Hi! How can I find the compiled px4 firmware v1.15.4 for the Cuav X7pro+? There are two archives with only the source code - Release v1.15.4 - Stable Release · PX4/PX4-Autopilot · GitHub

hey, As we move versions, the previous builds are no longer available and you should build them for your board locally.

Easiest would be to download the github repo, checkout the tag git checkout v1.15.4and then compile for your flight controller. I’m not sure why they remove all previous binaries after a new release.

Thanks for your reply. It’s a shame the developers are removing them. Are they really that worried about wasting disk space?

This method seems obvious to me ) I thought maybe there was a firmware archive somewhere and I could just download the one I needed.

@vnr Please be kind, we are all contributors to an open source project with limited financial resources. Besides, this will encourage users to move to the lates versions. Although, we keep source code of previous versions.

The ARK Flow works on 1.16, I’m not sure what’s different about the mtf sensor that causes it to fail. I ordered one and will test it out.

And fwiw I do agree it would make sense to keep 2 stable versions around on S3. You could bring it up on the dev call.

Here’s a little quip about compiling 1.15.4 - can anyone tell me what I’m doing wrong? 1.16 compiles just fine using the same method. Below is the exact sequence of commands and what it all led to: $ cd ~ $ git clone --branch v1.15.4 --recursive $ cd PX4-Autopilot/ $ git checkout tags/v1.15.4 $ …

I believe this is related to gcc version. Roll back to 10-2020-q4-major

Thanks for the tip, it compiled perfectly.

Where is compiled px4 v1.15.4?

PX4 Autopilot

vnr November 14, 2025, 3:49am 7

If it weren’t for this annoying bug “ Optical Flow doesn't work on 1.16.x (latest) ”, I wouldn’t have even tried to switch to the old firmware.

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Where is compiled px4 v1.15.4?

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