Practical Tools and Knowledge for Engineers
Free engineering tools, technical articles, practical tips, and resources for automation, embedded systems, electronics, industrial communication, and software development.

HexSpy: Technical Utility
A lightweight utility designed for the technical engineer to inspect, convert, and analyze hexadecimal data streams with precision and speed.
Real-time Inspection
Typical Use Cases
Visualize raw binary data streams in real-time with a clean, technical interface optimized for industrial automation and embedded systems.
Debugging serial communication issues between PLCs and industrial sensors.
Inspecting firmware boot sectors and memory dumps for embedded systems.
Validating data packets in Modbus RTU and TCP communication protocols.
Version History
Protocol Analysis
Decode complex communication protocols including Modbus, RS-232/485, and custom serial formats to identify errors and verify data integrity.
v1.0.0 — Initial Release: Core inspection and conversion utilities.
v1.1.0 — Added support for Modbus protocol analysis and packet logging.
v1.2.0 — Performance optimizations and improved user interface.
Hexadecimal Conversion
Convert between hexadecimal, ASCII, and binary formats instantly. Essential for firmware development, hardware debugging, and data recovery.