![]() The Pi talks to the Octo over USB and "shares" it's Canbus connection, rather than using a dedicated device to do the same thing. Canbus boards can be daisy-chained, and the method in this thread is essentially just replacing a dedicated USB-CAN interface with the one that your PI is already connected to for the printer - the Octopus. Yep, I don't see any reason you couldn't. beep", TURN IT OFF and figure out what you screwed up.Ĭan this method be used for multiple tool boards? Im trying to simplify wiring for an IDEX. That's what happens when you swap ground and 24v, and in case anybody doing some Googling of their own finds this, the BTT Octopus Pro (and normal Octopus, I'm guessing) will beep at you once every 2-3 seconds if it detects a short (or some other problem, probably). Went back to the printer and the enclosure was filled with smoke, lol. Took about 2 minutes until I heard a loud "POP!" in the other room. I Google'd for a bit trying to figure out what the beeps meant, couldn't find anything so I turned it back on while I kept searching. Turned it on, Octo started beeping every few seconds so I shut it off. Hey, at least you got a good story out of it! My problem wasn't colors, it was not correctly rotating things in my head after seeing the documentation displayed the wrong way around. I think its safe to say the moral of the story is never take for granted wire colour even at 3am and test test and test the wires before use. Thankfully replacing the fuse by running out to the car proved that the fuse saved my arse. i thought hmm i wonder if i could still use it but run separate wires for the extruder so i plugged it into my SKR on the printer and it blew the fuse on my SKR. One little puff of smoke and the board TMC driver had a big hole in it. Yup you guessed it the black was the 24V and the Blue was the ground. It was 3am and I never tested the wires before hooking them up. i made the school boy error of assuming the black was ground and the blue was 24v. So off I goes i Cuts the two wires then went to connect them. oh there's a fan right at the top of the printer so i'll cut the wire and take a feed from that and use that. i had a bed slinger printer on the desk beside me and i just needed to find 24v i could tap into. i was having trouble getting it working using a waveshare canhat so someone suggested why dont you set it up outside the printer so i did. The wiring described in the PDF is correct - just make sure what you think you're plugging in is ACTUALLY what you're plugging in. Yep, that cap exploding was completely my bad. How to Use CAN Toolhead Boards Connected Directly to Octopus.pdf How to Use CanBoot to update boards, Tips Connect EBB to Octopus / Pro, power cycle printerįlash Klipper to EBB board with CanBoot CAN command Setup can0 network on Raspberry Pi, power cycle printerįind CAN uuid for Boards a. ![]() Octopus - Setup Klipper for USB to CAN bus bridge, with CAN comms to EBBįind serial device for Octopus / Pro on Raspberry Piįlash Klipper to Octopus / Pro with CanBoot serial command Install CanBoot on Raspberry Pi, flash firmware to boardsĬonfigure and compile CanBoot firmware for Octopus / Pro and EBBįlash CanBoot to boards using STM32CubeProgrammer and computer High Level Instructions, for Understanding WinSCP, to transfer files between Raspberry Pi and computerĭownload for your computer OS and install SSH terminal software, I use PuTTY or Windows CMD Raspberry Pi, or similar, with Klipper / Moonraker / UI installed and working.Best to setup wiring before installing software. RJ11 or RJ12 telephone cable, crimped to connect EBB board to Octopus Power supply for Octopus and EBB toolboard (i.e. But I have not tested this comms feature separately. It uses the same ‘make menuconfig’ setup to configure and compile firmware.ĬanBoot is NOT required to use the Klipper USB to CAN bus bridge comms. This replaces the need for an adapter like a Raspberry Pi CAN HAT, canable adapter, or the Bigtreetech U2C board.ĬanBoot is a custom bootloader loaded onto your Octopus and EBB board that allows users to update Klipper firmware over USB, UART, or CAN comms without physically having to access the board reset buttons or BOOT jumpers. This feature allows the Octopus boards (and other compatible MCUs) to act as a USB to CAN bus adapter. Klipper has a new CAN bus feature, the USB to CAN bus bridge communication for Octopus boards (and other compatible MCUs). ![]() How to Use CAN Toolhead Boards Connected Directly to Octopus / Octopus Pro on CanBoot Wanted to share it with the community and make it easier to find! I found this Canbus with CanBoot and Octopus excellent guide on Facebook, posted by TJ M.
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