M300 command "Unknown command"

  • Hi,

    i have my new Ender 5 pro with BLtouch. i have install de V4.2.2 firmware that is in the download section (https://www.creality.com/download). I need the buzzer to work but when i put the M300 command in my Gcode nothing happens. I am debugging the error and when i conected to my PC i found that the answer to the M300 command is:

    "Unknown Command: "M300"".


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