pi doesn’t turn on with gpio pins
Just finished assembling my v-core 4 and the pi when powered by the board doesn’t stay on.
I tried testing the pins on the octopus and they don’t get readings on none of them.
Anyone has a clue on what I might be doing wrong?
104 Replies
use a multimeter, and check the octopus for 5v on the pinout
I’ve tried, it returns with a 0
check J39 for 5v pls
on the board there is your power in, is it 24v?
Yep
I checked also the j74 pins that are rated on 5v but nothing comes up even there
This cable is the only one that doesn’t return 24v
this is okay, are you sure the 5v jumper is removed? there is a cable over it, cant see it 😄
If you mean the one for the power via usb-c yes
are u able to flash the board local? to make sure the board is okay
can you check both fuse?
I’ll try to flash it, then I’ll check the fuse
Catching up, are you saying the Octopus isn't putting out 5V where it should be?
Yep
Even at the header with nothing connected?
I’ve tried with everything connected, now I’ll try with nothing
perfect. Can narrow down which board is causing the issue
Also, double up your wires. The individual pins can't carry enough current for the pi
What do you mean with double up the pins
Now I was trying to flash again the board and it gives me this error
And it does’t manage to flash again automatically
At that header, there are two 5V pins and two GND pins. Same on the raspi. Use all 4
Separate issue, but you'll want to update ratos then run that flashing again. Issue with truncating the version number that was fixed in the past few weeks
At the moment I don’t have two other jumper wires…
but he checkt with a multimeter, there is no 5v comming from the board
How is your pi powered so that you had that flashing window open?
Usb-c now
ah
Well if 5V isn't coming from the Octopus, thats the problem 😄
I disconnected everything to check if the problem was something with the pi
I don't think there is a way to disable that on the Octopus but it isn't something I've looked into.
if there is no 5v from the octopus pin, there is something wrong in the board
fuse are good?
At this point I'd power the pi through a dedicated power supply and move on (if you have a 5V 3A supply handy)
Checked with ohmeter, they should be good
I meant the fuse
Will it be enough for everything?
yes
I do have it, but this sucks 😔
try it over usb, and get the board running. it may damaged.
Do I have any chance in a warranty claim or you think it’s not worth it?
it was in the kit? so they have to replace it
Yep it was
The strange thing is that none of the pins have voltage, not even the ones near the fans
yes this is rly strange. but im not sure if this is working without a firmware on it
ah it has klipper on it...
Yeah it should have flashed ratos
you're not seeing voltage going to fans that are running?
Can you take a better picture closer to the the octopus board?
I’ll turn on the board and check now
If you don't see voltage on things that are clearly working, then there's something wrong with how you're checking voltage :/
At the momen’t I haven’t even turned on the printer really, so not sure if the fans are working😂
ah, okay
And from the web it tells me this:
I haven’t yet connected thermistor and heater of the hotend
can you flash it again? you can add the mcu to the printer.cfg , are you familiar with it?
I'd follow the configurator, and not mess with the printer.cfg until you're trying custom stuff
So I should flash it again?
yes
May be it has something to do with this error?
the mcu is not costum stuff, if the configurator fails you have no other choice
To flash it I need also to put the jumper for power via usb?
I’m quite familiar with programming but not with klipper
Btw it’s already the third time I’m flashing it
Update ratos and then flash
After a few tries reflashing the board I still get this message… anyone has any clue? Should I open a new thread?
Btw I confirmed that the fans powered by the board do work, and pwm on the tool head board also works
So the flashing should be right
In your pi do
ls /dev/serial/by-id/*
Is there something in return?
What is the default password to ssh?
root User is pi pw is raspberry, maybee ratos has another one
Can’t figure out the password for ratos, any suggestions?
User: pi
Pw: raspberry as @elpoepel said
/dev/serial/by-id/usb-Beacon_Beacon_RevH_937EF6A15154364134202020FF140416-if00
/dev/serial/by-id/usb-Klipper_stm32f446xx_btt-octopus-11-if00
/dev/serial/by-id/usb-Klipper_stm32g0b1xx_btt-ebb42-12-t0-if00
This is what it returns
Try putting this in your printer.cfg
[mcu] serial: /dev/serial/by-id/usb-Klipper_stm32f446xx_btt-octopus-11-if00
It started working for a second
Then I started plugging in motors and fans and it suddently lost connection with mcu
The difference that I noticed is in the presence of one led
unplug that stuff, make sure it is still working.
Then if it is, start plugging stuff in one at a time to see which one is messing it up
If that doesn't narrow it down, make sure to power the pi well. You may need to double up on pwr and gnd pins
I’m powering the pi via usb-c at the moment, for the previous problem 😅
I also tried using another motherboard, same problem
that probably can't supply enough. Fix your power problem otherwise all else is moot
Reinstalled all firmware, also pi
You lost Power to pi or Octopus?
Octopus
wait what?
Do yourself a favor and fix the power to pi before you do anything else
Do not add stuff of the Board is running.
I didn’t lose power completely, it disconnected from pi
Plug it back in the pi, and restart over the interface
Did it but it still doesn’t work, I’ll try to plug it in a different socket
And Power down the Octopus
It was the fucking endstop
The only thing I had always plugged in…
What could it be? Is it shorted or something?
pinout could be wrong
I used everything as given stock
It’s a kit cable, i didn’t even have to crimp it
I think I've heard of them coming wrong, but can't find an example offhand.
Double check the pins even if they are pre-crimped
Wiring endstop wrong can destroy your board
I had one of my end stops wired wrong. Had to switch +_
Grab one of the other endstops that works, check the pinout (with a multimeter if you have to) and make it match
Don't rely on wire color
I think the endstop with White wire are wrong, but cant find it
There is the info @anddelbel
By checking which an ohmeter I found out it is shorted
Or is it normal that it beeps between the two pins without the arrow?
There will be three contacts. A common, a normally open (NO) and a normally closed (NC). Pressing the switch should change the NO and NC continuities to the opposite
If it doesn't change no matter the button press, then it is shorted
Ok, when pressed it’s fine, so i have to switch the cables…
Do I have to cut them or is it possible to get them out?
Thank you very much guys btw
you can get them out but its tricky
Depending on the available equipment, you can try depinning and re-inserting, or cut/swap/solder/heatshrink
White ones or red ones?
oh man, I've never used those but they look nice!
Everything but soldering or replacing the heads
the smallest that fits
Found them cheap on Amazon
I’ll try later this evening or tomorrow and let you know how it went, thanks again
Good luck! And great job troubleshooting it down to the endstop
You dont have to cut any wire or solder it. You can switch the wire on the Connector itself. Or im wrong?
Yeah depinning is the right Option. Overread sorry 🙂
Its just tricky unless you've got a good pin/scalpel kinda thing
Just insert a thin scalpel and bend the plastic locking pin and pull out the cable. Many tries to bend the metal part on the crimp but it's much easier to bend the plastic in the connector
Managed to do it, almost everything works fine now, thanks to everyone!!
woohoo! Happy printing
Good Job, happy printing 🙂