View source for Setting up ROS on a Raspberry Pi (intended to be the Rover -- OpenMower)

== Steps to install Raspberry Pi 4 with Ubuntu 20, ROS 1 and OpenMower ==

* Use this as guide https://x-tech.online/2022/01/installing-ros-noetic-on-a-headless-raspberry-pi-4-with-ubuntu-20-04/
** Use the Raspberry Pi official imager
** Use '''Ubuntu Server 20.04.4 LTS (RPI 3/4/400)''', '''64 bit''' for the RPi4 (or the latest LTS version of Ubuntu Server 20, it should probably work, since ROS Noetic is runnining on Ubuntu 20)
**Follow the guide, doing upgrades before ROS install, sudo apt update, sudo apt upgrade
*To get the ROS environment right in all your bash terminals: <code>echo "source /opt/ros/noetic/setup.bash" >> ~/.bashrc</code>
*Log out and in again to have ROS sourced in bash
*Follow instructions in <code>https://github.com/ClemensElflein/OpenMower/tree/main/ROS</code>
**Clone main repo, recursively <code>git clone --recurse-submodules https://github.com/ClemensElflein/OpenMower</code>
**<code>sudo apt install python3-rosdep</code>
**<code>sudo rosdep init</code>
**<code>rosdep update</code>
**<code>cd ~/OpenMower/ROS/</code>
**<code>rosdep install --from-paths src --ignore-src -y</code>
*<code>catkin_make</code> to build OpenMower. '''Note:''' Due to a missing <code>dependency</code>, you may need to do it 3-4 times before getting success. If continued application of catkin_make does not work, try using <code>catkin_make -j1 -l1</code> a few times as well.

=== A note on Wifi ===
The instructions here work for installing an Ubuntu 20 with Wifi enabled: https://x-tech.online/2022/01/installing-ros-noetic-on-a-headless-raspberry-pi-4-with-ubuntu-20-04/. However, it takes one or two boots ''before'' the Pi comes up on Wifi. So use a terminal or ssh for the first couple of boots.