PI disconnected mid print out of nowhere and now the entire host ''died'' and is unresposive

General Discussion
1

Printer Model: e3s1 and a custom one
MCU / Printerboard: stm32f401 for the ender 3s1 and a e3v2 4.2.2 board
Host / SBC bigtreetech Pi
klippy.log

Describe your issue:

…i already had multiple issues with this btt pi that i got less then 2 weeks ago, couldn’t get a flash working with the latest image 2.3.4, tried with the 2.3.3, and it worked, had some issues setting up my 3 klipper instances, but, in the end managed to connected and set up everything, completely, yesterday, and all 3 worked fine, they finished multiple jobs even some went printing overnight and finished some jobs today, then, i went to print more stuff (first prints of the day, no changes do config, nothing) and around 10/15 minutes into them (only had 2 of my 3 printers printing at the time) they both stopped mid print, the btt lost connection and from that point i didn’t manage to re-connect the btt (turn it on and off, changed power supply, took out sd, check system wifi config, turned wifi on and off, got it closer to my router, checker wifi antenna cable, nothing works, ssh via putty returns ‘‘host does not exist’’ ou ‘‘fatal error conection timeout something’’

had to spent the last 50 minutes getting a program to access my klippy log files due to windows not reading them ‘‘normally’’, didn’t understand much of them myself, but ill send logs from both active klipper instances at that time
klippy1.log.2024.07.11.zip (4.7 MB)

had turn the logs into zip due to the large size.

if any other info is needed, feel free to ask, any help or tips are welcome, i ran out of ideas, been having non-stop issues for over 2 weeks now, first it was a sonic pad that was working right, got rid of it, bought some btt pi board, then it was almost a week of trying to get a image to work, with no success, some othe config issues and now this :confused:

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btw, i uploaded two klippy.log files, the klippy 1 is from my ender 3 s1 with the f401 board and the klippy 2 is from my custom with a 4.2.2 gd32f303

3

Can you connect it with an ethernet cable to run some tests?
I know it will be a pain in the ass but you might able to get the syslog and the output from dmesg which could could give some insight into what happened.

4

tried, doesn’t work/host does not exist, re-did the flash 2 times already, even got another sd card from another btt pi that is working fine, plugged on this one, nothing, still no connection, took the sd out, plugged on it’s original pi, 5 seconds, connected fine, so the sd isn’t an issue
i ran out of explanations, the only thing left is that a brand new, used for less then 4 day btt pi just straight up died, already opened a ticket with btt on aliexpress as well, but they as incredibly slow to answer

5

How are you wiring the BTT Pi to the main controller board?

A drawing and pictures would be helpful.

6

via the regular usb ports, not sure on how to draw that, its just the cable plugged in the usb port on the printer

7

spent 4 hours with a friend yesterday trying to solve this, nothing, tried multiple cards, images, configs, different wifis, sd card readers, even different laptops to write the image, nothing, had 3 other pi’s with us, tested everything on them as well, all worked, except for mine, already opened a refund request with the btt store, if i can’t solve this issue until they answer me, ill send it back, can’t think of any other explanation besides hardware issues

8

You didn’t answer my question.

When I asked how you wired things, I’m want to know how you wired the BTT Pi’s power supply relative to the two main controller boards.

There are some things that I’m looking for (common ground being a big one) that I want to understand but not guide you.

9

ah, got it, well, the btt was on the 5v option (with the jumper) using a regular 5v power brick (tested 4 different ones already and different cables also) it wasn’t connected to the printer’s powers supply.
and, not sure it it means anything, when i first started to configure this btt, i began trying to use it with the 5v option, was having a bunch of issues, took the jumper out, plugged it into a 24v powersupply, managed to connect it, unplugged it, got it back to the 5v and it ‘‘worked’’ untill i had some other issues, it almost like i had to ‘‘shock’’ the board to get the 5v to work, or something else, dunno

10

Again, please provide a diagram and images of the wiring.

It’s literally impossible to understand what’s going on from this description:

From what you’re describing, it’s highly likely that you applied too high a voltage to the BTT Pi, but I can’t be sure.

I’m asking for the wiring diagram so that any problems can be identified and corrected in the diagram so that when you try again, you won’t kill any electronics.

11

From what you’ve said it sure seems dead. Maybe it had a faulty voltage regulation circuit out of the box. I was running one on a noisy fluctuatiing supply and it didn’t miss a beat besides a rare boot failure every now and then. When I switched to a better PSU it’s been fine ever since…It could have been under volted at some stage, who knows.

Don’t fall for the Ali express partial refund scam, sometimes they string you along for ages and make you jump through all sorts of hoops and eventually end up making a partial refund offer and if you accept that you’re screwed. I’ve had a few items I’ve had to charge back through my bank to get a full refund.

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