This instruction covers the installation of ROS Kinetic on the Raspberry Pi 2, 3, or 4 with Raspbian Jessie, Stretch, or Buster. However as final repositories are available now, today it is faster and easier to use Ubuntu Mate 16.04 (Xenial, download here) together with the standard ARM installation instructions here. An SD Card Image with Ubuntu 16.04 (LXDE) and ROS Kinetic installed can be downloaded here for the Raspberry Pi 3.

This instruction covers the installation of ROS Melodic on the Raspberry Pi with Raspbian Buster. However as final repositories are available now, today it is faster and easier to use Ubuntu Mate 18.04 (Bionic, here) together with the standard ARM installation instructions here.

Turtlebot3 build from source on raspbian buster with RPI 4B+

This instruction covers the installation of ROS Indigo on the original Raspberry Pi with Raspbian.

This is a simple how to for installing and setting up ROS Fuerte on Raspberry Pi.