Serial-Port Monitoring and Control Software
C# desktop and web tools for raw serial data, port configuration, logging and incremental monitoring during RFID/RS232 integration work.
During the 2014 RFID work, I developed serial-port configuration, logging and monitoring tools for diagnostic needs that the available terminal applications did not cover. These tools operated at the communication boundary between physical readers and the application.
Inspecting Raw Data
Before interpreting a device value, I needed to see the raw byte stream. Incorrect baud rate, parity, data bits or stop bits often do not produce a useful application-level exception; they produce incomplete or meaningless data.
The desktop tool therefore supported runtime serial configuration, raw stream observation and hexadecimal inspection where useful.
Logging Communication Context
Communication faults were not always immediately reproducible. Recording configuration, operation time and failure information together made it possible to reconstruct earlier behavior.
This was a small application, but it introduced an observability principle that remains useful in long-running systems: retain the context required to explain a failure, not only the final error string.
Web-Based Monitoring
I later developed a web layer that monitored the data and log files written by the desktop terminal. Instead of rereading the entire file on every refresh, the application tracked the last consumed position and fetched only newly appended content.
This limited unnecessary I/O as the files grew. Raw serial data and textual logs were handled separately, and the browser view was refreshed periodically.
Diagnostic Role
These tools helped separate device, physical connection, serial configuration and application interpretation during RFID troubleshooting.
Related work:
