1. RPi GPS + 4G LTE-M HAT
RPi GPS + 4G LTE-M HAT is a custom hardware prototype designed and built to extend Raspberry Pi with cellular connectivity and high-accuracy multi-constellation GNSS support. The HAT directly interfaces with the Raspberry Pi through standard headers, enabling plug-and-play deployment for tracking, telemetry, and remote IoT applications.
The board supports 4G LTE-M and GSM bands for reliable wide-area communication, making it suitable for low-power and remote deployments. It integrates a multi-GNSS receiver supporting GPS, BDS, Galileo, QZSS, and IRNSS/NavIC for improved positioning accuracy and regional coverage, including India-specific navigation requirements.
An onboard SD card slot is provided for long-term local data storage, allowing GPS logs and system data to be recorded even during network outages. The prototype was validated with Raspberry Pi for real-time location acquisition, data logging, and cellular data transmission, making it suitable for applications such as asset tracking, fleet monitoring, and remote sensing systems.
2. I2Connect Board
The I2Connect Board is a custom hardware module designed and built to simplify sensor integration in embedded and IoT systems. It converts a wide range of analog and non-I2C sensors into a standardized I2C output, allowing seamless connection to microcontrollers and single-board computers.
The board supports universal sensor compatibility through configurable addressing and scaling, enabling multiple sensors to coexist on the same I2C bus without conflict. Its architecture allows sensor-specific calibration and output normalization, making it suitable for rapid prototyping as well as production-ready designs.
A key design goal of I2Connect was extreme cost optimization. With a bill of materials of approximately $2, the board delivers a flexible and scalable alternative to multiple sensor-specific interface circuits. To the best of my knowledge, no equivalent off-the-shelf solution currently exists that offers this combination of universality, configurability, and cost efficiency.
3. xLoRa Microcontroller Board
The xLoRa Microcontroller Board is a custom-designed embedded hardware platform developed to address the need for a single, compact system supporting both short-range and long-range wireless communication. The board integrates Wi-Fi and Bluetooth for local connectivity and configuration, along with LoRaWAN for long-range, low-power wide-area communication.
To support autonomous and remote deployments, xLoRa features a flexible power architecture with battery operation, USB power, and renewable energy input through a solar interface. The power subsystem is designed to enable energy-aware operation, making the platform suitable for off-grid IoT applications.
xLoRa was conceived as a unified solution where multiple communication technologies and power options coexist on a single board, eliminating the need for separate modules and complex interconnections. Based on a survey of existing research literature and commercially available development boards, no equivalent platform was found that combines Wi-Fi, Bluetooth, LoRaWAN, and renewable energy support in a single integrated design.
The board is intended for applications such as smart agriculture, environmental monitoring, remote sensing, and experimental research in hybrid IoT networks.
4. HomeSentinel
HomeSentinel is a compact, integrated safety and comfort monitoring device developed as a funded project by NoToFire Private Limited. The system consolidates multiple critical sensors into a single unit to provide continuous monitoring of safety and environmental conditions within residential spaces.
The device enables real-time data access and alerting through Wi-Fi and Bluetooth connectivity, allowing users to receive instant notifications on connected applications and local interfaces. To ensure uninterrupted protection, HomeSentinel supports multiple power configurations, including 5V and 24V wired inputs as well as battery-powered operation.
In addition to remote alerts, the system incorporates visual and audio notification mechanisms to provide immediate on-site warnings during critical events. The compact form factor and multi-sensor integration reduce installation complexity while improving reliability compared to deploying multiple standalone devices.
HomeSentinel is designed for applications in home safety, fire prevention, and smart living environments, offering a scalable and robust solution for continuous monitoring and early warning systems.
5. NeuroVibe-TN: Wearable Vibrotactile Neurostimulation Device for Trigeminal Neuralgia
NeuroVibe-TN is a compact, non-invasive vibrotactile neurostimulation device developed to address Trigeminal Neuralgia, a chronic pain disorder characterized by sudden, severe, electric shock-like facial pain often triggered by routine daily activities. Existing treatment options primarily rely on long-term medication or invasive surgical interventions, which are associated with significant side effects, high costs, and procedural risks.
The device delivers controlled vibrotactile stimulation—conveying sensory input through precisely modulated vibrations—to targeted facial regions as an alternative neuromodulation approach. Multiple vibration motors are individually controlled, enabling flexible stimulation patterns tailored to patient-specific pain profiles.
NeuroVibe-TN is built around one of the world’s smallest ESP32-C6 microcontrollers and supports multi-protocol wireless control, including Wi-Fi, Bluetooth, Zigbee, and Thread. An Android application enables real-time configuration, intensity adjustment, and therapy session control. The system supports both USB and battery-powered operation, making it suitable for clinical as well as home-based use.
This project was developed through interdisciplinary collaboration with AIIMS Bhubaneswar and IIT Bhubaneswar and was supported by an “Idea to Prototype” grant from KIIT TBI under the DST NIDHI PRAYAS scheme. One patent has been submitted covering the device architecture and stimulation methodology.
NeuroVibe-TN represents a low-risk, cost-effective, and patient-friendly alternative aimed at reducing dependence on invasive and pharmacological treatments for chronic neuropathic pain.
6. Smart Agriculture Automation System for Soil-less Farming
The Smart Agriculture System is an advanced automation solution developed to optimize soil-less farming techniques, including hydroponic, aeroponic, and Dutch bucket cultivation systems. The prototype continuously monitors critical growth parameters such as Total Dissolved Solids (TDS), pH levels, Electrical Conductivity (EC), light intensity, and water temperature to ensure optimal growing conditions for plants.
The system leverages cloud connectivity to provide real-time data access, remote monitoring, and control from anywhere. To reduce manual intervention, it automates water and nutrient top-up processes, maintaining consistent and precise nutrient levels essential for healthy plant growth. Based on collected sensor data, the system also provides optimized parameter recommendations tailored to maximize crop health and yield.
Designed with sustainability and reliability in mind, the system supports battery and solar power options for uninterrupted operation, even during power outages. Bluetooth and LoRaWAN connectivity enable both short-range configuration and long-range communication, making the solution suitable for commercial farms and remote agricultural deployments.
Competitive Advantage
Unlike existing solutions that rely heavily on manual inspection or partial monitoring, this system offers continuous, real-time measurement of all key nutrient and environmental parameters in a single integrated platform. The combination of automated nutrient management, renewable energy support, and cloud-based remote access significantly reduces labor, minimizes human error, lowers energy consumption, and improves overall productivity. This results in healthier crops, higher yields, and a scalable, resilient smart farming solution suitable for modern agriculture.
