# PX4 Community Q&A: August 30, 2023

**URL:** <https://discuss.px4.io/t/px4-community-q-a-august-30-2023/33939>\
**Category:** PX4 Autopilot\
**Created:** [August 23, 2023, 5:01pm UTC](https://discuss.px4.io/t/px4-community-q-a-august-30-2023/33939 "2023-08-23T17:01:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rroche](https://discuss.px4.io/user_avatar/discuss.px4.io/rroche/32/17635_2.png) [@rroche](https://discuss.px4.io/u/rroche)\
**Post date:** [August 23, 2023, 5:01pm UTC](https://discuss.px4.io/t/px4-community-q-a-august-30-2023/33939/1 "2023-08-23T17:01:05Z")

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# August 30, 2023

## Join us

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>
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## Agenda

- Community Announcement
- Community Q&A
- General Discussions

## 📢 Community Announcement

* * *

### A.1 :

## 🧑‍🤝‍🧑 Community Q&A (No deep technical discussions)

* * *

### ❗ Guideline for asking a Question

1. Specify what you are trying to **achieve**
2. Specify what environment / **platform** you are using
3. Prepare a **Link** or **Document** to help understand if possible
4. First, ask the question on **Discord** or [create a **Github Issue**](https://github.com/PX4/PX4-Autopilot/issues/new/choose)!
5. If you take over 5 minutes for the question, please continue in Discord or a Github Issue.

### Q.1 :

## 🤔 General Discussions

* * *

### D.1 :

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<div class="post-metadata">

**Author:** ![Jaddu](https://discuss.px4.io/letter_avatar_proxy/v4/letter/j/ebca7d/32.png) [@Jaddu](https://discuss.px4.io/u/Jaddu)\
**Post date:** [August 30, 2023, 3:08pm UTC](https://discuss.px4.io/t/px4-community-q-a-august-30-2023/33939/2 "2023-08-30T15:08:22Z")

</div>

Hi,

We are trying to make a custom board run px4, based off pixracer [px4\_fmu-v4].  
Currently Using px4-dev-nuttx container for development.  
Bootloader operates and connects with QGC, but after flashing the custom PX4 stack, USB does not start. Serial Debug port is okay, and log is visible.  
there are some issues that we need help with.

1. Bypassing the VBUS for PX4, this has disabled the USB initialization for PX4 after PX4 image flashes.
2. Adding new flash memory device to MTD
3. Using non-mavlink communication with external system [arm mcu] over UART.