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No serial connection between MCU and CB1 #25
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waiting for a solution to this aswell |
I am in contact with BTT, but they have so far not given any solution. I will this week make a warranty claim, because the board is probably toast. |
I ended up reinstalling mainsail and klipper doing a fresh install and it
started working again
…On Fri, Jan 6, 2023 at 1:56 PM jfneptune ***@***.***> wrote:
Did you ever find out what the issue was? Was it the board being toast or
something else?
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How did you reinstall everything? Did you reformat the microsd card and follow the instructions in the BTT manual or install some other way? |
I am also interested in this. I haven't found a solution yet. At this moment, I requested to return the card and will probably get a new one after this and hope it works. They are probably shipping the rev 1.1 right now (SKU changed). |
I'm also seeing this issue. I just got my V1.1 MP8 board with a CM1 but no luck with the serial connections on 2.2.1. I've even tried going down to the 2.1.2 image to see if that makes any difference but no luck. Can anyone else confirm that their MCU LED is not active after flashing the firmware generated by klipper? I only see it blink when I try to load a new MCU firmware or if I reset the chip. Not sure if that is a cause or a symptom of the serial issue. I might try to see if I can follow in @jeronbernal 's footsteps but I'm new to klipper and not quite sure where to begin with doing a fresh install. |
When you compile the firmware for the board, are you choosing USB or serial connection? The M8P & CM1 uses the USB connection option. |
I am compiling with the USB option. |
No i can´t but the CB1 is onboard of the m5p. I have flashed the m5p normally without can jeztztz I see it. Unfortunately I do not know how to flash it correctly for Can. |
Swapped out my RP4B for a CB1/PI4 adapter and I cant see any of my USB services. LSUSB shows just the hubs and nothing else, not the camera or the SKR 1.4. I wanted to play around with the CB1 and put the RP4B in my Voron 2.4, which has a RP3b+ in it now. Anyone figure this out? I am powering the CB1/RP4 board with a 5v meanwell PSU connectioned to the 5v and ground on the GPIO pins. I already copied over all of the klipper config files from the PI so this was a working printer before I swapped it out. |
did you enable usb hub via the commands in the manual?
…On Tue, Feb 21, 2023 at 3:28 PM bddanford ***@***.***> wrote:
Swapped out my RP4B for a CB1/PI4 adapter and I cant see any of my USB
services. LSUSB shows just the hubs and nothing else, not the camera or the
SKR 1.4. I wanted to play around with the CB1 and put the RP4B in my Voron
2.4, which has a RP3b+ in it now.
Anyone figure this out? I am powering the CB1/RP4 board with a 5v meanwell
PSU connectioned to the 5v and ground on the GPIO pins.
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You only do that if you want the USB C port to actually be a USB port and not just a power port. I ended up reseating the CB1 and everything showed up just fine. Must not have been seated correctly. |
I was pulling my hair out over what might be the same issue. My issues disappeared as soon as I disconnected my mini 12864 display. It turns out that Fysetc wires their display connectors reverse of Biqu. I found this reference that talked about rotating the PS1/PS2 connectors. Solved my issue at least. https://docs.vorondesign.com/build/electrical/mini12864_klipper_guide.html |
So, to give a feedback on my side. I had the board replaced by BIQU. They sent me a Manta M8P V1.1 and it works like a charm with the same CB1. I had the issue that was pointed out here. I am not sure what the problem was, but seems like it was a bad board. Maybe if someone is having this same issue, I suggest getting in touch with BIQU. They are willing to help =) |
So much thank you for this. You saved me a lot of time. I was unable to get firmware to the manta and it was because fysetc connected display. |
@Lazybones2319 -- From the manual, page 28:
|
It turns out my issue was a bad sd card. |
Not for me |
Guys... I got my problem solved. For some weird reason, when i pulled the cables of my adxl345 off the board, the serial connection instantly became available. |
I also have a problem with my board. Unfortunately the resistors measure 1.59 volts. Thus same problem as the po. Does anyone know how to fix this problem. I would be comfortable soldering or rerouting some wires. |
You mean the ACT led? I find that if you flash newer CB1 system image, like v2.3.3 either Klipper or Minimal version, the ACT led doesn't lit up/blinking, but if I flash older CB1 system, like the v2.1.2, the ACT led lit up & blinking as usual. Despite that, I still can SSH to my CB1 and open the Klipper UI even if the ACT led doesn't lit up like usual. You can try flash to older CB1 system and see that the LED will lit up again. Note that I do have similar issues with the rest of the guys here where after months of printing, my CB1 suddenly lost its MCU path to my M8P and can't find it by serial/by-id/. |
Hello all, I am also writing it here, together with Reddit.
I just received my Manta M8P and CB1, but am experiencing a bit of an issue here.
What I can not have working is the serial connection between both MCU and CB1. It looks like an issue with the USB somewhere in the chain. The USB chip is not overheating or anything, but when I connect a flash drive to any USB port, it isn't recognized.
![I cannot find any connected USB devices, even when I connect something. Also, no serial connections established.](https://user-images.githubusercontent.com/57493358/207350399-bf323a73-c27f-4e17-9d0b-4300be71ec1d.png)
Does anyone have a clue what could be happening? I fear that I might have a deffective usb hub chip somehow, which would be pretty bad.
Any help is appreciated =)
TIA
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