# CAN support dropped?

Source: https://forum.modalai.com/topic/4671/can-support-dropped
Category: Flight Core and Legacy VOXL (https://forum.modalai.com/category/9/flight-core-and-legacy-voxl)
Tags: flight-core-v2
Posted: 2025-08-12 22:54:59 UTC by Ansel Misfeldt
Replies: 3 · Views: 1313

## Ansel Misfeldt · 2025-08-12 22:54:59 UTC

Hello, we've used many Flight Core v2's in UAVs over the years, often with ARKFLOW over CAN.  However, current builds recently seem to have dropped functionality for CAN sensors (optical flow, GPS, compass data).  Was this intentional or did something accidentally get changed in the firmware?

We're specifically trying to use a Flight Core v2 paired with a VOXL 2 because we need CAN interfaces for sensors.

Our main software engineer has been struggling (30 hours and counting) to compile the branch to add in UAVCAN support without generating secondary errors.  So I thought it was worth checking here to see if CAN support was intentionally dropped or if we're missing a place where a firmware is available that supports UAVCAN.

Thanks in advance for any insight or suggestions I can relay to them.

## Reply by hula · 2025-08-13 03:04:30 UTC

@Ansel-Misfeldt I, too, needed to enable UAVCAN so that I could connect a Here 3 GPS to the FCv2. I was able to modify the board's "default" file to re-enable UAVCAN. Happy to step you through it, just send me a DM.

## Reply by Eric Katzfey (ModalAI staff) · 2025-08-13 14:51:06 UTC

@Ansel-Misfeldt Please take a look at this post: https://forum.modalai.com/topic/4653/uavcan-error-while-building-px4-firmware/2?_=1755096615166

## Reply by Ansel Misfeldt · 2025-08-13 14:51:18 UTC (in reply to hula)

@hula Would very much appreciate that, however, I don't see a way to send a DM to another use.  Feel free to DM me if I'm missing something or point me in the right direction here on this topic!

Very much appreciate any help!