5.2.4 Enter Command Mode ($$$)

Format: $$$

This command makes the RNBD451 module enter Command mode and display the command prompt. The device passes the characters as data, and enters the Command mode if it sees the $$$ sequence. If the Command mode guard bit is set using the SR command, the device checks if there are any bytes before or after the $$$ characters in a one-second window, the device does not enter Command mode, and these bytes are passed through. For more details on SR command, refer to 5.2.15 Set Application Options (SR,<hex16>).

The user can change the character string used to enter Command mode using the S$ command. For more details on S$ command, refer to 5.2.6 Set Enter Command Character (S$,<char>).

The UART receives a CMD> prompt indicating the start of a command session.