WinComm

WinComm is a software tool that was developed specifically to aid people in testing, sending and receiving data through the COM port, set up auto responders and heartbeat packets.

The upper hand of a portable app

The installation process can be bypassed altogether, as this product is portable. This means that the Windows registry is not going to be updated with new entries, unless you approve them.
Another important aspect is that you can easily place the program files to a USB thumb drive and run it from there on any computer you have been granted access to.

Connect to the port, adjust multiple parameters, set up heartbeats and auto responders

As stated above, this application enables you to connect to a COM port and test it in various manners. From the settings panel it is possible to configure several connection parameters.
For example, you can input baud rate, enable or disable DTR and RTS control, and specify parity, stop bits, byte size, XON and XOFF limit and error character. It is also possible to adjust COM timeouts, discard NULL bytes, abort read/write operations on error, monitor CTS and DSR output flow control, and make driver sensitive to DSR signal.
In addition to that, this program lets you use an ASCII mode, cut text when sending, send heartbeat at a user-defined interval, add auto responders by inputting the name, receive and send packet.

Bottom line

To conclude, WinComm is a pretty efficient piece of software when it comes to testing a COM connection. The interface is dedicated to all types of users and all jobs are completed in a timely manner and without popping errors, hanging or crashing.