (COM & LPT) section.
2. You should see an entry under that heading corresponding to your RUMBA32 board. You can disconnect/reconnect RUMBA32 from USB to see if the entries in the list change.

3. If you see RUMBA32 in the Ports (COM & LPT) list, then it should be working - try the test sketch process again.
4. If you do not see RUMBA32 in the Ports (COM & LPT) group, it is possible that the wrong COM port driver has been installed. Look for RUMBA32 elsewhere in the Device Manager - particularly, check Universal Serial Bus devices.

5. If you find RUMBA32 somewhere other than Ports (COM & LPT), as shown above, we just need to change the driver to the correct one. Right click on RUMBA32, and click Update Driver. When prompted, select "Browse my computer for driver software".

6. "Let me pick from a list of available drivers on my computer"

7. Look for an entry named either USB Serial Device or STMicroelectronics Virtual COM Port.

8A. If you have that entry, select it and click next. The driver should update, and you should see RUMBA32 listed under Ports (COM & LPT) in device manager:

You should now be able to communicate with RUMBA32 from your host software.

8B. If you do not have either of these drivers available, you may need to download/install them. You can download the STMicroelectronics Virtual COM Port driver from this page - download and install the driver, then repeat this process.