I’m excited to announce a significant usability improvement for all moteus controllers, command line tools and the python library! If your moteus controllers are on firmware version 2025-09-20 or newer and your moteus client tools are at 0.3.91 or newer, (and if you are using a pi3hat, it is on firmware 2025-09-20 or newer) there are some big improvements that you transparently get:

1. You no longer need to assign unique CAN IDs before daisy chaining controllers
2. The python transport lets client programs transparently operate across multiple CAN-FD interfaces simultaneously
3. tview will automatically open all controllers attached to all CAN-FD interfaces on the computer

Let’s dig into what this looks like from the command line, tview and what the practical constraints are.

It has been a minute since there has been a pi3hat firmware release, but we have a new one out now, that fixes a longtime usability issue with the pi3hat as well as improves its ability to drive busses with many devices. The release, 2025-09-20 can be found on github with the source and firmware elf. If you’re not running into problems, there is no real need to upgrade, but read on to see if it is something you might be interested in.