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Ultra-Low-Power BLE MCU Comparison: DA14531 vs nRF52 vs ESP32-C3 for Battery-Powered Wearables in 2026
The MCU selection meeting for a new battery-powered BLE wearable tends to follow a predictable pattern: someone proposes the chip the team already has experience with, someone else pulls up a deep-sleep current figure from a datasheet, and the decision gets made on incomplete information because a genuinely thorough comparison — across deep sleep current, active RX/TX current, peripheral set, toolchain maturity, and real sourcing availability — takes longer than the meeting h
Srihari Maddula
Aug 237 min read


Designing a Battery-Powered BLE Medical Wearable: How We Hit 39 Days on a Coin-Sized Battery
A medical adherence wearable — a device that clips onto a bottle or sits on a patient's hand to detect and log a specific medication-use gesture — sounds, on paper, like a simple embedded project: an accelerometer, a Bluetooth radio, a battery. The first power budget spreadsheet we built for exactly this kind of device came back at 4 days of battery life on a 250mAh cell, against a target of six weeks. Getting from 4 days to 39 wasn't one clever trick — it was a systematic pa
Srihari Maddula
Aug 238 min read


What Precision Medicine Needs from Hardware That Silicon Valley Isn’t Building
The Algorithm Has Arrived. The Hardware Has Not. Precision medicine — the discipline of tailoring clinical decisions, treatments, and preventive interventions to the individual characteristics of each patient — has been one of the most heavily funded and intensely discussed areas of healthcare innovation over the past decade. The computational infrastructure is maturing rapidly. Genomic sequencing costs have fallen by orders of magnitude. Biomedical knowledge graphs integrati
Srihari Maddula
Apr 1918 min read


Why Safety Standards Decide Whether a Product Succeeds — Not Just Whether It Works
In product engineering, performance gets attention. Safety gets approvals. A prototype that works is great. A product that passes safety testing is what reaches the market. We see it all the time: A smart-home device works beautifully — but fails creepage/clearance spacing. A wearable is perfectly functional — but fails leakage current limits. A sensor node runs fine — but power supply isolation doesn’t meet IEC rules. A PCB is reliable — but the documentation pack for CE mar
Srihari Maddula
Nov 12, 20253 min read


Why Medical & Healthcare Devices Fail Certification — And How Smart Engineering Teams Avoid It Using Free Tools
If you’ve ever built a medical or wellness device — a wearable ECG, patient monitor, insulin pump, point-of-care analyzer, or even a Bluetooth thermometer — you already know this truth: Building the product is hard. Certifying it is harder. Once you enter compliance, you’re suddenly surrounded by intimidating acronyms: IEC 60601, IEC 62304, ISO 13485, ISO 14971, FDA 510(k), UL 2900, and more. Even brilliant engineering teams stall because certification demands more than tech
Srihari Maddula
Nov 11, 20254 min read


Part 3: Short-Range Wireless IoT – BLE, ZigBee, Wi-Fi, UWB, NFC, and More
When most people imagine IoT, they think about smartwatches talking to smartphones, smart bulbs controlled by apps, or industrial sensors inside factories. These are not powered by satellites or LPWAN — they are powered by short-range wireless technologies. Short-range protocols dominate in homes, hospitals, offices, factories, and retail environments, where devices are typically within a few centimeters to a few hundred meters of each other. In this article, we’ll dive into
Eurth Engineering
Oct 31, 20255 min read


From Cloud to Edge: Maximizing Performance and Efficiency in Wearable IoT Devices
In today’s era of smart infrastructure solutions and IoT product engineering, wearable devices play a pivotal role in embedded systems development and digital transformation for infrastructure. From smart health monitoring to industrial IoT applications, wearables equipped with advanced 9 Degrees of Freedom (9DOF) sensors like the MPU9250 enable precise motion and orientation tracking. However, the common approach of uploading such sensor data to the cloud for processing intr
Srihari Maddula
Jun 12, 20233 min read


Revolutionizing Healthcare: Top 5 AI Use Cases for Enhancing Patient Care and Hospital Efficiency
Artificial Intelligence (AI) has brought about revolutionary changes in the healthcare industry. With its ability to analyze vast amounts of data quickly and accurately, AI-powered embedded systems and AI engineering solutions are now enabling next-generation medical applications. These technologies are at the forefront of digital transformation for infrastructure in healthcare — improving patient care, enhancing operational efficiency, and laying the foundation for AI for sm
Srihari Maddula
May 2, 20233 min read


The Inevitable Presence of AI: Why the Pharma Industry Must Embrace It
Artificial Intelligence (AI) has been transforming various industries by enhancing productivity, efficiency, and accuracy. One such sector that has been relatively slow to adopt AI is the pharmaceutical industry. However, it is now high time for pharma companies to recognize the transformative potential of AI engineering solutions and integrate them into research, development, and manufacturing workflows to accelerate innovation and improve outcomes. This blog explores why AI
Srihari Maddula
May 2, 20233 min read


The Revolutionary Effect of AI on Healthcare Organizations
The healthcare industry is undergoing a remarkable transformation, driven by the power of Artificial Intelligence (AI) and smart infrastructure solutions. As hospitals, clinics, and research facilities continue to adopt AI-powered embedded systems, IoT product engineering, and digital transformation for infrastructure, healthcare is becoming more efficient, cost-effective, and patient-centric. AI is not just enhancing diagnostics — it’s redefining how healthcare data is colle
Srihari Maddula
Apr 15, 20233 min read
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