Printer State

A printer conveys its state in the form of a JSON "Machine Model".

To get a live copy of your own model, browse to...

• Standalone: http://<your_duet>/rr_model?flags=d10
• SBC/DSF: http://<your_sbc>/machine/status

Neither will be formatted nicely but you can use one of the many web-based JSON formatters or run it through json_pp or jq on Linux.

The model structure should be the same regardless of the installation type.

Here's a copy of one from my own Duet3 State Object for RRF 3.2

Usage

To use the value of a state object field in your config file, you'd reference it by enclosing the name in '${}'. For instance, if you wanted to reference the "atxPower" field, you'd specify it as follows: "${state.state.atxPower}"

You aren't limited to just using the plain value. Anything specified between the { and } is interpreted as Javascript so let's say you wanted to display your bed temperature and force it to always have 1 digit after the decimal point. You could use "${state.heat.heaters[0].current.toFixed(1)}". Maybe you wanted to convert a "0" or "1" to "Off" or "On": "${state.state.atxPower ? 'On' : 'Off'}".