Tech-Reader.blog

Solve: When Your Raspberry Pi Shows Up on the Router… but Vanishes from the Browser The Phantom Pi: Why You Can See It, But Can't Reach It You're staring at your router’s device list and there it is: your Pi-Star or MMDVM Raspberry Pi 3B+ proudly reporting an IP address. And yet, no matter what browser, laptop, or phone you try, the dashboard times out. No OLED display. No ping response. And definitely no web interface. What gives? This is a classic Raspberry Pi network ghosting issue—one where the board appears semi-functional but is, in reality, halfway to a coma. It’s not just frustrating—it’s misleading. Your instinct might be to blame your browser, your cabling, or even your imagination. But the root cause often lives deeper, buried in the Pi’s boot process, its web server config, or in cases like these, a corrupted Pi-Star image. Symptoms That Point to a Soft Brick What makes this more than a network problem is that you’re seeing two IP addresses (wired and wireless), and...

New Article on LinkedIn: Fibonacci's Eternal Sequence The Hidden Mathematics of Everything: Fibonacci's Eternal Sequence What started as a medieval mathematician's idle curiosity about rabbit breeding patterns has become one of the most profound discoveries in mathematics. In 1202, Leonardo Fibonacci posed a simple question that would unlock a universal pattern governing everything from the spirals of galaxies to the arrangement of seeds in a sunflower. In our latest LinkedIn article, we explore how the famous sequence 1, 1, 2, 3, 5, 8, 13, 21... reveals itself throughout nature with stunning consistency. Why do pinecones follow Fibonacci mathematics? How does the golden ratio emerge from this simple numerical pattern? And what does it tell us about the deep connection between mathematical beauty and the natural world? From the branching patterns in your circulatory system to the spiral arms of distant galaxies, Fibonacci's sequence appears to be nature's preferred ...

Insight: DragonOS on Raspberry Pi 5—Post #1 What to Expect and How to Prepare Introduction: A Powerful Distro Meets a Popular Board DragonOS is a specialized Linux distribution built on Ubuntu and tuned for software-defined radio (SDR), signal analysis, and cybersecurity. It comes preloaded with tools like GNU Radio, GQRX, SDR++, gr-inspector, and dozens more—all configured to work together seamlessly. It's the kind of distro that gives you a complete SDR toolbox right out of the gate. In 2025, more makers and engineers are asking a natural question: Can I run DragonOS on my Raspberry Pi 5? The answer is yes—but with important caveats. This post kicks off our DragonOS on Raspberry Pi 5 series by walking you through realistic expectations, performance limitations, and how to properly prepare your Pi 5 for success. Whether you're building a portable SDR rig, testing field capture setups, or exploring RF on a budget, this guide provides the foundation y...

Insight: Why DragonOS Runs Best on x86: Six Pain Points Raspberry Pi Users Need to Understand Introduction: Great Tools, Wrong Platform? DragonOS is a powerful Linux distribution that bundles together dozens of software-defined radio (SDR), signal processing, and cybersecurity tools. It’s a remarkable achievement—a true plug-and-play environment for radio tinkerers and field engineers. But here’s the rub: it was born on x86. While DragonOS has been adapted to work on the Raspberry Pi 4 and Pi 5, many users discover the hard way that this distro doesn’t feel at home there. Not yet. What follows is not a critique of the Raspberry Pi, nor a dismissal of DragonOS. It’s a clear-headed look at why these two technologies don’t always play well together—and why starting with x86 often leads to a better outcome. 1. Display Stack Incompatibility: KMS, DSI, and the Color Fade Trap On an x86 laptop or mini-PC, DragonOS boots cleanly into a full desktop with working graphics, thanks to mature drive...

Solve: When Your DSI Screen Goes Dark After Boot—DragonOS, Raspberry Pi 5, and the Mystery of the Flashing Touch Display Introduction: Everything Looks Fine—Until It Doesn't You’ve wired up a Raspberry Pi 5 with a ribbon cable to one of those slick 7-inch touchscreens, ready to boot into a specialized distro like DragonOS. You see the Ubuntu logo during startup. Promising. Then... nothing. Just a slow fade through various colors on the display, as if the screen’s confused or stuck in a demo mode. Plug in HDMI afterward, and suddenly everything works again. It feels like the screen is almost working—but somehow not quite. This post explains what’s going wrong and how to fix it, especially if you're running DragonOS or other advanced distros on a DSI-connected display. Why This Happens: Splash Screen vs Kernel Display Here’s the short version: the Raspberry Pi bootloader uses a simple framebuffer to show the initial splash screen. That part usually works no ...

Insight: What AWS Really Wants for the DevOps Competency To earn the DevOps Competency, a partner needs more than just technical skills—they need evidence of success, framed in AWS’s language, and customers who are willing to vouch for them. A Track Record of Success Successful projects mean two things: The delivery included clear DevOps practices: pipelines, IaC, monitoring, rollback, and automation. The impact is measurable—faster releases, better uptime, or stronger governance. Customers Must Participate Too And yes, customer participation is essential. AWS requires: At least two customer case studies, usually 3–5 pages each. Those customers must be willing to talk to AWS directly during the audit. The case studies must include high-level architecture diagrams and clear “before/after” outcomes. It doesn’t need to be sensitive or overly detailed—but the customer has to acknowledge: yes, they built that, and yes, it made a difference. So in short: technical proof + business outcome +...