PiGlow

Buy from Pimoroni.

Install

Instructions based on the RaspberryPi.org PiGlow Learning Article

sudo apt-get update
sudo apt-get upgrade

Install smbus with the following command:

sudo apt-get install python-smbus

Check you have it installed correctly by entering:

sudo python -c "import smbus"

No output is good news.

Enable I2C driver modules

1. Edit the modules configuration file:

   sudo nano /etc/modules
   

2. Then add the following line at the end of the file, if it's not already there:

   i2c-dev
   

   Press CTRL + X, followed by Y and Enter to save your changes.

3. Enter sudo raspi-config to open the Raspberry Pi Configuration Tool.

4. Select Advanced Options and then choose I2C with the keyboard's up/down keys. Enable the I2C interface and kernel module when prompted, and you'll be prompted to reboot the Pi when finishing.

Python Module

We'll use the PyGlow python module.

git clone https://github.com/benleb/PyGlow

Move/copy examples out of their directory to run them

mv examples/test.py .
sudo python test.py

It should ask you to enter a series of colour values.

Note that for the cpy.py example, you'll need psutil:

sudo apt-get install python-psutil