This firmware has a highspeed serial connection, please change the Baudrate to AUTO or 250000 bps in host software such as Octoprint, Pronterface, etc. This firmware is incompatible with the plugin Meatpack and it is unnecessary due to the higher communication speed.

For BTT SKR boards the default baud is 115200.

Before you can view the print screen in Octoprint prints, you must configure the Octoprint G-code scripts. Octoprint users can install: https://plugins.octoprint.org/plugins/m73progress/ for update the progress bar and Print time when print from host or if you slice with Cura, you can use the Cura plugin Display Progress on LCD and select M73 as the time reporting method:

The status line shows the last message received through the Marlin core or by the M117 command. It is recommended to install a plugin in your slicer or Octoprint (Detailed Progress, DisplayLayerProgress) to embed M117 commands to see, for example, the layer and Z height.

Raspberry Pi and many other hosts (PC) energize the USB port through the +V pin, it can be dangerous for your host or for the printer connect a USB cable directly, also, that could cause interferences, produce some glitches in the screen and communication, see here https://community.octoprint.org/t/put-tape-on-the-5v-pin-why-and-how/13574. It is important that you disable the +V pins as indicated in the next picture.

For propper use of this firmware and Octoprint, use these G-code scripts to configure your Octoprint installation.

Before print job starts

M75 {{ event.name }}

After print job completes

M77 ; End print screen
;disable motors
M84
;disable all heaters
{% snippet 'disable_hotends' %}
{% snippet 'disable_bed' %}
;disable fan
M106 S0

After print job is cancelled

M77 ; Stop print timer
M117 Cancelling
G27 ; Goto park position
M84 ; disable motors

;disable all heaters
{% snippet 'disable_hotends' %}
{% snippet 'disable_bed' %}

M106 S0 ; disable fan
M117 Print was cancelled

After print job is paused

M76 ; Pause print screen
M117 Print was paused

Before print job is resumed

M75 {{ event.name }}
M117 Print was resumed

After connection to printer is established

M117 Octoprint is connected

Before connection to printer is closed

M117 Octoprint was disconnected

For proper indicate to printer that a job was cancelled from the Octoprint console the G-code M524 must be sent instead of M25 (Pause). Go to Octoprint Settings / Printer / Serial Connection / Firmware & protocol and scroll down to Protocol fine tuning. Then change SD Cancel Command to M524

Also add the M524 to Emergency commands and long running commands.

Octoprint can sometimes send an emergency stop (kill) signal to the printer if it gets an unexpected response, for example when you try to enable the leveling system without a valid mesh loaded in memory. If you get an M112 interrupt error on your printer and want to ignore this warning, change the error handling settings in Octoprint:

Active the option "G90/G91 overrides relative extruder mode" in Octoprint Settings/Features if use the Arc Welder plugin.

You can use the plugin Bed Level Visualizer to get an image and the data of the mesh leveling for manual mesh or bltouch.

M155 S30  ; set temperature reporting delay, use a value longer than the time it takes for your leveling command to complete.
@BEDLEVELVISUALIZER  ; instruct plugin to start recording responses from printer.
M420 V    ; Get bed leveling mesh data.
M155 S3   ; set the temperature reporting delay back to a shorter time span.

M155 S30  ; set temperature reporting delay, use a value longer than the time it takes for your leveling command to complete.
G28 XYO   ; Do an optional XY home
G28 Z     ; Do a Z home
@BEDLEVELVISUALIZER  ; instruct plugin to start recording responses from printer.
G29       ; Take a ABL bed leveling mesh.
M155 S3   ; set the temperature reporting delay back to a shorter time span.

If this g-code script is not working for you, try increasing the value for the processing time in the Bed Level Visualizer plugin settings.

M155 S30  ; set temperature reporting delay, use a value longer than the time it takes for your leveling command to complete.
G29 P1    ; Take a bed leveling mesh.
@BEDLEVELVISUALIZER  ; instruct plugin to start recording responses from printer.
M420 V    ; Get bed leveling mesh data.
M155 S3   ; set the temperature reporting delay back to a shorter time span.

This firmware is compatible with the Octoprint plugin Marlin EEPROM Editor

Install the plugin Firmware Updater, with this plugin you be able to transfer and flash the firmware automatically.

For Ender 3v2

Select file and press "Flash from file"

https://youtu.be/Zv4aY6ALNLk