Difference between revisions of "Pi Lite"
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To enable the serial port for your own use you need to disable login on the port. There are two files that need to be edited '/etc/inittab' and '/boot/cmdline.txt' | To enable the serial port for your own use you need to disable login on the port. There are two files that need to be edited '/etc/inittab' and '/boot/cmdline.txt' | ||
| − | Edit 'inittab' and comment out the line 'T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100' using the '#'. | + | Edit 'inittab' and comment out the line 'T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100' using the '#'. Its at the end of the file |
<pre> | <pre> | ||
sudo nano /etc/inittab | sudo nano /etc/inittab | ||
Revision as of 16:18, 22 December 2013
The Pi-Lite is an LED matrix display designed for scrolling text and graphics. It connects directly into the Raspberry Pi GPIO ports and requires no hardware hacking [1]
Contents
Starting Point
The following assumes you have a working RPi set-up with the default user, see Setup_NOOBS
Installation
The Pi-Lite developer provides the full documentation [2] and user guide [3]
The following assumes you are logging into your Raspberry Pi via ans SSH terminal Enable_SSH#Connect_via_SSH_on_a_Local_network
Access to the serial port
By default the Raspberry Pi’s serial port is configured to be used for console input/output. Whilst this is useful if you want to login using the serial port, it means you can't use the Serial Port in your programs. The Pi-Lite requires access to the Serial Port.
To enable the serial port for your own use you need to disable login on the port. There are two files that need to be edited '/etc/inittab' and '/boot/cmdline.txt'
Edit 'inittab' and comment out the line 'T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100' using the '#'. Its at the end of the file
sudo nano /etc/inittab
Edit 'cmdline.txt' and delete the highlighted section dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
sudo nano /boot/cmdline.txt
Reboot your Pi.
sudo reboot
Minicom
sudo apt-get install minicom
Serial Port Access Group : DialOut
Add the pi user to the dialout group
sudo usermod -a -G dialout pi
GIT the code
Install the required tools
sudo apt-get install git python-serial python-setuptools pip
sudo pip install arrow sudo pip install xively-python
Clone the Pi-Lite GIT repository
cd ~ && git clone git://github.com/CisecoPlc/PiLite.git
Twitter Feed Installation
The Twitter module installation is a bit more involved
git clone git://github.com/bear/python-twitter.git cd python-twitter sudo pip install -r requirements.txt python setup.py build sudo python setup.py install
Example Python Programmes
List the examples with
ls ./
list of examples here
Run any of the examples using the script name
python PiLiteWeather.py
or
./PiLiteWeather.py
Developing your own uses
The Pi-lite developers offer a user graphical interface for emulating the Pi-Lite, thisi is useful for development and experimentation.
see 'Python_Examples/PiLiteEmulator.py'
