Questions about vars.cfg

[Mrmomomomi]

[ningpj]

by default, Happy Hare saves calibration and run state information in a persistent file called mmu/mmu_vars.cfg. The location and name of this file is defined in mmu/base/mmu_macro_vars.cfg under the [save_variables] block and needs to be writable by the pi user kipper is installed to run as. If you are getting this error, the klipper user likely doesn't have permissions to write to <klipper pi user home>/printer_data/config/mmu OR you have a full or faulty SD card.

[Mrmomomomi]

默认情况下，Happy Hare 将校准和运行状态信息保存在名为 的持久文件中。此文件的位置和名称在块下定义，需要由安装 pi 用户 kipper 的 pi 写入才能运行。如果您收到此错误，则 klipper 用户可能没有写入权限，或者您的 SD 卡已满或有故障。mmu/mmu_vars.cfg``mmu/base/mmu_macro_vars.cfg``[save_variables]``<klipper pi user home>/printer_data/config/mmu

I'm using the Raspberry Pi CM4 EMMC version.,Actually, I don't know much.,Can the great god give me a list of step-by-step solutions.

[ningpj]

I'll see if Ican help.

ssh to the Pi CM4 using the account you normally use.
send the output from the following commands to confirm the home directory for the user, folders and folder / file permissions.

uname -a; id; pwd; ls -al

It will return something like the following:

Linux vorondev 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST 2023 aarch64 GNU/Linux
uid=1000(pi) gid=1000(pi) groups=1000(pi),4(adm),5(tty),20(dialout),24(cdrom),27(sudo),29(audio),44(video),46(plugdev),60(games),100(users),104(input),106(render),108(netdev),997(gpio),998(i2c),999(spi)
/home/pi
total 164
drwxr-xr-x 21 pi   pi    4096 May  7 18:09 .
drwxr-xr-x  3 root root  4096 Feb 21  2023 ..
drwxr-xr-x  9 pi   pi    4096 Dec 12  2021 arducam
-rw-------  1 pi   pi   45305 May  7 18:09 .bash_history
-rw-r--r--  1 pi   pi     220 Feb 21  2023 .bash_logout
-rw-r--r--  1 pi   pi    3523 Feb 21  2023 .bashrc
drwxr-xr-x  8 pi   pi    4096 Apr  3  2023 BOSSA
drwxr-xr-x  8 pi   pi    4096 Jun  3  2023 .cache
drwx------  5 pi   pi    4096 Jun  3  2023 .config
drwxr-xr-x 10 pi   pi    4096 Apr  3  2023 crowsnest
drwxr-xr-x  5 pi   pi    4096 May  4 18:52 fluidd
-rw-r--r--  1 pi   pi      55 Apr  3  2023 .gitconfig
drwxr-xr-x  8 pi   pi    4096 May  4 18:53 Happy-Hare
...

Also from the mainsail or fluidd user interface, please open mmu/base/mmu_macro_vars.cfg and attach what you have for the [save_variables] block.

[Mrmomomomi]

uname -a; id; pwd; ls -al

Please ignore the username, I changed it myself

Linux voron-300 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/Linux
uid=1000(biqu) gid=1000(biqu) groups=1000(biqu),4(adm),5(tty),20(dialout),24(cdrom),27(sudo),29(audio),44(video),46(plugdev),60(games),100(users),104(input),106(render),108(netdev),997(gpio),998(i2c),999(spi)
/home/biqu
total 108
drwxr-xr-x 20 biqu biqu 4096 May 7 14:21 .
drwxr-xr-x 3 root root 4096 Jun 18 2023 ..
-rw------- 1 biqu biqu 522 May 6 21:50 .bash_history
-rw-r--r-- 1 biqu biqu 220 May 3 2023 .bash_logout
-rw-r--r-- 1 biqu biqu 3523 May 3 2023 .bashrc
drwxr-xr-x 3 biqu biqu 4096 Jan 21 03:13 .cache
drwxr-xr-x 10 biqu biqu 4096 May 6 20:29 crowsnest
drwxr-xr-x 8 biqu biqu 4096 May 6 20:56 Happy-Hare
drwxr-xr-x 7 biqu biqu 4096 May 6 20:20 kiauh
drwxr-xr-x 3 biqu biqu 4096 May 6 20:22 kiauh-backups
-rw-r--r-- 1 biqu biqu 561 May 6 21:27 .kiauh.ini
drwxr-xr-x 11 biqu biqu 4096 May 6 20:28 klipper
drwxr-xr-x 9 biqu biqu 4096 May 6 21:28 klipper-led_effect
drwxr-xr-x 9 biqu biqu 4096 May 6 20:22 KlipperScreen
drwxr-xr-x 6 biqu biqu 4096 May 6 20:25 .KlipperScreen-env
drwxr-xr-x 5 biqu biqu 4096 Jan 21 03:12 klippy-env
drwxr-xr-x 3 biqu biqu 4096 Jan 21 03:11 .local
drwxr-xr-x 5 biqu biqu 4096 May 6 20:30 mainsail
drwxr-xr-x 3 biqu biqu 4096 Jan 21 03:16 mainsail-config
drwxr-xr-x 8 biqu biqu 4096 May 6 20:29 moonraker
drwxr-xr-x 4 biqu biqu 4096 Jan 21 03:13 moonraker-env
drwxr-xr-x 8 biqu biqu 4096 Jan 21 03:16 moonraker-timelapse
drwxr-xr-x 11 biqu biqu 4096 May 6 20:29 printer_data
-rw-r--r-- 1 biqu biqu 807 May 3 2023 .profile
drwxr-xr-x 8 biqu biqu 4096 Jan 21 03:24 sonar
-rw-r--r-- 1 biqu biqu 165 May 6 20:30 .wget-hsts
-rw------- 1 biqu biqu 55 May 7 14:21 .Xauthority

[Mrmomomomi]

I'll see if Ican help.

ssh to the Pi CM4 using the account you normally use. send the output from the following commands to confirm the home directory for the user, folders and folder / file permissions.

uname -a; id; pwd; ls -al

It will return something like the following:

Linux vorondev 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST 2023 aarch64 GNU/Linux
uid=1000(pi) gid=1000(pi) groups=1000(pi),4(adm),5(tty),20(dialout),24(cdrom),27(sudo),29(audio),44(video),46(plugdev),60(games),100(users),104(input),106(render),108(netdev),997(gpio),998(i2c),999(spi)
/home/pi
total 164
drwxr-xr-x 21 pi   pi    4096 May  7 18:09 .
drwxr-xr-x  3 root root  4096 Feb 21  2023 ..
drwxr-xr-x  9 pi   pi    4096 Dec 12  2021 arducam
-rw-------  1 pi   pi   45305 May  7 18:09 .bash_history
-rw-r--r--  1 pi   pi     220 Feb 21  2023 .bash_logout
-rw-r--r--  1 pi   pi    3523 Feb 21  2023 .bashrc
drwxr-xr-x  8 pi   pi    4096 Apr  3  2023 BOSSA
drwxr-xr-x  8 pi   pi    4096 Jun  3  2023 .cache
drwx------  5 pi   pi    4096 Jun  3  2023 .config
drwxr-xr-x 10 pi   pi    4096 Apr  3  2023 crowsnest
drwxr-xr-x  5 pi   pi    4096 May  4 18:52 fluidd
-rw-r--r--  1 pi   pi      55 Apr  3  2023 .gitconfig
drwxr-xr-x  8 pi   pi    4096 May  4 18:53 Happy-Hare
...

Also from the mainsail or fluidd user interface, please open mmu/base/mmu_macro_vars.cfg and attach what you have for the [save_variables] block.

[ningpj]

Ok so its a BTT CM4 module running their Debian based linux image.
Can you please run

ls -al printer_data/config/mmu/mmu_vars.cfg

and

cat printer_data/config/mmu/mmu_vars.cfg

Unfortunately I need to go out for a while but will check back later.

[Mrmomomomi]

Ok so its a BTT CM4 module running their Debian based linux image. Can you please run

ls -al printer_data/config/mmu/mmu_vars.cfg

and

cat printer_data/config/mmu/mmu_vars.cfg

Ok so its a BTT CM4 module running their Debian based linux image. Can you please run

ls -al printer_data/config/mmu/mmu_vars.cfg

and

cat printer_data/config/mmu/mmu_vars.cfg

My motherboard is BTT M8P core board is Raspberry Pi CM4 The username is my custom, the machine is printing, I'll try it later

[Mrmomomomi]

Ok so its a BTT CM4 module running their Debian based linux image. Can you please run

ls -al printer_data/config/mmu/mmu_vars.cfg

and

cat printer_data/config/mmu/mmu_vars.cfg

Unfortunately I need to go out for a while but will check back later.

Ok so its a BTT CM4 module running their Debian based linux image. Can you please run

ls -al printer_data/config/mmu/mmu_vars.cfg

and

cat printer_data/config/mmu/mmu_vars.cfg

Unfortunately I need to go out for a while but will check back later.

Hello, friend of which country are yours?

[Mrmomomomi]

Ok so its a BTT CM4 module running their Debian based linux image. Can you please run

ls -al printer_data/config/mmu/mmu_vars.cfg

and

cat printer_data/config/mmu/mmu_vars.cfg

Unfortunately I need to go out for a while but will check back later.

After executing the command you sent, the same error is still reported

[ningpj]

Can you copy the output from the commands above. Still trying to verify your setup and permissions. In all likelihood, rerunning Happy Hare ./install.sh without arguments “may” fix this but need to confirm it you have an underlying permission issue.

[Mrmomomomi]

[ningpj]

Can you please run the following commands and upload the results:

ls -al printer_data/config/mmu/mmu_vars.cfg

and

cat printer_data/config/mmu/mmu_vars.cfg

[Mrmomomomi]

[ningpj]

Everything looks fine. Have you run through the calibration steps outlined in the Happy Hare documentation to calibrate your selector, servo, gear stepper and encoder?

https://github.com/moggieuk/Happy-Hare/blob/main/doc/calibration.md

[Mrmomomomi]

Boss, I'll contact you tomorrow, the machine is still working, I'll try again in the afternoon if the rabbit still has an error

[ningpj]

It needs to be calibrated and will need to run though the steps in the link above.

[Mrmomomomi]

At the beginning, I installed and started debugging, and I knew that I started to tune the encoder, and the encoder was broken, and then I purchased parts and waited for the goods. After the arrival and loading, it was reported that the error was reported, and the machine could not run if there was an error, so I commented out the relevant files first and let the machine work

[Mrmomomomi]

It's still the same error

[ningpj]

check your klippy.log for errors during startup for the mmu_vars.cfg file from mainsail/fluidd. the file exists and it looks like it has the correct permissions to be opened and written by the biqu user.

Also make sure you are loading all the Happy Hare config in printer.cfg. You should have [include mmu/base/*.cfg] as the first include for Happy Hare.

[moggieuk]

Looks like @ningpj has given you all the correct advice but it appears you didn't say "add the Happy Hare includes" when you ran the ./install.sh -i installer. If you didn't do this you must add them manually. Honestly it is best to let the installer do it for you.

Edit: Also the error message was confusing because it talked about mmu_software when it should have said mmu_macro_vars. This typo in error has now been fixed.