# Issues flashing IO firmware on Pixhawk 6X baseboard

**URL:** <https://discuss.px4.io/t/issues-flashing-io-firmware-on-pixhawk-6x-baseboard/42140>\
**Category:** Pixhawk\
**Created:** [October 27, 2024, 3:14pm UTC](https://discuss.px4.io/t/issues-flashing-io-firmware-on-pixhawk-6x-baseboard/42140 "2024-10-27T15:14:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rop\_lender](https://discuss.px4.io/user_avatar/discuss.px4.io/rop_lender/32/17658_2.png) [@Rop\_lender](https://discuss.px4.io/u/Rop_lender)\
**Post date:** [October 27, 2024, 3:14pm UTC](https://discuss.px4.io/t/issues-flashing-io-firmware-on-pixhawk-6x-baseboard/42140/1 "2024-10-27T15:14:37Z")

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Hello Dev Team/ everyone, I hope you all are doing great.

We have designed a baseboard using the 6X schematic that was provided in the PX4 Holybro.

We have fabricated the baseboard, and when we connect the baseboard alone, only 2 green lights are flashing without blinking.  
It is not detected from the device manager and so from Qgroundcontrol since there are no firmwares that were loaded on the STM controller.

We have followed these steps.  
[Bootloader Update | PX4 User Guide (v1.14)](https://docs.px4.io/v1.14/en/advanced_config/bootloader_update.html),

wherein we tried to flash both the 6X and the baseboard that we fabricated by creating the bootloader file using the above steps.  
We got the following messages:

 ![WhatsApp Image 2024-10-25 at 22.43.48_41876eff](https://discuss.px4.io/uploads/default/original/3X/5/9/5918875f6c56db6d67d18a81de8ff8a9d198b955.jpeg)  
not showing done…  
 ![WhatsApp Image 2024-10-25 at 22.08.56_2bcaba92](https://discuss.px4.io/uploads/default/original/3X/a/5/a59d2e76e8537199d3e6aeb367ad92916b59a738.jpeg)  
Additionally, we got the timeout error in the “Qdsupport” response along with the “VMustReplyEmpty” error in gdb 9.1 version.  
This method was also tried [Remote replied unexpectedly to ‘vMustReplyEmpty’ · Issue #9 · pulp-platform/debug\_bridge · GitHub](https://github.com/pulp-platform/debug_bridge/issues/9)  
and we downgraded to \>7.7, we got a Cmake errors.

How can we flash the baseboard alone using the STM Debugger [PX4-Autopilot/src/modules/px4iofirmware at main · PX4/PX4-Autopilot · GitHub](https://github.com/PX4/PX4-Autopilot/tree/main/src/modules/px4iofirmware)  
If we try with the bootloader, we got the above-mentioned error when we tried connecting via FMU debugger whilst connecting with the stock controller on the fabricated board.

Ubuntu OS version 20.04.

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**Author:** ![Yatharth\_Agarwal](https://discuss.px4.io/user_avatar/discuss.px4.io/yatharth_agarwal/32/15753_2.png) [@Yatharth\_Agarwal](https://discuss.px4.io/u/Yatharth_Agarwal)\
**Post date:** [February 28, 2025, 1:44am UTC](https://discuss.px4.io/t/issues-flashing-io-firmware-on-pixhawk-6x-baseboard/42140/2 "2025-02-28T01:44:36Z")

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Hi,

Were you able to find a solution? I am currently facing the same issue.

Thanks for the help!

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**Author:** ![Hitesh\_Bhoyar](https://discuss.px4.io/user_avatar/discuss.px4.io/hitesh_bhoyar/32/21514_2.png) [@Hitesh\_Bhoyar](https://discuss.px4.io/u/Hitesh_Bhoyar)\
**Post date:** [May 2, 2026, 5:00pm UTC](https://discuss.px4.io/t/issues-flashing-io-firmware-on-pixhawk-6x-baseboard/42140/3 "2026-05-02T17:00:32Z")

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Hello Yatharth, have you found any solution regarding this firmware upload on custom baseboard, If so can you please help me I will be thankful to you..