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Satellite IoT for Remote Asset Monitoring: Designing a Secure Message Protocol Over Iridium SBD
A remote industrial site — far enough from any cellular tower or LoRaWAN gateway coverage that terrestrial connectivity simply isn't an option — still needs its sensor data to reach a central monitoring location, reliably and securely. Satellite communication is the obvious answer to the reachability problem and a genuinely non-obvious engineering problem once security and cost enter the picture, because satellite airtime is expensive per byte in a way terrestrial connectivit
Srihari Maddula
Aug 238 min read


OTA Updates in the Field: The Problem Nobody Talks About Until It's Too Late
Three months after deployment of a 120-node IoT network, the engineering team discovered a timing bug in the transmission scheduler. Under specific load conditions, nodes would collide on the shared RF channel, causing packet loss that cascaded into data gaps. The fix was 12 lines of firmware code. Review, test, and validation took two days. The field update took eight days, two engineers, and travel across three districts. Because there was no OTA mechanism in the firmware.
Srihari Maddula
Jul 275 min read


LoRa vs Cellular vs Wi-Fi: Choosing Connectivity Like an Operator, Not an Engineer
The Wrong Starting Point Most connectivity decisions in embedded IoT development begin in the wrong place. They begin with the engineer's familiarity. The team has shipped three products with a cellular module. They reach for cellular again. A developer has spent two weeks getting a LoRa gateway running on a previous project. LoRa goes on the shortlist before the deployment requirements are written. The Wi-Fi stack is already in the microcontroller. Why not use it? This is no
Srihari Maddula
Apr 1916 min read


IoT Architecture: How to Build Scalable SDKs for Global Products?
Reading Time: 25 mins Topic: IoT Architecture & Scalability Bridging the gap between academic projects and industry reality. Global IoT Network The Hook: Why Your MVP SDK Won't Survive Production Building an IoT device that connects to the cloud and sends telemetry is easy. Doing it for one device is a weekend project. Doing it for a hundred devices is a manageable pilot. But what happens when you need to deploy 1,000,000 devices across 50 countries, spanning three major clou
Srihari Maddula
Mar 156 min read


The Invisible Language of Wireless: How Open-Source DSP and SDR Cores Are Powering the Next Generation of Radios, Satellites and Chipsets
A phone call.A drone video feed.A satellite downlink.A Wi-Fi packet.A radar sweep. They all seem simple on the surface — but under every one of these technologies lies the same invisible foundation:Digital Signal Processing (DSP). DSP is the mathematics that turns radio waves into information.It’s the invisible layer that powers nearly every communication system — from smartphones to satellites. Two decades ago, this was the territory of defense labs and chip manufacturers.To
Srihari Maddula
Nov 11, 20255 min read


Global IoT Connectivity – Regional Adoption, Spectrum, and Protocols
The Internet of Things (IoT) is a global phenomenon. But unlike the internet, where TCP/IP creates a near-universal layer, IoT connectivity remains fragmented by region. The reason is simple: Spectrum regulations differ across countries. Telecom operator strategies vary. Industry ecosystems have evolved differently. Proprietary protocols and legacy systems remain entrenched in some markets. The result? A logistics tracker built for NB-IoT in China may not work in the US, whil
Eurth Engineering
Nov 1, 20255 min read


Part 7: Emerging & Future IoT Technologies – Towards 6G, Ambient IoT, and Quantum-Safe Connectivity
Over the past six parts of this series, we’ve explored the entire spectrum of IoT communication technologies – from cellular and satellite IoT (NB-IoT, 5G, Starlink) to short-range wireless (BLE, ZigBee, Wi-Fi), LPWAN (LoRa, Sigfox, Mioty), wired/optical systems (Ethernet, KNX, Fiber), and industrial-grade mission-critical protocols (Wireless HART, ISA100, DECT-2020, TETRA). Now, in this final part, we’ll look ahead to what’s next for IoT connectivity. Technology never stands
Eurth Engineering
Oct 31, 20254 min read


Part 6: Industrial & Mission-Critical IoT – Wireless HART, ISA100, DECT-2020 NR, and TETRA
Most IoT deployments focus on convenience, efficiency, and cost savings. But in industrial and mission-critical environments – oil rigs, chemical plants, power grids, defense, and emergency response – the stakes are much higher. Here, downtime can cost millions, and failures can risk human lives. These environments demand ultra-reliable communication, deterministic performance, strong security, and resilience to interference. This is where industrial and mission-critical IoT
Eurth Engineering
Oct 31, 20254 min read


Part 4: LPWAN & Sub-GHz IoT – LoRa, Sigfox, Mioty, DASH7, and Proprietary Bands
When we think of IoT at city-scale, agriculture fields, utility grids, or industrial campuses, we need networks that can connect devices spread over kilometers while still keeping power consumption ultra-low. This is where LPWAN (Low Power Wide Area Networks) and sub-GHz technologies shine. They fill the gap between short-range protocols (BLE, ZigBee, Wi-Fi) and cellular IoT (NB-IoT, LTE-M, 5G) by offering: Long-range coverage (1–15 km, sometimes more). Ultra-low power (batte
Eurth Engineering
Oct 31, 20255 min read


Part 2: Cellular & Satellite IoT – From NB-IoT to 5G and Beyond
In the previous article, we explored the big picture of IoT communication technologies. We saw that IoT is inherently multi-protocol, with each technology optimized for a unique balance of range, power, bandwidth, and cost. In this part, we zoom in on one of the most critical pillars of IoT: cellular and satellite networks. These technologies deliver nationwide and global connectivity, allowing IoT devices to connect across cities, countries, and oceans — something short-rang
Eurth Engineering
Oct 31, 20255 min read


Part 1: The Big Picture – IoT Communication Technologies Landscape
IoT (Internet of Things) is not just about smart sensors and connected devices. At its core, IoT is about communication — how billions of devices exchange data reliably, securely, and efficiently. Without the right communication technology, IoT is just “things” without the “internet.” But here’s the challenge: there is no single best protocol for IoT. Instead, we have a broad landscape of technologies — each with its own strengths, weaknesses, and use cases. From short-range
Eurth Engineering
Oct 31, 20254 min read


Understanding the Three Releases of 5G Technology: Solutions for Addressing Industry Challenges
The rollout of 5G technology is set to revolutionise the way we use and interact with mobile networks. Unlike its predecessors, 5G promises faster data speeds, lower latency, and improved reliability, opening up a world of possibilities for businesses and consumers alike. However, 5G technology is being rolled out in three different releases, each with its own set of features and capabilities. In this blog post, we'll explore the differences between the three releases and how
Srihari Maddula
May 2, 20233 min read


Challenges and Opportunities in the World of Big Data, AI, Smart Machines, IoT, 5G, and Robotics
Software testing has always been a cornerstone of the software development life cycle (SDLC). But with the emergence of disruptive technologies such as Big Data, Artificial Intelligence (AI), Smart Machines, IoT, 5G, and Robotics, the scope and complexity of testing have evolved dramatically. Today, testing is no longer just about verifying code—it’s about ensuring the resilience, scalability, and intelligence of AI-powered embedded systems, IoT-based infrastructures, and dig
Srihari Maddula
Apr 15, 20233 min read


5G- The future is fast, and it's here
The fifth generation of wireless technology (5G) is more than just faster internet — it’s a catalyst for the next era of digital transformation for infrastructure, smart cities, and IoT-powered innovation. What once seemed futuristic is now becoming reality as AI, embedded systems, and geospatial engineering services converge to create a hyper-connected world. This blog explores how 5G will reshape everyday life, fuel industrial growth, and enable AI-powered smart infrastruct
Srihari Maddula
Apr 15, 20233 min read


Do myths about 5G contain a grain of truth?
#5Ginsimpleterms- 5G, or the fifth generation of wireless technology, represents a major leap forward in the world of digital transformation for infrastructure and smart city technology. It is the most advanced form of wireless communication — designed to be faster, more reliable, and capable of supporting a massive number of devices, from smartphones to IoT-enabled embedded systems. 5G is expected to revolutionize IoT product engineering and smart infrastructure solutions, e
Srihari Maddula
Apr 15, 20232 min read
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