Install the i2c-tools and python-smbus packages to complete the I2C setup:
The following commands can be used to install the packages:
sudo apt-get install i2c-tools
sudo apt-get install python-smbus
Finally add the pi user (or whatever login required) to the I2C access group.
The following command can be used to accomplish this:
sudo adduser pi i2c
Use the following command to see what devices are connected to the I2C bus:
i2cdetect -y 1
Note: use the following command if you are using a model A Raspberry Pi
The I2C address (in hexadecimal) of the temperature sensor should show up if properly connected.