React to commands coming from the printer (M118)

[probonopd]

We could react to certain commands coming from the printer. This could be used e.g., to trigger the printing of certain files stored on the WirelessPrinting SD card such as calibration patters, the last printed GCODE, etc.

Of course the printer firmware would need to be modified to send such commands, or have them stored in the printer SD card.

http://marlinfw.org/docs/gcode/M118.html

E.g.,

M118 A1 action:repeatlastgcode

to send the last GCODE file again.

[probonopd]

Similarly, this could be used to configure WLAN:

M118 A1 action:setwlan:ssid:password

or something along those lines.