Add AVR sanity check to prevent MONITOR_DRIVER_STATUS with SoftwareSerial#16421

Merged

thinkyhead merged 1 commit intoMarlinFirmware:bugfix-2.0.xfrom

sjasonsmith:AVR_SANITY_MONITOR_TMC

Jan 20, 2020

Commits on Jan 9, 2020

Add AVR sanity check to error when MONITOR_DRIVER_STATUS is used with SW Serial
sjasonsmith
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