I was searching for a precompiled image of Ubuntu and ROS Kinetic for RPi4 and came across this (as it was a pain in the ass to compile ROS from source on rasbperry).
I’ve just booted the RPI4 with the image and successfully connected it to our wifi. However, I tried disable the Wifi and connected it with a ethernet cable, but that didn’t work.
Another thing that might not corresponds to the actual image, but I wasn’t able to contact the ROS master running on my PC in the same network. However, I was able to ping the PC from the RPi4.
The following config was used:
PC - ROS MASTER
I’ve also added each IP in each corresponding /etc/hosts file.
However, the opposite setup works, by letting the RPi4 acting as the master and the PC the slave.
Then Im able to see the rostopic list from the PC.