LYCO: hm, možná to je jen pro GRBL 0.9? Na
https://github.com/gnea/grbl/wiki/Grbl-v1.1-Interface o tom není ani zmínka (jen že je to výstup příkazu "$#").
Zkusil jsem to ručně přes picocom (sériový terminál) a skutečně tam ta odpověď není automaticky, ale $# ji normálně reportuje:
g38.2 z-10
ok
?<Idle|MPos:-113.000,-211.000,-34.505|FS:0,0|Pn:P|Ov:100,100,100>
$#
[G54:-113.000,-211.000,-34.500]
[G55:0.000,0.000,0.000]
[G56:0.000,0.000,0.000]
[G57:0.000,0.000,0.000]
[G58:0.000,0.000,0.000]
[G59:0.000,0.000,0.000]
[G28:0.000,0.000,0.000]
[G30:0.000,0.000,0.000]
[G92:0.000,0.000,0.000]
[TLO:0.000]
[PRB:-113.000,-211.000,-34.488:1]