Compatible versions:

• RepRapFirmware 3.5.3-rc.1
• DuetWebControl 3.5.3-rc.1

API changes:

• Deprecated patch creation methods in the main object model class
• Deprecated current PatchObjectModel and SetPluginData calls in favour of new overload

Bug fixes:

• Added workaround to address Chromium singleton lock in the launch script
• Fixed potential deadlock when deleting variables
• Cancelled codes could invalidate the last known file position (pausing via M226)
• state.thisActive was not nullable

Compatible versions:

• RepRapFirmware 3.5.2-rc.1
• DuetWebControl 3.5.2-rc.1

Changed behaviour:

• DCS program memory cannot be moved to swap

New features:

• Added proxy support to custom HTTP endpoints

Bug fixes:

• Plugin config files were incorrectly deleted on upgrade
• Fixed M554 (set gateway/DNS server)
• Fixed code param conversion error with expressions (code.TryGet* methods)
• Some HTTP endpoints were using wrong JSON serializer options

Compatible versions:

• RepRapFirmware 3.5.0-rc.4
• DuetWebControl 3.5.0-rc.4

API changes:

• Introduced new code interceptor option to auto-expand expression parameters for filtered codes (defaults to true)
• Added new sbcConfigFiles field to plugin manifest. These files are not overwritten on upgrade
• Nested plugin data values can be queried in expressions (e.g. echo plugins.foobar.data.myObj.myProp)

Changed behaviour:

• If a file is supposed to use two file readers, it must be forked via M606 S1
• result variable is no longer maintained by DSF

New features:

• Object model and M122 report if 64-bit DCS build is used
• Added support for WiFi scanning (M587.1/M587.2)

Bug fixes:

• DCS could not determine if a network adapter uses DHCP or a static IPv4 address
• DPS no longer redirects stdio/stderr to DPS logger unless requested (systemd takes care of that anyway)
• Fixed file handling with boards that only provide a single file channel
• move.axes can be queried sequentially to support up to 30 configured axes
• Changed documentation generator to include <see cref="..."> statements
• 'g parameters were not correctly parsed
• Added and tested new axis letters to code parser
• Fixed type of move.segmentation.segmentsPerSec
• If a connection intercepting a code sent a code to another channel, that code was incorrectly assigned the same macro file (if any)

Compatible versions:

• RepRapFirmware 3.5.0-rc.3
• DuetWebControl 3.5.0-rc.3

New features:

• Added support for NetworkManager so that network M-codes can be used on Debian Bookworm
• M997 S2 can be used to update the system via apt update/unattended-upgrades on the latest DuetPi version (requires Debian Bookworm)
• M997 S2 V"<version>" can be used to install another DSF version (includes automatic update to corresponding RRF version) on DuetPi
• M997 S2 F"unstable" or M997 S2 F"stable" can be used to configure the package feed on DuetPi

Bug fixes:

• M929 always required a log filename (affected only v3.5)
• echo could be executed on inactive channels (e.g. File2)
• M122 could throw an exception if there were remaining codes in the Executed code pipeline handler
• Job file processor didn't synchronize OM right after the print started, potentially starting with an invalid inputs[].active state
• Identical expression requests yielded the same result if requested on two different code channels
• Fixed AppArmor webcam profile to support Spyglass

Compatible versions:

• RepRapFirmware 3.5.0-rc.2
• DuetWebControl 3.5.0-rc.2

Changed behaviour:

• If DCS fails to start, there is now a delay of 5 seconds between restart attempts
• Index web file served from the web server is never cached and must be revalidated by the web browser on reload

New features:

• Prepared Debian Bookworm support in the DWC launch script
• WiFi country may now be reported and updated using DuetPiManagementPlugin
• Added new SBC option for plugins to auto-restart them in case of unexpected crashes
• Added new object model fields introduced by RepRapFirmware
• When files are uploaded, they are uploaded to a ".part" file before they are moved into place

Bug fixes:

• Even number values containing dots were interpreted as integers and not as floats
• Fixed handling of non-ASCII characters in G-code parser
• Better enforce maximum length of arguments for meta G-code keywords
• Invalid enum values (in particular filament monitor types) could crash DCS
• Fixed IPC command to evaluate custom expressions
• Obsolete object model fields were not queried
• When custom endpoints attempted to return a status code, DWS incorrectly tried to write a body response as well

Compatible versions:

• RepRapFirmware 3.5.0-rc1
• DuetWebControl 3.5.0-rc1

New features:

• Added fileread and single-char support using apostrophes like in RRF
• Added auto flush option to code interceptor API. This is preferred to avoid race conditions under certain circumstances

Changed behaviour:

• If a RRF plugin contains daemon.g, it is renamed to daemon.g.bak on upgrade
• Moved userSessions root key to new sbc key
• M552 S1 unblocks WiFi automatically using rfkill

Bug fixes:

• Fixed M30 support
• Fixed default DateTime format in the object model
• WebSocket session key wasn't optional if no password set
• Corrected type of direct display screen instances in the OM definition
• Start-up errors were incorrectly set after booting
• Adjusted AppArmor permissions for webcam access on Debian Bullseye
• New DSF implementation of exists() function did not work with local/parameter variables

Compatible versions:

• RepRapFirmware 3.4.6-rc1
• DuetWebControl 3.4.6-rc1

Changed behaviour:

• Message boxes are closed automatically upon SPI disconnect

New features:

• Added missing InvalidateChannel call to API client
• G2/G3 may be repeated as well like G0/G1 (FANUC-style)
• Added new HTTP endpoint /machine/model as an alternative to /machine/status

Bug fixes:

• Fixed reverse parsing when dealing with UTF8 CPs
• Backported potential code parser fix from v3.5
• SPI interface was not invalidated when the connection could be established again after a timeout
• Fixed update.sh handling in system pkg installs
• Added different stat implementation to make DSF work with newer kernels
• Fixed M552 S1 P parameter (SSID)
• Fixed Marlin emulation for meta expressions
• Priority codes didn't prefer originally requested channel
• Moved flush in job task to fix potential deadlock
• Fixed removal of plugin www files
• M550 did not update /etc/hosts
• Fixed issue where missing DNS servers could crash DCS
• Fixed plugin files field in the DuetPiManagementPlugin manifest
• Fixed meta expression queries of plugin values

Compatible versions:

• RepRapFirmware 3.4.2-rc3
• DuetWebControl 3.4.2-rc3

Upgrade notes:

• Instead of the previous apt upgrade command it is now required to use apt dist-upgrade. Users of unattended-upgrade are not affected

New features:

• Program from the duettools package now provide return codes and come with improved error handling

Bug fixes:

• pip3 (Python 3) is now used for dependency installations instead of pip (Python 2.7)
• Disposal of already closed code files could lead to unexpected exceptions

Compatible versions:

• RepRapFirmware 3.4.2-rc2
• DuetWebControl 3.4.2-rc2

Changed behaviour:

• Job task flushes pending codes one last time on completion to allow for user-generated G-codes

Bug fixes:

• Codes from an intercepting connection were intercepted again by the same connection

Compatible versions:

• RepRapFirmware 3.4.2-rc1
• DuetWebControl 3.4.2-rc1

New features:

• Added new "tags" string array to plugin manifest

Bug fixes:

• Made SPI error recovery on empty data more robust

Compatible versions:

• RepRapFirmware 3.4.1-rc2
• DuetWebControl 3.4.1-rc2

New features:

• Added OpenAPI definition for HTTP APIs

Changed behaviour:

• Main object model class is no longer sealed

Bug fixes:

• Improved logging in IPC backend to avoid unnecessary memory allocations
• Rotary delta configurations set the wrong kinematics type in the object model
• Added network.interfaces[].state in SBC mode
• Sequential printing could provoke an exception in the layer update code (i.e. when the layer number went down)

Compatible versions:

• RepRapFirmware 3.4.1-rc1
• DuetWebControl 3.4.1-rc1

Changed behaviour:

• Improved SPI protocol error handling
• DCS outputs an info message when the connection is lost because of too little CPU time

Bug fixes:

• DSF user and AppArmor templates were missing permissions for webcam access on Debian Buster
• Some object model values were not reactive in DuetAPI
• Usage of the custom input shaper was not supported
• M112 and M999 did not wait for potential firmware updates to finish first
• Code files could be edited while they were being processed
• DuetHttpClient did not set valid X-Session-Key when reconnecting to Duets in SBC mode

Compatible versions:

• RepRapFirmware 3.4-rc2
• DuetWebControl 3.4-rc2

Upgrade notes:

• Now DSF uses pip for management of third-party Python libraries. It is recommended to install it using sudo apt install python3-pip
• The default group of I²C device nodes has been changed to gpio. If you are using I²C, make sure that applications accessing it are part of the gpio group (e.g. via gpasswd -a <user> gpio)
• When you upgrade the DuetPiManagementPlugin package from v3.4-b6 or older, you will see an error message due to a missing dependency of the old package being upgraded (Error: An assembly specified in the application dependencies manifest (PluginManager.deps.json) was not found). You can ignore this message, it should be fixed as soon as v3.4-rc1 or newer is installed.

New features:

• Implemented new GPIO permission (includes I2C and SPI devices) for third-party plugins
• Added new array to plugin manifest allowing custom installation of Python libraries via pip (requires pip to be installed first)
• Thumbnail data is now checked for valid base64 content before it is assigned

Bug fixes:

• DWC launch script was not included in the source files
• Even object heights were not correctly processed
• duettools package was not fully updated before the update of duetpimanagementplugin started resulting in possible (yet harmless) error messages
• M997 and M999 could show "Operation has been cancelled" rather than completing normally
• When plugins were uninstalled and they were auto-started, they were not removed from the auto-start list
• Update prompt did not display expansion board names
• Absolute file paths without leading slash (e.g. M98 P"0:macros/foo.g" instead of M98 P"0:/macros/foo.g") were not correctly processed by DSF

Compatible versions:

• RepRapFirmware 3.4-rc1
• DuetWebControl 3.4-rc1

New features:

• Added thumbnail support

Changed behaviour:

• DuetPiManagementPlugin uses relative file paths to support more Linux distros

Bug fixes:

• Tool for custom HTTP endpoints did not replace query values when starting other programs
• Packaged plugins (like duetpimanagementplugin) could be uninstalled using DWC
• Removed redundant info message during upgrade from removal script

Compatible versions:

• RepRapFirmware 3.3-rc3
• DuetWebControl 3.3-rc3

Bug fixes:

• M0 called stop.g instead of cancel.g when a print was cancelled
• DCS does no longer check SPI responses from IAP while upgrading the firmware to lower the risk of upgrade issues
• Plugins were never started in non-SPI mode
• DCS postinst script failed if the service was previously enabled but no Duet was attached at the time of the upgrade
• When codes were intercepted, the SourceConnection property was not always populated
• When DCS was configured to never terminate on reset, sometimes it failed to establish a connection again
• Subscribe connection clients failed to clear global dictionary on reset
• Fixed exists function in conditional G-code
• When retrieving file info, DCS returned the simulated time instead of the slicer time
• Fixed timing issue causing simulation times to be written incorrectly to G-code files

Compatible versions:

• RepRapFirmware 3.3-rc2
• DuetWebControl 3.3-rc2

New features:

• Added new Disconnected state to indicate when DSF/DWC is not connected to RRF
• .deb packages can be installed over DWC if support for package management and root plugins is enabled (see plugins.json and config.json)

Changed behaviour:

• Only G0 and G1 are repeated for Fanuc-style G-code to follow RRF implementation
• M955 P-parameter is passed as a driver identifier like M569 P
• Added extra fallbacks for main firmware files (directories.firmware -> 0:/firmware -> 0:/sys)

Compatible versions:

• RepRapFirmware 3.3-rc1
• DuetWebControl 3.3-rc1

New features:

• Added support for abbreviated G-codes in CNC and Laser mode (Fanuc and LaserWeb G-code style)
• Added new code streaming mode to the API for easier Repetier and Octoprint integration
• Implemented new command line utility to test and demonstrate the new code stream mode

Bug fixes:

• Global variables in the OM were not cleared when DSF lost connection to RRF
• When prints were paused during macros, under special cirumstances the macro was run again on resume

Compatible files:

• RepRapFirmware 3.2.0-rc2
• DuetWebControl 3.2.0-rc2

Changed behaviour:

• Increased SPI connection timeout from 2.5s to 4s (same value as in RRF)
• Partial SPI transmissions may not take longer than 500ms (same value as in RRF)

Bug fixes:

• M997 and M999 could generate "Operation has been cancelled" errors
• When DCS terminated sockets of command connections were not correctly shut down
• Object model write locks were not correctly disposed of when DCS terminated
• Calling abort in macro files could cause an exception
• M501 could freeze if no config-override.g was found
• "Macro not found" warning messages were not output as part of code results

Compatible files:

• RepRapFirmware 3.2.0-rc1
• DuetWebControl 3.2.0-rc1

Changed behaviour:

• RRF downgrades from later protocol versions are now possible
• CORS headers are only sent if explictly configured by M586 C-parameter
• SPI transfers use CRC32 instead of CRC16 with new protocol version
• DCS service notifies systemd when it is up and running
• DCS terminates when a firmware update of the main board is complete (unless NoTerminateOnReset is set)
• runonce.g is no longer processed if DCS starts in update-only mode (i.e. with -u parameter)
• Third-party DSF plugins cannot be installed any more (TBD for v3.3)

Bug fixes:

• Fixed incompatibilities when updating RRF from older firmware versions
• LockMovementAndWaitForStandstill retransmissions were logged
• Expressions were not automatically evaluated in the code processors
• Internally processed codes were only logged if they resulted in a warning or error
• DWS didn't send correct Cache-Control header which could result in DuetPi using outdated DWC versions
• Sometimes the filament mapping was not fully restored if the NoTerminateOnReset option was enabled
• M929 was not fully implemented for new log levels