Fixed a bug that the feature detection mechanism for unrecognized command is not implemented in the 'r' event callback
Fixed a bug that the feature detection mechanism for unrecognized command is not implemented in the 'r' event callback

cncjs/cncjs,cheton/cnc.js,cncjs/cncjs,cheton/piduino-grbl,cncjs/cncjs,cheton/cnc,cheton/piduino-grbl,cheton/cnc,cheton/cnc.js,cheton/piduino-grbl,cheton/cnc,cheton/cnc.js