In-car BLE connectivity:🔹 BLE key fob & CCC digital key leveraging a multi-platform BLE framework• Helped design, develop, maintain and review a multi-platform BLE framework (TI CC26x2 & NXP KW45)• Added support for the NXP KW45 series• Conducted meetings that pertain to the overall design of the BLE framework• Made crucial design choices involving pin configuration, clock management and power efficiency• Developed middleware to manage a GATT clients' GATT databases• Implemented a GAP device manager to handle BLE pairing, bonding and manage device bond records• Crafted a keyfob button signal filtering module to distinguish between different types of button pushes (short, long, extended, stuck, double) and handle their competing priority levels• Led efforts to enhance code modularity by introducing abstraction to middleware components and hardware peripheral drivers (Uart, Spi, Timer, Adc, Crypto, Wdg)🔹 Activities• Software Requirements Specification review• Probing hardware (evaluation kit, custom boards) to investigate problems of dubious nature• Analyzing SDKs to unravel design patterns• Implementing purpose-built software modules• Performing comprehensive unit tests using VectorCAST• Authoring Doxygen documentation and UML diagrams for every developed module• Cross-review using Gerrit

Cross-platform IoT framework:• Helped design, develop and maintain a stand-alone framework for event-driven IoT applications• Added support for the Nordic nRF5 series SoCs• Integrated Nordic's BLE protocol stack firmware (Softdevice)• Developed middleware to handle BLE events, manage connections and customize advertisements• Developed full-featured drivers for upwards of 10 sensors, step-down battery chargers...• Added the framework to PlatformIO• Ensured the framework's support by the ST STM32, Atmel SAM & Nordic nRF52 PlatformIO platformsLow-cost oxygen concentrator:• Designed and developed an application to control the valves of an oxygen concentrator, capture a GPS position, collect sensor data, print it to an LCD screen and send it to ThingsBoard over GPRSCattle tracking device:• Designed and developed an application to collect sensor data and communicate with a constellation of 8 Astrocast nanosatellites• Conceptualized and implemented a sophisticated algorithm to optimize power consumption by taking advantage of Astrocast's "ephemeris" sleep/wake-up scheduleSmart Padlock:• Designed and developed a battery-powered ”padlock” security system with an authorization-only access policy that alerts users to a door being opened through LoRaWAN uplinksApprentice & intern mentoring:• Keyless BLE security system allowing for exclusive access to a critical facility• Real-time chat messaging application over BLE• Smart ambient air thermometer• BLE protocol stack & FreeRTOS interoperability on nRF51• LoRaWAN time synchronization

LoRa mesh network as an alternative to traditional LoRaWAN deployments:• Designed a transport layer for a LoRa mesh network• Put in place a dynamic Join/Leave mechanism allowing for a self-sustaining network of up to 15 nodes• Implemented a 4-layer packet transmission scheme to ensure reliable data transfer and avoid common network pitfalls (collisions, congestion, bottlenecks...)• Performed stress tests to challenge the network's reliability• Applied 3+ optimization techniques to reduce memory footprint by 8%