I recently needed an application to save data from a serial port to a text file. Although most terminal emulators like ProComm can handle this, it’s quite a lot of overhead for such a simple task. I came up with the following solution, which works for Windows only (b/c 90% of the interesting code is the low level serial interface, it would be totally different on Linux).

The code can be downloaded in either Source Code form, or as a Compiled EXE . To compile the source for yourself, simply run cl LogSer.cpp to compile with MS’s Visual Studio command line compilers.

Usage:
Run logser.exe <com port> <options> where options are:

• -d Display the data on the serial port
• -s Save the data from the serial port
• -o Overwrite the log (instead of appending)
• -b Specify the bitrate
• -p Specify parity settings (8n1, 7e2, etc)

Download:

• v1.0.0 source executable (115200 bps, 8N1 only)
• v1.0.1 source executable (configurable bitrate / parity)