0

Configuring the Pi for I2C

Author Gravatar Image KEVIN TOWNSEND
Before you can get started with I2C on the Pi, you'll need to run through a couple quick steps from the console.
Check out this tutorial for more details and follow it completely

http://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c

When you're done, run
Copy Code
sudo i2cdetect -y 0 (if you are using a version 1 Raspberry Pi)
sudo i2cdetect -y 1 (if you are using a version 2 Raspberry Pi)
This will search /dev/i2c-0 or /dev/i2c-1 for all address, and if an Adafruit BMP085 Breakout is properly connected it should show up at 0x77 as follows:
raspberry_pi_i2ctools_i2cdetect.png
Once both of these packages have been installed, you have everything you need to get started accessing I2C and SMBus devices in Python.
OVERVIEW HOOKING EVERYTHING UP
Last updated on 2014-04-18 at 07.06.26 AM Published on 2012-08-14 at 05.07.18 PM

RELATED GUIDES

FEATURED
Raspberry Pi Wifi-Controlled Cat Laser Toy
Make your own telepresence cat toy, perfect for exercising/torturing your favorite feline
Grab a Raspberry Pi, a webcam and two servos to make a Raspberry Pi-controlled laser for playing with your cat over the web.
Author Gravatar Image TONY DICOLA
MCP230xx GPIO Expander on the Raspberry Pi
Add 8 or 16 extra GPIO pins to your pia via I2C
Using the MCP230xx GPIO expanders on the Raspberry Pi to add 8 or 16 additional GPIO ports to your board.
Author Gravatar Image KEVIN TOWNSEND
Adding a Real Time Clock to Raspberry Pi
Keep time at all times with a real time clock
To keep costs low, the Raspberry Pi does not include a Real Time Clock module. Instead, users are expected to have it always connected to WiFi or Ethernet and keep time by checking the network. Since we want to include an external module, we'll have to wire one up. We'll go with the easy-to-use and low-cost DS1307.
Author Gravatar Image LADY ADA
Send Raspberry Pi Data to COSM
Save and Graph Analog Temperature Data
The combination of connecting a Raspberry Pi to COSM makes creating a internet of things much easier than it has been in the passed. The Pi with it's easy access to ethernet and COSM's drop dead simple usability will graph all sensor data you send to it. This tutorial explains how to connect a analog temperature sensor to the Pi and use a small python script to upload that data for storage and graphing on COSM.
Author Gravatar Image MIKEY SKLAR