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====== On-Board RS232 Port Protocol ======

This document defines the CFLink protocol for working with the on-board serial port found on the following CommandFusion hardware models:
  * [[hardware:lan-bridge|LAN Bridge]] (RJ12)
  * [[hardware:cf-mini|CF Mini]] (RJ12)
  * [[hardware:modular-base-units:din-mod4|DIN-MOD4]] (DB9 Female)
  * [[hardware:modular-base-units:mod4|MOD4]] (DB9 Female)
  * [[hardware:solo|Solo]] (2 x detachable 3-pin spring terminals)

Anywhere that ''MOD'', ''LAN'', ''MIN'' or ''SOL'' are used in outgoing commands, you can safely interchange with ''CFX''.\\
This goes for all commands sent to any CFLink device.\\
However, all //replies/notifications// will be sent with the correct 3 character device identifier for the device sending the data (''CFX'' is never used in replies except from bootloader notifications).

===== Queries =====

==== SPC - Query Serial Port Configuration ====

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

=== Data ===

The ''SPC'' query does not have any associated data.

=== Reply ===
<sxh cflink; light: true>
< [F2]<ID>[F3]RCFXSPC[F4]<PORT>:<MODE>:<BAUD>:<DATABITS>:<PARITY>:<STOP>:<FLOWCTRL>[F5][F5]
</sxh>

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

=== Example ===
<sxh cflink; light: true>
// Query the Serial Port configuration of a LAN Bridge on ID [02]
> [F2][02][F3]QLANSPC[F4][F5][F5]
// Reply with the configuration data, Serial Port is in Program mode
< [F2][02][F3]RLANSPC[F4]PGM:115200:8:N:1:0[F5][F5]

// Query the Serial Port configuration of a Solo on ID [03]
> [F2][03][F3]QSOLSPC[F4][F5][F5]
// Reply with the configuration data for both on-board serial ports
< [F2][03][F3]RSOLSPC[F4]P01:232:115200:8:N:1:0|P02:232:115200:8:N:1:0[F5][F5]
</sxh>

===== Configuration Messages =====

==== SPC - Serial Port Configuration ====

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.

=== Data ===
<sxh cflink; light: true>
> [F2]<ID>[F3]CCFXSPC[F4]<PORT>:<MODE>:<BAUD>:<DATABITS>:<PARITY>:<STOPBITS>:<FLOWCTRL>[F5][F5]
</sxh>

  * **<PORT>** = Only required if the device has more than one on-board RS232 port, such as the [[hardware:solo|Solo]].
  * **<MODE>** = The mode of the RS232 port:
    * ''OFF'' (Disabled) means the serial port is turned off, disabled entirely.
    * ''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.
    * ''TCP'' **SOLO ONLY** (RS232 Mode with TCP Server) is the same as ''232'' mode, except that a TCP Server socket is opened (TCP port 10208 for Serial Port 1, TCP port 10209 for Serial Port 2). Up to 4 TCP Clients can connect to each port, and data is simply piped between the TCP Client and the RS232 port. This is essentially turning the [[hardware:solo|Solo]] into an RS232 to Ethernet adapter.
  * **<BAUD>** = The baud rate of the RS232 port:
    * 100
    * 300
    * 600
    * 1200
    * 2400
    * 4800
    * 9600 (Default baud rate for [[hardware:solo|Solo]] RS232 ports)
    * 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). If flow control is enabled on Port 1 of the [[hardware:solo|Solo]], Port 2 will be automatically disabled entirely. Note that flow control cannot be enabled on port 2 of the [[hardware:solo|Solo]], only Port 1 on the [[hardware:solo|Solo]] has flow control capabilities.

=== Reply ===
<sxh cflink; light: true>
< [F2]<ID>[F3]RCFXSPC[F4]<PORT>:<MODE>:<BAUD>:<DATABITS>:<PARITY>:<STOP>:<FLOWCTRL>[F5][F5]
</sxh>

=== Example ===
<sxh cflink; light: true>
// Configure the on-board serial port for a LAN Bridge on ID [02] to be in RS232 mode, 9600 baud, 8:None:1.
> [F2][02][F3]CLANSPC[F4]232:9600:8:N:1:0[F5][F5]
// Reply
< [F2][02][F3]RLANSPC[F4]232:9600:8:N:1:0[F5][F5]

// Configure the on-board serial port for a Solo on ID [03] to enable Port 1 in RS232 mode, 9600 baud, 8:None:1. No changes made to Port 2.
> [F2][03][F3]CSOLSPC[F4]P01:232:9600:8:N:1:0[F5][F5]
// Reply
< [F2][03][F3]RSOLSPC[F4]P01:232:9600:8:N:1:0|P02:232:115200:8:N:1:0[F5][F5]
</sxh>

=== Error ===

  * 050 = Invalid COM Mode


==== TGT - Configure Notifications Targets ====

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.

=== Data ===
<sxh cflink; light: true>
> [F2]<ID>[F3]CCFXTGT[F4]<ID1>:<ID2>:<ID3>:<ID4>:<ID5>[F5][F5]
</sxh>
**<ID1-5>** = The target CFLink ID to forward incoming serial port data to. Use the No Change Option ''XX'' to leave a specific ID unchanged. The ID's should be in plain text format, 2 chars (A-F, 0-9).

=== Reply ===
<sxh cflink; light: true>
< [F2]<ID>[F3]RCFXTGT[F4]<ID1>:<ID2>:<ID3>:<ID4>:<ID5>[F5][F5]
</sxh>
=== Example ===
<sxh cflink; light: true>
// Forward incoming data from the Serial Port on LAN Bridge ID [02] to devices on CFLink ID's [03], [04] and [05]
> [F2][02][F3]CLANTGT[F4]03:04:05:XX:XX[F5][F5]
// Reply (CFLink ID's [07] and [09] were already being targeted from an earlier configuration)
< [F2][02][F3]RLANTGT[F4]03:04:05:07:09[F5][F5]
</sxh>
=== Error ===
  * 051 = Invalid COM Targets

===== Transmission Messages =====

==== SPW - Serial Port Write ====

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 ===
<sxh cflink; light: true>
> [F2]<ID>[F3]TCFXSPW[F4]<PORT>:<DATA>[F5][F5]
</sxh>

**<PORT>** = The port number to send the data to. Only used for devices that have more than one on-board RS232 port, such as the [[hardware:solo|Solo]].
**<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

=== Reply ===
<sxh cflink; light: true>
// In an effort to reduce network traffic, the reply does not contain the data sent.
< [F2]<ID>[F3]RCFXSPW[F4][F5][F5]
</sxh>

=== Example ===
<sxh cflink; light: true>
// Send a command out the on-board serial port of a CFMini on CFLink ID [03]
> [F2][03][F3]TMINSPW[F4]Hello World!\x0D[F5][F5]
// Reply
< [F2][03][F3]RMINSPW[F4][F5][F5]

// Send a command out the second on-board serial port of a Solo on CFLink ID [03]
> [F2][03][F3]TSOLSPW[F4]P02:Hello World!\x0D[F5][F5]
// Reply
< [F2][03][F3]RSOLSPW[F4][F5][F5]
</sxh>

=== Error ===

  * 052 = COM Buffer Overflow

===== Notifications =====

==== SPR - Serial Port Read ====

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''.

=== Data ===
<sxh cflink; light: true>
< [F2]<ID>[F3]R<DEVICE>SPR[F4]<DATA>[F5][F5]
</sxh>

=== Example ===
<sxh cflink; light: true>
// An incoming message "Hello World!" followed by a carriage return is received on the on-board serial port of a CFMini on CFLink ID [03].
// The CFMini is configured to send incoming RS232 data to CFLink ID's [02], [04] and [07]
< [F2][02][F3]RMINSPR[F4]Hello World!\x0D[F5][F5]
< [F2][04][F3]RMINSPR[F4]Hello World!\x0D[F5][F5]
< [F2][07][F3]RMINSPR[F4]Hello World!\x0D[F5][F5]
</sxh>
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