# Pixhawk 4 - I2C sensors not found

**URL:** <https://discuss.bluerobotics.com/t/pixhawk-4-i2c-sensors-not-found/11507>\
**Category:** Sensors\
**Tags:** ardusub\
**Created:** [February 7, 2022, 5:36pm UTC](https://discuss.bluerobotics.com/t/pixhawk-4-i2c-sensors-not-found/11507 "2022-02-07T17:36:52Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**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:** [February 7, 2022, 6:59pm UTC](https://discuss.bluerobotics.com/t/pixhawk-4-i2c-sensors-not-found/11507/2 "2022-02-07T18:59:08Z")

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Hi @Guillaumeee,

> [@Problems with Bar30 and ArduSUB on Pixhawk 4](https://discuss.bluerobotics.com/t/problems-with-bar30-and-ardusub-on-pixhawk-4/10745/5):
>
> 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)

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