> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/manifold-5l-and-manifold-5s-ethernet-switch/connection-information/i2c.md).

# I2C

The Manifold 5S has two I2C ports usable when the Brain option is installed.

<figure><img src="https://2631968956-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMOwwlJpMRiOJF7MSvf2%2Fuploads%2Fs2HRJcHW1PL0UBDkt8Di%2Fimage.png?alt=media&amp;token=c592c4f2-7eb3-4a90-b64f-b66a6bb6571a" alt=""><figcaption></figcaption></figure>

Pinout of the I2C connectors follow the Blue Robotics connector standard.&#x20;

<figure><img src="https://2631968956-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhMOwwlJpMRiOJF7MSvf2%2Fuploads%2Fqpz82ISgkiOcaFs78wzh%2Fimage.png?alt=media&amp;token=3769f633-8996-4243-9f31-19d9f0201e97" alt=""><figcaption></figcaption></figure>

Currently, only one I2C driver is available, and it supports any one of the Blue Robotics pressure/temperature sensors (BAR02, BAR30, BAR100). Only one of these can be attached at any one time.