FluidNC commands and setting use a $ format. They can only be used in idle mode.

Commands are used for actions (like homing or disabling motors) or retrieve information (like gcode offsets). You can get a complete list of them with the $CMD command. Many commands have a full name format as well as a shorter version. Like $Gcode/Mode and $G. All standard Grbl $ commands are supported.

Note: Details for each command will be added soon.

• $Settings/Restore or $RST
• $GCode/StartupLines or $N
• $Build/Info or $I
• $System/Sleep or $SLP
• $Home/C or $HC
• $Home/B or $HB
• $Home/A or $HA
• $Home/Z or $HZ
• $Home/Y or $HY
• $Home/X or $HX Home the X axis only
• $Motor/Disable or $MD Disable all axes. Or you can disable them by letter, like $MD=X to disable the X axis. All axes will automatically enable when any motion command is received.
• $Home or $H Home all axes as the cycles are setup in the YAML file
• $GCode/Offsets or $#
• $Settings/Stats or $V
• $Settings/Erase or $NVX
• $Alarm/Disable or $X
• $GCode/Check or $C
• $GCode/Modes or $G
• $Errors/List or $E Use to show the meaning of errors. $E will show you them all. $E=3 will tell you what error 3 means.
• $Alarms/List or $A
• $Commands/List or $CMD
• $Settings/ListChanged or $SC
• $Settings/List or $S
• $Limits/Show or $Limits
• $GrblNames/List or $L
• $GrblSettings/List or $$
• $Jog or $J
• $State or $T
• $Help or $
• $Config/Dump or $CD
• $WebUI/Help or $ESP
• $WebUI/Help or $ESP0
• $WebUI/List or $ESP400
• $WebUI/Set or $ESP401 =P=position T=type V=value
• $Radio/State or $ESP115 =ON|OFF
• $SD/Status or $ESP200
• $SD/List or $ESP210
• $SD/Delete or $ESP215 =file_or_directory_path
• $SD/Run or $ESP220 =path
• $SD/Show or $ESP221 =path -$LocalFS/Delete =path
• $LocalFS/ListJSON =path
• $LocalFS/List =path
• $LocalFS/Run or $ESP700 =path
• $LocalFS/Show or $ESP701 =path
• $LocalFS/Format or $ESP710 =FORMAT
• $LocalFS/Size or $ESP720
• $Bye =RESTART
• $System/Control or $ESP444 =RESTART
• $System/Stats or $ESP420
• $Firmware/Info or $ESP800

Settings are used to set saved values. Most settings are now in the config file, but there a a few like $Confg/Filename that need to be outside the config file. You can see all of them with $S. We only support a few standard Grbl $ settings. We tried to support any setting that might be used during normal operation like $10. Standard Grbl settings that are used to setup a machine are not supported. This is because FluidNC has many times more settings than Grbl.

You set the value by setting a value like this $Config/Filename=test.yaml. You can see the current value by just sending the setting name like $Config/Filename. If you send just a part of the setting name like $STA, all setting with STA in the name will be show with their current values.

Settings have different types like integer, float, String and Enum. Enum is one of a list of values. You can see the valid type by sending something like $Wifi/Mode=*. It will respond with [MSG:INFO: Valid options: Off AP STA STA>AP].

The list of settings depends whether your firmware was compiled for WiFi or Bluetooth. Below is a list of all settings.

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