Fill out above information andin all cases attach yourklippy.logfile (use zip to compress it, if too big). Pasting yourprinter.cfgis not needed Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there
Hello everyone, I have this problem.
I used to connect the Raspberry Pi to the printer via USB, but then I decided to connect it through the TFT port USART1.
I followed the Klipper instructions and have tried several times, but at the moment I can’t get the Raspberry Pi to connect to the SKR3.
Can anyone help me?"
I’ll give you some answers to your questions:
1 The board is a BTT SKR3 with the SMT32H743 chip.
2 I’m not sure, maybe it’s because it lacks WiFi? I solved it with an external USB antenna.
3 I got the information from this website that was suggested to me SKR-3/Firmware/Klipper/README.md at master · bigtreetech/SKR-3 · GitHub
4
I built a box for the printer to hold both the SKR3 and the Pi1, but the USB cable went around the outside, and if I accidentally bumped it, the Raspberry Pi would turn off. I hope I’ve been clearer so that you can help me in some way.
Please answer all questions as completely as possible - providing more information and anything that you think might be helpful is never a problem. There is nothing that you can do that we haven’t seen before and we won’t embarrass you over bad wiring or whatever.
Things will go smoother and faster if you don’t turn this into an episode of “House”.
Okay,. I’ve found the information on it.
Actually it’s because Raspberry Pi’s that are earlier than the 3 do not have sufficient computing power to handle Klipper.
Can you confirm that you actually have a Raspbery Pi 1 - a picture of it would be nice. A picture including the Serial connection to the SKR 3 would be even better.
This could be the cause of your problems - when I looked through your klippy.log, there are a lot of mcu 'mcu': Timeout on connect errors.
This is three years old. Did you follow the instructions explicitly and what deviations did you make? It look like youi’ve built new Klipper firmware for your board using the Raspberry Pi - this is a good thing.
Did you run ls /dev/serial/by-id to get your serial = /dev/ttyAMA0 connection?
Which pins on the Raspberry Pi are you connecting to?
Not what I was asking for. I wanted to see the cable and how it connects to the SKR 3 and the Raspberry Pi.
Serial connections are a lot harder to set up and get working reliably than USB ones; I can say that with experience.
Please answer the questions above and let’s see what we can do about getting you up and running.
I seriously suggest that you consider getting a Raspberrly Pi 4B+ as your host. The rPi 1 that you’re using may be the reason that you’re having the problems but you’ll find that things work better and run faster with the newer rPi.
I’ve seen people have this issue before a number of times and their solution to the issue, like you, is to go to a serial connection and the question that I always have to ask is: why don’t you design and print a bigger box that gives better protection to the USB cable? As I said, USB connections are a lot simpler with no need to make your own cables.
You should also take a look at Thingiverse.com and see if somebody has had the same issue and have designed an enclosure that you can print and use.
That’s really helpful - that’s what I’m looking for.
Now, it looks like you’re powering the Raspberry Pi 2 from the BTT SKR 3 board. Is that correct?
If it is, could you disconnect the 5V line to the rPi and power it from a Raspberry Pi power supply? Leave the other three lines (GND, RX & TX) in place.
I am wondering about the draw the Raspberry Pi 2 (and WiFi adapter) has on the SKR 3 5V power supply. If it’s too great, then it may cause the MCU on SKR 3 to brown out, leading to the problems that you’re having.
