#unable to connect to MCU

63 messages · Page 1 of 1 (latest)

harsh canopy
#

my skr pro 1.2 is unable to connect to my raspberry pi 4. it has worked for 1.5 years now and had to update using a fresh install.

i have tried several thing

-no cables and no jumper and no tmc 2209
-some jumpers
-different sd cards
-different usb cable
-different format size 4kb , 8kb

  • 32 bit version and 64 bit version of ratos
    -older version of ratos

please help

image.png image.png
gentle goblet
#

Did you use the configurator in Rat-OS 2.x?

harsh canopy
#

yes

#

also just tried ratos 1.2.4 still no mcu

gentle goblet
#

Don't use 1.x, it is deprecated now.

When you used the configurator did it flash your skr?

harsh canopy
#

i only could do it manually and it could not detect my skr

#

if checked the file it went to a .FUR

gentle goblet
#

That's the problem, you need to make sure it flashes properly

#

Is the raspberry pi connected to the Internet?

harsh canopy
#

yes

gentle goblet
#

Did you update everything before compiling the firmware?

harsh canopy
#

i just used the 2.0.2

#

do you want me to flash the pi then update and then compile the firmware ?

gentle goblet
harsh canopy
#

still have this

image.png
#

now i downloaded the firmware and put it on an sd card

#

put it in the skr and pressed the reset button and it gave me a green blinking led

gentle goblet
#

You clicked the compile firmware button? Then download the firmware?

harsh canopy
#

yes

gentle goblet
#

And when you come back to this page and click the "check board status" button what does it say?

harsh canopy
gentle goblet
#

@carmine spear not sure if there is anything else to try before having to ssh in?

carmine spear
#

That’s usually the issue

#

There’s nothing gained by SSHing in. It’s not connecting via USB.

harsh canopy
#

already tried 2 different sd cards

spring kettle
#

perhaps the format is incorrect? Does it need to be fat32 or fat16? Sometimes too large sd cards won't work either

harsh canopy
#

i tried fat 32 at 8kb and 4kb on 16 gb sd cards and 128 gb for pi and 32 for skr

spring kettle
#

you shouldnt have to change cluster sizes just fat32. 16GB is too big I think. Try tricking it with a 1GB partition

#

This is just for the flashing oke you dont have to change anything for the rpi

gentle goblet
harsh canopy
#

yes nothing changed

harsh canopy
#

still nothing, could it be that the skr is bricked?

spring kettle
#

are you still trying to flash it to make it visible from ratos?

harsh canopy
spring kettle
#

and stil every time when you put the flash card in, it blinks as if its flashing?

harsh canopy
#

when i put in the skr and press the reset button it flashes a green led for a couple seconds

spring kettle
#

isnt green just reading the card, not necessarily flashing?

#

i had a similar issue with an psfytec or whatever its called

harsh canopy
#

if i take sd card out it turns the .bin file into the .FUR file so i think it works

spring kettle
#

yeh sounds like it

#

Im sorry if I missed parts, i did skim back to the top ... 😉 but did you open a terminal with ssh, sudo to root and used dmesg -T --follow (or something similar) to see what appears when you unplug and plug the skr into the pi?

harsh canopy
#

well i get this now

image.png
#

it's the same with the usb plugged in or not

spring kettle
#

@harsh canopy Sorry was afk for a bit. As far as I am concerned that is either a hardware or cabling issue. Hardware can be either the pi or the skr. I know thats not very helpful but I don't think its the sdcard or the flashing. If you can, I would try another pi, perhaps borrow one

#

Can you connect other things to the pi usb? Try a mouse or external disk see what appears in dmesg

#

whether you get the same errors

harsh canopy
harsh canopy
#

nothing really different happened only the red messages didn't show up

spring kettle
#

well thats a good thing

#

is lsusb output showing the skr?

harsh canopy
#

Now i also pluged in my c270 and old prusa mainboard

image.png
harsh canopy
#

ok i now tried to do the same on my pi4

#

1 usb port seems to be dead all the other seem to work fine

image.png
#

but still nothing with the skr

gentle goblet
#

Was this skr ever working? Maybe it is a bad board

harsh canopy
spring kettle
#

I missed whether you tested the skr and ratos on the pi3

harsh canopy
spring kettle
#

It sounds like the skr has a fried usb port as well then. Can only guess but perhaps the dead port on the pi4 is related to that, maybe accidentally shorted it when plugging/unplugging ...

harsh canopy
carmine spear