If you want to control a button, such as a mute button, any value between 00 and 7F sent to the control will result in a return value of 00. Any value between 80 and FF will result in a return value of FF.
For example, if you send the following command to mute channel 2:
S2oM3E.
the channel mute button will be activated. Since the switch can only be on or off, it will be set to off, and return:
V2oM00.
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