[FeatureRequest]: Act on incoming MQTT subscription #1189
Description
Is your feature request related to a problem? Please describe.
I have two Duet 6HC boards connected over ethernet and USB to a Single RPI
Because my extrusion process is completely independent I want to trigger macros on the boards.
Preferably I can subscribe to a topic that for example tells me the heater has reached a certain temperature and now the other board needs to move the head assembly. When the head is moved I am sending a message over MQTT to the PI and the PI will forward this message over USB to the other board. This limits the distance between the two boards based on USB cable length.
What I would like to have is a board that can receive GCODE over MQTT and for example can start a macro depending on the payload.
It would be great if the firmware implements MQTT subscribe and receive GCODE commands
A workaround exists but it is tedious, as it requires USB and Ethernet connection to a RPI