Connecting to an Ender 7

[Fatso]

Hi everyone,
I'm hoping someone can help me.
I have searched the forum and can't see any similar questions
I've installed Octopi on a Pi4 and can connect to it with no problems.
I can't get Octopi to connect to my Ender 7.
I gone through all the dialogs and changed the serial port from/to "/dev/ttyUSB0" and "/tmp/printer" rebooting.
I'm getting the error "option 'serial' in section 'mcu' must be specified". I can't see that option anywhere.
Anyone help please?

Cheers
Fatso.

[Ewald_Ikemann]

Hello @Fatso !

@Fatso

Anyone help please?

As good as we can, but for help, please use the sub-forum Get Help. (I'll move it for you).

But please in this template:

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What is the problem?

WRITE HERE

What did you already try to solve it?

WRITE HERE

Have you tried running in safe mode?

WRITE HERE

Did running in safe mode solve the problem?

WRITE HERE

Systeminfo Bundle

You can download this in OctoPrint's System Information dialog ... no bundle, no support! )

WRITE HERE

Additional information about your setup

OctoPrint version, OctoPi version, printer, firmware, browser, operating system, .... as much data as possible

WRITE HERE

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For it is a Crealty printer try with/with out the SD card in the printer and also this:

Put tape on the 5V pin - Why and how

First of all this whole tutorial isn't a mandatory mod - you just need it if you run into issues (weird things are happening and you've already ruled out the more common suspects) or if the always running fan and illuminated display (even when the printer is turned off) disturbes you. I'm starting with the why part: If you connect a 3D printer via USB to your Raspberry Pi it can lead to all sorts of power related issues. Most of the time those issues occur only if you turn on your pi before …

[Fatso]

What is the problem?
I've installed Octoprint on a Pi4 and can connect to it with no problems.
I can't get Octopprint to connect to me Ender 7.
I'm getting the error "option 'serial' in section 'mcu' must be specified". I can't see that option anywhere.
From the Terminal-
Changing monitoring state from "Offline" to "Opening serial connection"
Connecting to port /tmp/printer, baudrate 250000
Changing monitoring state from "Opening serial connection" to "Connecting"
Connected to: Serial<id=0xac3be750, open=True>(port='/tmp/printer', baudrate=250000, bytesize=8, parity='N', stopbits=1, timeout=10.0, xonxoff=False, rtscts=False, dsrdtr=False), starting monitor
Send: N0 M110 N0125
Recv: ok
Send: N0 M110 N0125
Changing monitoring state from "Connecting" to "Operational"
Recv: ok
Send: N0 M110 N0125
Recv: ok
Send: N1 M11539
Recv: ok FIRMWARE_VERSION:4c8d24a FIRMWARE_NAME:Klipper
Send: M21
Recv: ok
Send: M105
Recv: ok T:0
Send: M105

What did you already try to solve it?
I've gone through all the dialogs and changed the serial port from/to "/dev/ttyUSB0" and "/tmp/printer" rebooting.

Have you tried running in safe mode?
Yes

Did running in safe mode solve the problem?
No - No difference

Systeminfo Bundle
You can download this in OctoPrint's System Information dialog ... no bundle, no support! )

octoprint-systeminfo-20220218204908.zip (1.6 MB)

Additional information about your setup
OctoPrint 1.7.3, OctoPi 0.18.0, Creality Ender 7 Firmware 1.0.20T

[Charlie_Powell]

When you were trying to install OctoPrint on your SD card you selected the wrong image in the Raspberry Pi imager.

Just install the regular 'OctoPi' image, not 'OctoPi-Klipper' which will only work if you have installed Klipper fimware on your printer.

[Fatso]

Thank you I'm on the case.
When I went into the Pi Imager I could see that the version with Klipper was already downloaded.
I'll confirm.

[Fatso]

Hi Charlie, That's all sorted.
Thanks for your help.
Cheers
Fatso!

[lugiber]

Love your alias. Just so you know.
The Ender 7 is a wonderful printer. I hope you enjoy it!