M300 command "Unknown command"
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"".