This document defines the CFLink protocol for working with the on-board serial port found on the following CommandFusion hardware models:

• LANBridge (RJ11)
• CFMini (RJ11)
• DIN-MOD4 (DB9 Female)
• MOD4 (DB9 Female)

The SPC query requests the current on-board RS232 port settings of a device.

The SPC query does not have any associated data.

See the SPC command for details on each returned data parameter.

The SPC (Serial Port Configuration) command is used to configure the properties of the serial port such as Port Mode, Baud rate, Flow Control, etc.

• <MODE> = The mode of the RS232 port:
  • PGM (Program Mode) means incoming data must be valid CFLink formatted commands, and allows you to send data to any device on the CFLink network via RS232. All CFLink data received by the device will also be sent out the RS232 port in this mode.
  • 232 (RS232 Mode) means incoming data is sent only to devices that are configured via the TGT command. The incoming RS232 data will be wrapped in a SPR reply before being sent to the target devices. Data is sent to the RS232 port using the SPW command when in this mode.
• <BAUD> = The baud rate of the RS232 port:
  • 100
  • 300
  • 600
  • 1200
  • 2400
  • 4800
  • 9600
  • 14400
  • 19200
  • 38400
  • 57600
  • 115200 (Default Program Mode baud rate)
  • 128000
  • 256000
• <DATABITS> = The data bits of the RS232 port, always 8.
• <PARITY> = The parity of the RS232 port (single uppercase char):
  • N = None
  • O = Odd
  • E = Even
• <STOPBITS> = The stop bits of the RS232 port (1 or 2).
• <FLOWCONTROL> = The flow control of the RS232 port (0 = None, 1 = RTS/CTS).

• 050 = Invalid COM Mode

The TGT command configures which CFLink ID's on the CFLink network will receive incoming messages when data is received on the serial port whilst in RS232 mode 232.
If the serial port is in Programming Mode PGM, then this configuration is ignored, no data is sent to the target devices. Instead all incoming data is handled by the device with the Serial Port, and must be a valid CFLink message or it will be ignored.

• 051 = Invalid COM Targets

The SPW (Serial Port Write) command is used to write data to a device connected to the on-board serial port. This command is ignored in PGM mode.

<DATA> = The data to be written out the on-board serial port. Hex bytes must be entered in \xFF format. eg. A carriage return is written as \x0D

• 052 = COM Buffer Overflow

The SPR notification contains incoming serial data, received from the on-board RS232 port when in RS232 Mode 232.
The reply is only sent to the CFLink ID's configured via the TGT command. This reply is never generated when serial port is in Program Mode PGM.