OLA Raspberry Pi
This tutorial describes how to get OLA running on the Raspberry Pi. The procedure described here is designed to get OLA up and running as fast as possible. If you don't trust the images below, or want to build everything from scratch, you can install an image from the Raspberry Pi Site and use the generic instructions for Installing OLA on Linux.
You'll need the following:
- A Raspberry Pi board. The Buying Guide
- An SD card. Check the SD Card Compatibility List but don't worry too much if your card isn't listed there. A 4GB card should be more than sufficient.
- An SD card reader. Make sure it supports the SDHC (high capacity) cards.
- A microUSB cable to provide power
- A CAT5 network cable.
- A Composite or HDMI monitor / TV to debug if things go wrong.
- A computer with a SSH Client and (optionally) Web Browser. You can use the Pi locally with a USB keyboard, but many people find it easier to access it from another machine.
Select your Image
At this point you need to decide what version of OLA you want to use. Images are here.
This tracks the Git Repo, which means you can always use the very latest version of the code. The downside of using this option is that you have the build the code yourself (which takes time) and sometimes the code can break.
Download the latest ola-git-NNNNNNNN.zip image.
The Debian Packages are built using Raspbian which is a customised debian environment for use on the Rasberry PI.
Use this option if you prefer a more stable system. The packages are usually updated once a month or so and you don't need to spend time building OLA from source.
Download the latest raspbian-ola-X.Y.Z.zip image.
The debian-ola-xxxx images are now depreciated.
If you're interested in the actual Debian packages (if you're building your own image from scratch) there are located here.
Copying the Image
Once you have selected an image, unzip it, and then you need to copy it to your SD card. The Raspberry Pi Wiki page has detailed instructions for each platform.
This can take a while if you have a slow SD Card (see SDHC Speeds). On my Linux machine with a Class 2 card it took 14 minutes to write the 3.9G image, a Class 4 card took 11 minutes.
Insert the card into the Raspberry Pi, make sure it's connected to a network which has a DHCP server running, and apply power. If you have a monitor attached you should see it booting. You'll then need to determine the IP address of your Pi. If you have a screen attached it should be shown just before the login prompt. Otherwise you can check your DHCP server logs and see which address was assigned. This example assumes an IP address of 192.168.1.200.
Login using SSH
From your other machine, start your SSH client and SSH to your Pi. On Linux or Mac you can use the Terminal application and type:
The password is 'openlighting' (no quotes).
If you're on Windows you can download PuTTY and use that.
You should see the login message and get a shell prompt. If that doesn't work, you may need to restart (pull the power and plug it in again). Sometimes the Pi gets into a weird state on the first boot.
By default, the image comes with a SSH Key installed for Simon to access the system. If you trust me (and your probably do since you're running my code) you can leave this on. Otherwise you can delete my key by running:
Next change the password:
passwd Changing password for ola. (current) UNIX password: Enter new UNIX password: Retype new UNIX password:
It's best to always use the latest version of OLA. To update your install follow one of the methods below, depending on what image you used.
Once you're logged in, run:
cd ola git pull autoreconf ./configure --enable-rdm-tests make sudo make install
This can take a while.
sudo apt-get update sudo apt-get upgrade
Differences from the default Debian Image
Here are the differences from the default Debian squeeze image. If you create your own install from scratch you probably want to do these as well.
- Many unused packages have been removed (samba, X, mysql, nfs etc.)
- OLA dependancies have been installed (microhttpd, libusb, etc.)
- The OLA git repo has been cloned into /home/ola/ola
- The pi account has been removed
- Root ssh access has been disabled
- The ola account was added and added to the dialout & plugdev groups
- /etc/rc.local has been modified to regenerate the ssh keys on the first boot
- Various other accounts have been removed (pnd, tli, buildbot etc.).
- Timezone changed to US/Pacific
- /etc/udev/rules.d/10-local.rules was updated according to OLA_Device_Specific_Configuration