Raj Kumar – Page 14 – Embedded Prep

Master these Pointer Interview Questions Decide your Embedded and Linux Job (2026)

Dec 18, 2025

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Master real pointer interview questions in c for embedded and linux roles with clear examples, common traps, coding questions, and memory-level explanations. Pointers are one of the most important and most challenging topics in C programming interviews, especially for Embedded Systems, Linux System Programming, Linux Device Drivers, and RTOS (QNX / FreeRTOS) roles. A strong…

Master QNX Resource Managers for Beginners and Embedded Engineers (2026)

Dec 18, 2025

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Raj Kumar

in Embedded, QNX Operating System

Learn QNX Resource Managers step by step with real examples. Understand IPC, message passing, drivers, and how QNX services work in practice. Introduction of QNX Resource Managers If you are working with real-time systems, safety-critical software, or automotive platforms, you will eventually run into QNX. And when you do, one topic comes up again and…

Top 7 FreeRTOS Bugs That Crash Devices After 2–3 Days of Runtime

Dec 17, 2025

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Raj Kumar

in Embedded, FreeRTOS

FreeRTOS Bugs often cause devices to crash after days of uptime due to task, queue, interrupt, and memory issues. Learn real causes and proven fixes. FreeRTOS systems often run perfectly for hours or even days before suddenly crashing, hanging, or resetting without warning. These failures are rarely caused by obvious bugs. Instead, they come from…

ESP32 with TFT Display: Complete Beginner to Advanced Guide (With Real Examples)

Dec 16, 2025

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Raj Kumar

in ESP32 with TFT Display

Learn ESP32 wiht TFT display step-by-step. Wiring, pinout, Arduino code, ESP32-S3, CAM, projects, menus, GIFs & real examples for beginners. If you are getting into embedded systems, IoT, or DIY electronics, chances are you have already heard about ESP32 with TFT display projects. This combination is powerful, affordable, and extremely flexible. From simple temperature dashboards…

U-Boot Overview: Master Beginner-to-Expert Guide (2026)

Dec 15, 2025

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Raj Kumar

in Bootloader

U-Boot overview explained for beginners to experts. Learn what U-Boot is, boot sequence, Linux customization, scripts, code, and debugging in simple terms now If you have ever worked with embedded Linux, ARM boards, or custom hardware, you have definitely heard the name U-Boot. Sometimes people talk about it like it is mysterious low-level magic. In…

Zephyr vs FreeRTOS: Master Beginner to Advanced Tutorial (2026)

Dec 14, 2025

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Raj Kumar

in Embedded, Zephyr vs FreeRTOS

Zephyr vs FreeRTOS explained clearly for beginners to pros. Compare performance, STM32, ESP32, IoT use cases, and real code differences. If you’re working with microcontrollers and real-time systems, sooner or later you’ll face the Zephyr vs FreeRTOS question. It comes up whether you’re blinking LEDs on an STM32, building an ESP32-based IoT device, or designing…

ESP32 with OLED 1.3 Inch with ESP32 Master Beginner to Advanced Guide

Dec 13, 2025

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Raj Kumar

in ESP32 Display, ESP32 with OLED 1.3 Inch

Learn how to troubleshoot ESP32 with OLED 1.3 inch display. Fix blank screen, I2C issues, wiring errors, code problems, and display glitches easily. The ESP32 is one of those microcontrollers that quietly changed how hobbyists and professionals build connected devices. Add a 1.3 inch OLED display and suddenly your project feels complete. You can show…

Difference between const , volatile and const volatile (2026)

Dec 11, 2025

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Raj Kumar

in Interview Questions for Embedded SWE

Understanding the difference between const, volatile and const volatile in C and C++ with simple examples. A clear beginner-friendly guide for all levels. Understanding the difference between const , volatile and const volatile is one of those topics that every C and C++ programmer eventually has to master. These three keywords look tiny, but they…

0.96 Inch OLED Display with ESP32 Master Beginner to Advanced Guide

Dec 10, 2025

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Raj Kumar

in 0.96 Inch OLED Display, ESP32 Display

0.96 inch OLED display with ESP32 complete guide covering wiring, ESP32 OLED code, examples, common issues, and real projects for beginners. If you are working with ESP32, sooner or later you will want a display. LEDs are fine, serial monitor works, but nothing beats a small screen showing real data. That is where the 0.96…

ESP32 With MPU6050: Master Beginner to Expert Guide (2026 Edition)

Dec 9, 2025

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Raj Kumar

in ESP32 With MPU6050

Learn how to use the ESP32 with MPU6050 for accurate motion tracking. A complete beginner-friendly guide covering wiring, setup, code, troubleshooting, and real projects. Introduction: Why People Love ESP32 + MPU6050 Together If you’ve ever wanted to build a self-balancing robot, gesture-controlled device, drone, fitness tracker, robotic arm, or anything that senses motion, chances are…

Author: Raj Kumar