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machine_variable (BCP command)

This is a generic "catch all" which sends machine variables to the media controller any time they change. Machine variables are like player variables, except they're maintained machine-wide instead of per-player or per-game. Since the pin controller will most likely track hundreds of variables (with many being internal things that the media controller doesn't care about), it's recommended that the pin controller has a way to filter which machine variables are sent to the media controller.

Origin

Pin controller

Parameters

The parameters prev_value and change are only present if there was a change. When monitoring of machine variables is started, MPF will send the current state of all machine variables without these two parameters.

name

Type: string

This is the name of the machine variable.

value

Type: Varies depending on the variable type.

This is the new value of the machine variable.

prev_value

Type: Varies depending upon the variable type.

This is the previous value of the machine variable. This parameter is only included if there was a change.

change

Type: Varies depending upon the variable type.

If the machine variable just changed, this will be the amount of the change. If it's not possible to determine a numeric change (for example, if this machine variable is a string), then this change value will be set to the boolean True. This parameter is only included if there was a change.

Response

None

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