# Can't update Flight Core v2 FW using QGC

Source: https://forum.modalai.com/topic/1697/can-t-update-flight-core-v2-fw-using-qgc
Category: Flight Core and Legacy VOXL (https://forum.modalai.com/category/9/flight-core-and-legacy-voxl)
Tags: flight-core-v2
Posted: 2023-01-12 18:04:04 UTC by modaltb (ModalAI staff)
Replies: 2 · Views: 816

## modaltb (ModalAI staff) · 2023-01-12 18:04:04 UTC

When attempting to update the Flight Core v2 firmware with QGC 4.2.x (perhaps other versions as well) on Ubuntu or OSX, the upgrade always fails with a warning like:

![ae44a93f-1de5-428b-accc-56b07dca0290-image.png](https://forum.modalai.com/assets/uploads/files/1673546641511-ae44a93f-1de5-428b-accc-56b07dca0290-image-resized.png) 

As a work around, you can upgrade over the same USB port using a simple python script from the PX4 Tools that are maintained by the PX4 community.  Please see info here:

https://docs.modalai.com/flight-core-v2-firmware/#how-to-upgrade-using-px_uploader-tool

## Reply by Jetson Nano · 2024-04-12 05:48:43 UTC

@modaltb Which is the default port flightcore V2 connects to? In may case I'm using Ubuntu 20 distro.

## Reply by tom (ModalAI staff) · 2024-04-12 17:15:37 UTC (in reply to Jetson Nano)

@Jetson-Nano Each host pc will be different depending on what peripherals you have plugged in. Run `sudo dmesg -wH` and plug in your flight core, you should see which port it enumerates on in the dmesg output