# Problems with Bar30 and ArduSUB on Pixhawk 4 **URL:** \ **Category:** Blue Robotics Products\ **Created:** [October 5, 2021, 1:33pm UTC](https://discuss.bluerobotics.com/t/problems-with-bar30-and-ardusub-on-pixhawk-4/10745 "2021-10-05T13:33:12Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [October 5, 2021, 8:39pm UTC](https://discuss.bluerobotics.com/t/problems-with-bar30-and-ardusub-on-pixhawk-4/10745/5 "2021-10-05T20:39:59Z")
Hi @Hans12323, welcome to the forum 🙂 The Pixhawk 4 hasn’t been supported until very recently, so there isn’t a stable release for it. To use it with ArduSub you’ll need to use the Development release (ArduSub 4.2) or the Bar30 won’t work, as covered in this thread: > [@Leak Detector + Bar30 Firmware Pixhawk4](https://discuss.bluerobotics.com/t/leak-detector-bar30-firmware-pixhawk4/10143): > > Hi, I have been trying to get the leak detector and bar30 sensor working on my sub with a pixhawk4. I found this thread [Baro30 Pressure sensor and Pixhawk4](https://discuss.bluerobotics.com/t/baro30-pressure-sensor-and-pixhawk4/9847) which suggested that the Bar30 would not work with 4.0.X firmware but the issue was fixed on the dev build. After updating to the developer build, the Bar30 works, but the leak detector no longer works. Has anyone encountered this issue? Is there a fix or a config issue with the master that could change the way the leak detector connects? Th… --- _[View the full topic](https://discuss.bluerobotics.com/t/problems-with-bar30-and-ardusub-on-pixhawk-4/10745)._