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Rat Rig Community [Unofficial]•3y ago

Cannot Connect Octopus Pro to Pi

Hi guys, I'm very new to this community and admittedly a little over my head when it comes to this kind of custom 3D printer and I bought it looking to expand my experience and knowledge. I have been stuck trying to connect the Octopus pro to my Raspberry Pi. I keep getting the error mcu 'mcu' : unable to connect. I have tried searching online and through this discord but what works for others doesn't seem to be working for me. I could really use any help I can get. Thanks in advance!

51 Replies

blacksmithforlife•3y ago

did you work through https://discord.com/channels/582187371529764864/1046952693480038500 ?

graceful-beigeOP•3y ago

Yes, although I do not know how to SSH into my raspberry pi but I have gone through all the other points

blacksmithforlife•3y ago

What operating system is the computer you are using to connect to the mainsail interface (ratos.local)?

graceful-beigeOP•3y ago

Windows 11

blacksmithforlife•3y ago

ok, so open up powershell and type in ssh pi@<IP ADDRESS> where <IP ADDRESS> is the ip address of your raspberry pi

blacksmithforlife•3y ago

It should look something like this

No description

graceful-beigeOP•3y ago

sorry if this is a dumb question but how do I get the ip address from the Pi?

blacksmithforlife•3y ago

nope, not a dumb question. Since you have the web UI working you can grab it form the machine tab

No description

graceful-beigeOP•3y ago

okay i connected but its now asking for password

blacksmithforlife•3y ago

default password is raspberry unless you have changed it when typing the password it will not show anything. When you are done, just hit enter

graceful-beigeOP•3y ago

im in now do i run the dmesg -w?

blacksmithforlife•3y ago

ok, so now you can continue with the FAQ

graceful-beigeOP•3y ago

gotcha

blacksmithforlife•3y ago

I would first run lsusb and see if it is connected so I see

pi@ratos:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 1d50:614e OpenMoko, Inc.
Bus 001 Device 003: ID 046d:082c Logitech, Inc. HD Webcam C615
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

pi@ratos:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 1d50:614e OpenMoko, Inc.
Bus 001 Device 003: ID 046d:082c Logitech, Inc. HD Webcam C615
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

that OpenMoko is my octopus board

graceful-beigeOP•3y ago

No description

graceful-beigeOP•3y ago

This is all that shows for me, no OpenMoko

blacksmithforlife•3y ago

ok, so yeah now you need to unplug the octopus, run dmseg -w and while it is running plug your octopus back in

graceful-beigeOP•3y ago

and i did remove the jumper that changed the type c port from power in to data gotcha So it immediately spit out a bunch of information but then did nothing as I plugged in the board

blacksmithforlife•3y ago

so sounds like the octopus isn't even trying to communicate with the PI. Just to double check, you were able to flash the octopus correctly?

graceful-beigeOP•3y ago

Yes, once i put it back into the PC it changed from the .bin to .cur

blacksmithforlife•3y ago

and you are sure you selected the correct firmware? We have had users select the wrong one before

graceful-beigeOP•3y ago

Let me double check looks to be the right one as far as I can tell, would it be safe to re run the compile firmware command and download it again?

blacksmithforlife•3y ago

I believe so. How long did you wait while the board was being flashed?

graceful-beigeOP•3y ago

I didn't see any indicator of it being finished so left it for 5 minutes or so was that enough time?

blacksmithforlife•3y ago

maybe? I was overly cautious and waited 10 minutes

graceful-beigeOP•3y ago

fair enough, I'll try to flash it again and let it sit longer this time I really appreciate the help by the way, thank you! So I'm no longer getting the mcu error but it just says Printer is not ready The klippy host software is attempting to connect. Please retry in a few moments.

blacksmithforlife•3y ago

ok, did you change your printer.cfg file to match your setup?

graceful-beigeOP•3y ago

Yes but I'll double check it now Yep, it's configured properly

blacksmithforlife•3y ago

dumb question, you did plug the octopus board back into the pi right?

graceful-beigeOP•3y ago

yes i did lol

blacksmithforlife•3y ago

I would try dmesg -w again and see if it is trying to connect

graceful-beigeOP•3y ago

okay Same result as last time sadly Although I did get some undervoltage warnings for some reason

blacksmithforlife•3y ago

that's not good. How do you have everything powered?

graceful-beigeOP•3y ago

I have it wired directly to the 24V PSU

blacksmithforlife•3y ago

how do you have the pi powered?

graceful-beigeOP•3y ago

using a seperate USB power supply

blacksmithforlife•3y ago

can that supply enough amps?

graceful-beigeOP•3y ago

Its 5v 2.4A, that should be enough for the Pi 3 right?

blacksmithforlife•3y ago

it should be, but if it is throwing low power errors then for some reason your setup is not delivering enough power

graceful-beigeOP•3y ago

fair enough, I'll see if I can find something more powerful just swapped it for a 3 amp charger It's still giving me undervoltage warnings

blacksmithforlife•3y ago

did you change the USB cord from the charger to the pi?

graceful-beigeOP•3y ago

Yes but I'll try another one

blacksmithforlife•3y ago

you could try powering it via the header pins (that is what I do). I use two 5v pins and 2 ground pins and have those connected to a dedicated psu (though you can use pins from octopus. I believe it even has a raspberry pi header port that is meant for powering it)

graceful-beigeOP•3y ago

Nice, would that effect the issue with connecting to the controller?

blacksmithforlife•3y ago

maybe? since it is having under voltage issues the PI will turn things off to conserve power and it will just generally cause issues.

graceful-beigeOP•3y ago

Okay, then I'll work on fixing that first So I forgot I had a Pi 4 and official PSU lying around and that doesn't seem to have the same voltage issues I re ran the dmesg -w again and tried plugging the board in to no avail also I replaced the jumper to make the type C port the power in again and once connecting it to power I noticed that a green LED is now lit instead of a red one that was lit while it was wired directly But i can't seem to find a manual or guide that explains what any of these LEDs mean What are the chances that the octopus is just dead? because nothing I'm doing seems to be working at all and I can't get any message to show up from dmesg -w

blacksmithforlife•3y ago

While a long shot I would test dmesg -w with another USB device on the pi. Just to rule out that it's the cord or the port on the pi

graceful-beigeOP•3y ago

just tried it, it showed up immediately there's a store near me that has an octopus V1.1 board in stock. I'm going to pick that up tonight and try it out tomorrow

optimistic-gold•3y ago

Hi, did you fix it? a friend of mine has the same issue. MCU printer not connected. seems to have a similar issue

blacksmithforlife•3y ago

https://discord.com/channels/582187371529764864/1046952693480038500 if they are still having issues, start a new post please

EternalPath•3y ago

Try manually compiling the firmware instead of using the auto compiled firmware. There is a bug in the auto compile somewhere. Manual compile generated a different file size firmware file for me and that solved this issue.

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