NaN in Practice: What It Is, When to Use It, and How to Parse It Safely
Practical guide to NaN: IEEE 754 behavior, parsing in different languages, when it helps, and how to protect code from silent bugs.
C
MQTT Protocol: A Practical Guide with Code Examples, Libraries, and Real-World Use Cases
A practical guide to MQTT protocol for embedded systems and IoT. Learn how MQTT works, QoS levels, retained messages, libraries in C/Python/JavaScript/Go, and real-world use cases with code examples.
Linux Signals: Custom Ctrl+C Handler (SIGINT, SIGUSR1, SIGALRM)
Short practical Linux signals guide with one full C example: change Ctrl+C behavior, send SIGUSR1, and use SIGALRM timeout.
Linux IPC in Embedded Systems: Short Practical Guide
A short practical guide to Linux IPC for embedded Linux: pipes, message queues, shared memory, Unix sockets, and signals with pros/cons and code snippets.
Command Injection in C/C++: Why system() with User Input is Dangerous (with Practical Examples)
A practical, beginner-friendly guide to understanding and preventing command injection vulnerabilities in C/C++ applications, with real-world examples and secure coding advice.