Key Benefits

• Easily read and write to local COM ports. Supports RS-232/RS-422 ports.
• Allows full configuration of COM port including; baud rate, parity, stop bits, data bits and flow control.
• Read and write data by single characters, strings or byte arrays.
• Supports synchronous and asynchronous reads and writes.
• Allows immediate writes (places character ahead of pending writes).
• Multi threaded - allowing communications on multiple COM ports simultaneously.
• Event notification to detect when data is available to be read and when data has been written.
• Event notification for line state changes including CTS, DSR, RING and RLSD (CD).
• bility to change state of flow control signals (RTS, DTR, XON/XOFF, Break).
• Supports multiport serial cards and hubs.

ComControl Professional Version

• Supports X/Y/ZMODEM file transfers. Handles error recovery during file transfers and allows file transfer cancellation.
• Data capture feature for logging or receiving ASCII files.
• Modem class supports many of the standard and enhanced AT commands. The Modem class can be used to answer incoming calls and make outgoing calls within a simple method.

Event Handling

ComControl raises events to notify the client application of significant events. The events include:

• ReadCompleted - Raised when an asynchronous read has read 1 or more characters.
• RINGLineChanged - Raised when the RING line has changed state (used to notify of an incoming call when communicating via modem).
• CTSLineChanged - Raised when the Clear To Send line has changed state.
• DSRLineChanged - Raised when the Data Set Read line has changed state.
• RLSDLineChanged - Raised when the Receive Line Signal Detect (aka Carrier Detect) line changed state.
• CharWaiting - Raised when a character is available to be read.
• XferProgress - Raised periodically during a file transfer to notify application of progress (Pro version).

Modem Interface

ComControl includes a modem interface to simplify communicating via a modem. The ModemObj class includes methods to encapsulate many of the standard and enhanced AT Commands. These methods can be used to dial out, receive incoming calls, set/get registers and adjust many other modem properties. Some of the methods are:

• DialNumber - Dial the specified phone number
• AnswerIncoming - Answer an incoming call (can be used in conjunction with RINGLineChanged event)
• AutoAnswerMode - Used to set the number of rings to auto-answer or disable auto-answer
• GetRegister - Get the value of a modem register
• SetRegister - Change the value of a register
• Hangup - Disconnect an active call
• CommandMode - Switch to command mode while a call is connected
• OnlineMode - Switch back to online data mode (from Command Mode) while connected
• SpeakerMode and SpeakerVolume - Used to set when the speaker is turned on and set the volume
• Reset and ResetFactory - Reset the modem using either a stored profile or the factory configuration

File Transferring

ComControl supports file transfers using standard protocols including XModem, XModem-CRC, YModem and ASCII. File transfers can be accomplished using a single method. ComControl can also be used to capture all data received on a comm. port and saving the data into a specified file. Capturing data can be started and stopped on the fly.

ComControl Main