Add support for EMERGENCY_PARSER (and HOST_PROMPT_SUPPORT)

Barak_H · 5 March 2022 11:33

Trying to send action to printer prompts from octoprint requires EMERGENCY_PARSER to send M876 commands to the printer.

Without it, you can’t interact with the printer prompts via octoprint.
(this assumes HOST_PROMPT_SUPPORT is already enabled, if not that is required as well.)

For ref:

github.com/OctoPrint/OctoPrint

M876 not being force-sent while printing

opened 12:50AM - 22 Aug 20 UTC

closed 02:50PM - 30 Nov 20 UTC

ZhuDaHai

bug done approved

#### What were you doing?  1. Embed M600 gCode command on layer 51 of my 100 layer print 2. Print gCode file with OctoPrint 3. Printer reaches Layer 51 and executes the M600 command by pausing the print, parking the head and retracting the filament 4. OctoPrint prompts with a 'Print Paused' popup with a 'Dismiss' button 5. I insert a new roll of filament and click on 'Dismiss' - nothing happens 6. A short time later a new popup appears: "Print Head Heater Timeout" with a REHEAT button. 7. I press the REHEAT Button and nothing happens, the hot-end continues to cool down. 8. At this point, I cannot do anything A) The main Printing button is depressed B) The Pause button is disabled C) the Cancel button is disabled D) The State is Pausing E) No controls on the Control Tab are enabled 9. My only recourse is to shut off the printer and start it again - aborting the print entirely I am using OctoPrint version 1.4.2 OctoPi version 0.17.0 Marlin 2.0.6 from the MakerBase fork of Marlin, as support for the MKS SGENL V2.0 mainboard is not yet integrated into Marlin's release branch (there is a pull request for it, but its not made it into a release as of 2.0.6 of Marlin) I have check all closed Issues in Marlin for anything related to M600 support, and even the latest fix #18565 (Broadcast Host Actions) is integrated in my Marlin Release, including all the closed issues. There are no current open issues in Marlin related to M600 and Host Commands In Marlin configuration_adv.h, i have enabled these lines to enable Host Actions and Host Prompt Support: ``` #define HOST_ACTION_COMMANDS // DaHai : Enabled for OctoPrint M600 Support #if ENABLED(HOST_ACTION_COMMANDS) #define HOST_PROMPT_SUPPORT // DaHai : Enabled for OctoPrint M600 Support #endif ```  #### What did you expect to happen? I expected to behave as the M600 was written: 1) Pause the print (**works**) 2) Park the head (**works**) 3) Retract the filament (**works**) 4) Prompt user to insert new filament to the extruder motor (**_not working_**) 5) Load the filament through the nozzle after user confirms filament is loaded **_(not working_**) 6) Prompt use to choose 'Extrude More' (to further extrude the filament and clear the old color) or 'Continue' (to resume printing where it left off) (**_not working_**) Basically, as I understand it M600 Host Action Commands and Host Prompt Support was implemented in Marlin for 'Smart' Host controllers, like OctoPrint, as it is stated on the RepRap Wiki found here and referenced in Marlin configuration_adv.h: https://reprap.org/wiki/G-code#Action_commands And that these commands allow smart host controllers to handle M600 Filament change commands just like dumb LCD displays, like the RepRap Discount Smart Controller with a text display and push button wheel. #### What happened instead? The Print Paused and the Head Parked and the Filament was unloaded, but none of the prompts appearing in OctoPrint allowed the new filament to be extruded or the print to be resumes (as described multiple times above) #### Did the same happen when running OctoPrint in safe mode?  If I try this in Safe Mode, that disables all Plugins, including 'Action Command Notification Support' and 'Action Command Prompt Support', both by Gina Häußge, which is required for this to work. Both of these plugins are up-to-date and active. Now, if that means I need to submit a bug report for those plugins, then I apologize and will do so. #### Version of OctoPrint  OctoPrint version 1.4.2 #### Operating System running OctoPrint  OctoPi version 0.17.0 #### Printer model & used firmware incl. version  JGMaker A6 running Marlin 2.0.6 MakerBase fork for the MKS SGENL V2.0 mainboard. #### Browser and version of browser, operating system running browser  Chrome v84.0.4147.137 #### Link to octoprint.log  https://drive.google.com/file/d/1Tk9ueh6iqRkbmMe2Z2F3h78-OGJ9AsBw/view?usp=sharing #### Link to contents of terminal tab or serial.log  And the Terminal tab just shows: ``` Recv: echo:busy: paused for user Recv: echo:busy: paused for user [...] Recv: echo:busy: paused for user [...] Recv: echo:Press button to heat nozzle Recv: echo:busy: paused for user [...] ``` #### Link to contents of Javascript console in the browser  #### Screenshot(s)/video(s) showing the problem:  I have read the FAQ. P.S. Updated the Google Drive link so anyone can use it. Sorry!