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Signed-off-by: Ramon Roche <mrpollo@gmail.com>
Co-authored-by: Ramon Roche <mrpollo@gmail.com>
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# Raspberry Pi - ROS installation
This is a guide on how to install ROS-indigo on a Raspberry Pi 2 serving as a companion computer for Pixhawk.
## Prerequisites
* A working Raspberry Pi with monitor, keyboard, or configured SSH connection
* This guide assumes that you have Raspbian "JESSIE" installed on your RPi. If not: [install it](https://www.raspberrypi.org/downloads/raspbian/) or [upgrade](http://raspberrypi.stackexchange.com/questions/27858/upgrade-to-raspbian-jessie) your Raspbian Wheezy to Jessie.
## Installation
Follow [this guide](http://wiki.ros.org/ROSberryPi/Installing%20ROS%20Indigo%20on%20Raspberry%20Pi) for the actual installation of ROS Indigo. Note: Install the "ROS-Comm" variant. The Desktop variant is too heavyweight.
### Errors when installing packages
If you want to download packages (e.g. `sudo apt-get install ros-indigo-ros-tutorials`), you might get an error saying: "unable to locate package ros-indigo-ros-tutorials".
If so, proceed as follows:
Go to your catkin workspace (e.g. ~/ros_catkin_ws) and change the name of the packages.
```sh
$ cd ~/ros_catkin_ws
$ rosinstall_generator ros_tutorials --rosdistro indigo --deps --wet-only --exclude roslisp --tar > indigo-custom_ros.rosinstall
```
Next, update your workspace with wstool.
```sh
$ wstool merge -t src indigo-custom_ros.rosinstall
$ wstool update -t src
```
Next (still in your workspace folder), source and make your files.
```sh
$ source /opt/ros/indigo/setup.bash
$ source devel/setup.bash
$ catkin_make
```