RN4678 - Enter Command Mode (CMD) Via GPIO Pin

If the 0x8000 bit in the FEATURE SET BITMAP is set, the RN4678 is set into Fast mode.

In this mode, the command $ is no longer available to put the device into Command mode, rather, the CMD/DATA switch pin defined using the SX command controls the device operation mode (high for Data mode and low for Command mode).

The command SX, , is used to set the functions of the individual pins available on the module. For example, SX,01,0B will assign the command/data switch pin function to pin P05.

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Refer to the "RN4678 Bluetooth® Dual Mode Module Command Reference User’s Guide", available on the RN4678 product page, for more information.

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