MoonNode

MoonNode is a set of nodes which enable Node-Red to interface with the Moonraker API and Klipper.

Moonraker enables websocketed API access to Klipper, which is control software used to execute g-code to operate a physical machine. This is typically used by 3d Printers, CNC machines etc..

MoonNode enables easy connection to Moonraker and constructs a model representing the current state of the Machine objects chosen for monitoring. The model is a JSON object and is constantly updated by Moonraker.

MoonNode has been written to enable easy access to realtime printer/machine status data in NodeRed, which is useful for monitoring multiple printers/machines or integrating the printer/machine into an existing dashboard.

MoonNode has 4 nodes:

• MoonNode-Connector (control node) : Stores the mode & connection details enabling the web-socket connection to Moonraker.
• MoonNode-Monitor: Creates the web-socket connection to Moonraker and processes the model updates.
• MoonNode-Event : Parses the updated model for a specified object value change, and triggers when a match if found.
• MoonNode-CMD: Send a g-code or command to Moonraker for action.

Please referr to the moonNode wiki for information on installation and use.

moonNode uses the following libraries/modules:

• DeepMerge
• axios
• jasonpath
• ws

Changelog:
0.0.4 -- Monitor node now auto recovers should Moonraker disconnect or report errors. Added Connection Msgs output to Monitor Node for debugging connections etc.
0.0.5 -- Fixed potential issue with keepalive monitor.
0.0.6-0.0.12 -- Fixed small issues with autorecovery, updated help text, fixed reporting bugs & added more failure conditions to autorecovery.
0.0.13 -- Monitor node now allows user to choose which machine objects to monitor.
0.0.14 -- Added filament sensor and display status to the list of monitored objects.
0.0.15 -- Added ability to set sensor & macro names for selected objects.
0.0.16 -- Fixed some issues with autostart and error recovery.
0.0.17 -- Fixed monitor not always stopping on receipt of "OFF" msg.
0.0.18 -- Changed Monitor Node to get list of subscribable objects from MoonRaker directly, fixed issue with CMD node crashing.
0.1.01 -- Added Status Indicators to Monitor Node.
0.1.2 -- CMD Node behaviour changed. Web socket remains open after the first command, unless stateless switch enabled. This change enables multiple commands to be streamed to Moonraker/Klipper at a high rate (tested @ 20ms interval between each command).
0.1.3 -- Minor update to allow for msg's without a payload.
0.1.4 -- Improved API error handling to prevent crash when an Invalid API is entered, + added notice to deploy when connection properties are changed.
0.1.5 -- Added queue to CMD node to enforce processing of commands in the sequence they were received by the node. Users can clear current queue by injecting msg.payload.cmd: "CANCEL".
0.1.6 -- Added RAW output to Monitor node which outputs the latest received JSON from MoonRaker without any processing. Updated toolhead.position logic to replace previous values in the fullmodel output instead of adding to existing postion data.
0.1.7 -- Bug fix to resolve inconsistent javascript behaviour. NOTE: If upgrading from a version prior to V0.0.18 you will need to re-configure all deployed Monitor Nodes.