Set Up Your Raspberry Pi and Hardware

Assemble your Raspberry Pi with the red Raspberry Pi Bridge.   The bridge has a rectangular header underneath that fits on top of the GPIO pins on your Raspberry Pi.  It's vital that the Pi Bridge is place correctly.  The pictures below demonstrate proper placement.


If the bridge is placed correctly and the Raspberry Pi is powered, the red LED in the upper-left by "3.3V" will turn on.  Next, connect a Chip Snip wire module (plug end) to the socket mounted on the red Pi Bridge.

The wire module will make it much easier to work with your sensors when they are connected to the opposite end of the wire module.

Enable the Raspberry Pi I2C port

The Raspberry Pi has a special communications port to receive data our red Raspberry Pi Bridge.  We will need to make sure it is enabled.

To do this, open a terminal window from the top-bar menu.

once open, type in

sudo raspi-config

Like this

Now hit the "Enter" key.

The terminal will now have a blue and gray screen like the one below.  Use the down arrow on your keyboard to select "Interfacing Options" and hit "Enter" again.

The screen will change.  Now select the "P5 I2C" option and hit "Enter."

Finally, select "Yes" with the side-arrow key and hit "Enter."  The confirmation screen below should show up.  Hit "Enter" again.

Next, use the right-arrow key to select "Finish" and hit "Enter" one last time.

The terminal window will return to a command line prompt.

To verify the I2C port is enabled and can access your Pi Bridge, execute the command

sudo i2cdetect -y 1

The terminal window will display a matrix of I2C addresses that it detects.  If you see "4d" in row "40" column "d", you've successfully configured your hardware.

You're Done!