MCU not connecting
Does it work with the rpi4?
I've removed the power jumper on my octopus 1.1, installed the firmware which returned the .cur file.
Is it an issue with the cable that came with the octopus maybe?
I unplugged everything from the board except for the power cables and steppers.
I remembering having this issue as well on the vcore 300 (This is a 400) and I ended up wiring the RPI to the board using the rx/tx wires.
I would like to get the USB running now.
15 Replies
it works fine with rpi4 (that is what I am using)
have you worked through https://discord.com/channels/582187371529764864/1046952693480038500 ? it deals with a bunch of the common issues
evident-indigo•17mo ago
Yes I worked through those except for removing all stepper wires and the power wires at the bottom
When I run the dmesg -w command and I plug and unplug the board, nothing changes
I have seen issues where the firmware that was flashed was wrong, or even though it changed to .CUR it didn't really complete and needed to be flashed again
have you also tried different USB cords and different ports on the PI?
evident-indigo•17mo ago
I have flashed 2 times already, I can try it again tomorrow. I tried different ports but not another cable yet. I would think the one supplied with the octopus board should be good? Or is it a power only cable?
Not sure, but there are USB cables that are power only
you can also try plugging in something else to the USB ports and make sure it is showing up in
dmseg -wevident-indigo•17mo ago
Yes that works
It is probably a power cable supplied with the Octopus board. I'll report back tomorrow
Hmm nevermind it's not that, when I connect my phone to the octopus cable the pi recognises it as the pixel6
The jumper that needs to be pulled out is the one in the middle of the board marked with power right>?
you need to remove all the jumpers unless it has a green box over it in the wiring diagram
https://os.ratrig.com/docs/boards/btt/octopus-11#wiring
so only those 11 green boxes should have jumpers
everything else needs them removed
evident-indigo•17mo ago
I did that, but the part cooling fan port has the jumper different and only the blue pwm wire as in the guide for the 4028 fan
Endstops are also wired correctly
I don't have a controller fan either, should I remove the jumper above that port?
while you are troubleshooting this I would disconnect everything except for power to octopus and USB to PI. That way you aren't also potentially dealing with shorts or other electrical weirdness
evident-indigo•17mo ago
evident-indigo•17mo ago
I disconnected everything except for the power on the board (other cables are disconnected on the other end)
Still nothing being detected on the usb ports of the pi
I also tried a rpi 3b but same result
Also reflashed the board and I have the .cur file on my sd card
I'll do a reflash of the rpi ratos as well
to compile the firmware for the board again
Fixed it, after compiling the firmware.bin through ssh I got a .bin file that was half of the one that I generated through my first RatOS install.
The new .bin was around 25kb en the older one around 40kb
Now it's connecting!
@miklschmidt take look above, that doesn't make sense to me
Me neither 🤨
literally the same process (same script)..
I have never been able to reproduce this either. First compile has always worked for me, and i've done this hundreds of times.
@blacksmithforlife @miklschmidt I just experienced the exact same problem. Solved the same way as @asicresistor .
Also noted the difference in file size between the auto compiled firmware file and the manually compiled firmware file.
it's 2 am now 
I believe 2.0 will fix this