Inter-Integrated Circuit (I²C)

• Pronounced "Eye Squared See"
• A hardware communications protocol which allows us to simply and efficiently transfer data between multiple devices.
• Basics of the I²C Communication Protocol: A good primer to understand how the actual protocol works.

To determine the I²C address of a device connected to the TX2 on Ubuntu:

• sudo apt-get install libi2c-dev i2c-tools
• sudo i2cdetect -y -r 0

The device address will be shown in the table output as a two digit hex character (ignore u characters).

In python, we use the python-smbus package, which you can find some docs for here.

Quick and dirty guide to the pin layout used on the carrier board we use for the Nvidia Jetson TX2.

1	2
3	4
5	6
7	8
9	10
11	12
13	14
15	16
17	18
19	20

Pin 11: SCL: Serial Clock

Pin 12: SDA: Serial Data

Pin 20: GND: Ground