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Hello! I'm Patrick Cohen, a driven individual with years of hands-on hardware and software experience gained by working on embedded systems, IoT, and data analytics projects. I have worked with different microcontrollers, circuitry, and various modules. I have worked on projects that have included parts such as: Microcontrollers: - Esp32 (WiFi, BLE, IoT Cloud Services Integration) - NRF Nordic Semiconductor - Esp8266 (WiFi, IoT) - Arduino (Uno, Mega, Nano, Micro, Nano 33 BLE) Microcomputers: -Raspberry Pi -Jetson Nano -Jetson Xavier NX Additional Modules: -Adafruit RFM95W LoRa Radio Transceiver Breakout -HC-05 Bluetooth module -SH-HC-08 Bluetooth Low Energy module -GSM Cellular Module -NRF24L01 Wireless Transceiver -Ultrasonic sensor (Detect distance) -LM35 Temperature Sensor -RFID Wireless Card -Relay modules -Servos -DC Motors I have also worked on projects that contain the following functionalities: -Android application development to control Arduino circuit via Bluetooth and WiFi. -Analog circuits to control the level of power through the motor. -HBridge motor driver for opposite motor polarity (clockwise and counterclockwise rotation). -Solar-powered microcontroller projects that have implemented deep sleep code for prolonged operation.

I am an Electrical/Embedded Firmware Engineer with 9 years of experience specializing in developing robust firmware solutions. My work encompasses a wide range of projects, where I have successfully contributed to enhancing product features and functionality. I excel in problem-solving and practical thinking, always aiming to deliver high-quality results that align with client objectives. My expertise spans various industries, allowing me to adapt quickly and bring a fresh perspective to every project. If you are looking for a skilled engineer who can translate complex requirements into effective firmware solutions, let's connect and discuss how I can add value to your team.

I am a full stack Mechatronics, Embedded Systems, and Hardware Integration Engineer with extensive experience designing and building complex electronic, and IoT systems. I help clients at every stage of development from system architecture and prototyping to full scale production delivering reliable, high quality solutions on time and within budget. My experience includes working with a wide range of microcontrollers and embedded platforms, including ESP32, nRF52, STM32, Teensy, Arduino, BeaglePlay, dSPACE, and NVIDIA Jetson. I specialize in control algorithm development, testing and validation, and hardware-software integration, with strong experience building engineering user interfaces using LabVIEW and dSPACE ControlDesk. In addition to embedded firmware and hardware, I design and develop desktop and mobile applications used for device control, configuration, testing, and data visualization. I build cross-platform mobile apps using Flutter, native iOS apps using Swift, and desktop applications using Python, C#, LabVIEW, and MATLAB ensuring seamless integration between hardware, firmware, and software. Skills Summary - Programming Languages C, C++, C#, Python, Assembly, Swift, Dart (Flutter) - Embedded & Firmware Development ESP32, nRF52, STM32, Teensy, Arduino, XMEGA ADC, DAC, I2C, SPI, UART, CAN, DMA, RTOS, PWM, Encoders, IRQ, RTC - PCB Design Altium Designer, KiCad, Proteus - Software & Engineering Tools MATLAB/Simulink, LabVIEW, OpenModelica, STM32CubeIDE, Keil, Linux, Julia, Processing - Mobile & Desktop Applications Flutter (Android & iOS), Swift (iOS), Python, C#, LabVIEW - Modeling & Control Optimization, System Identification, Dynamic Simulation, Data Analysis & Visualization - Embedded Boards & DAQ Systems BeaglePlay, Raspberry Pi, NI DAQs, dSPACE/ControlDesk - IoT Systems IoT cloud platforms, databases, IoMT devices, web dashboards - Communication Protocols RS232, RS485, Modbus, CAN, SSI, Ethernet - Electronics & Sensors IMUs, medical sensors, environmental sensors, motor drivers, power management ICs, GPS, GSM, Bluetooth, RF modules, USB Host ICs - Industrial Automation PLCs, motor drives (VFDs, servo drives), encoders, load cells, flowmeters, conveyors, industrial power systems - CAD & Prototyping Fusion 360, SMD soldering, oscilloscopes, logic analyzers, laser cutting, 3D printing I have a proven track record of applying these technologies to improve system performance, increase efficiency, and reduce overall cost. If you’re looking for an engineering partner who can handle PCB design, firmware development, and the desktop or mobile app that controls your device, I’m here to help. Let’s connect and discuss how I can support your project. Thanks so much for taking the time to read my introduction.

Looking for challenging new projects which can effectively use my talents and creativity, to generate cost effective software solutions. I'm a world class C programmer (primarily on Unix/Linux) and I'm used to making "impossible" tasks "possible". I have a great deal of expertise in: * real time embedded systems * cross compilation/software construction * source control * network programming * system administration * kernel level programming/device drivers * image processing * performance and metrics

AI can move a project forward fast. It can also create architecture nobody trusts, firmware that almost works, security holes no one noticed, ML models that don’t survive real data, and prototypes that fail the moment they touch real hardware. That is where I create the most value. I help founders, inventors, and technical teams use AI aggressively without letting AI-generated mistakes turn into expensive engineering debt. If you are already using ChatGPT, Claude, Cursor, Codex, Replit, Lovable, or other AI tools, but your project is getting stuck because the output is brittle, insecure, poorly specified, hard to validate, or disconnected from real-world constraints, I can help. Think of me as an AI engineering whisperer: someone who understands both the power of AI and the engineering realities that AI often misses. My strongest fit is not commodity implementation. If your project is fully specified and just needs code written, there are many lower-cost options on Upwork. My value is highest when the system is ambiguous, partially built, AI-generated, technically risky, or crossing the boundary between software, hardware, firmware, data, ML, and operations. I help answer questions like: ▸ Is this AI-generated architecture actually safe to build on? ▸ Will this prototype survive real users, real hardware, real timing, and real edge cases? ▸ Are there hidden security, reliability, integration, or model-validation risks? ▸ What should be rebuilt, what should be kept, and what should be tested first? ▸ How do we turn a promising AI-assisted prototype into a real engineering system? MY WORK TYPICALLY FALLS INTO FOUR AREAS: AI ENGINEERING RESCUE ▸ Review AI-generated code, architecture, workflows, and product plans ▸ Identify brittle assumptions, missing tests, security gaps, and failure modes ▸ Turn prototype chaos into a coherent technical path REAL-WORLD SYSTEM ARCHITECTURE ▸ Design systems that work beyond the demo ▸ Bridge AI, software, hardware, firmware, sensors, wireless links, and operations ▸ Translate unclear product ideas into buildable technical specifications APPLIED ML & DECISION SYSTEMS ▸ Build and validate machine-learning models for noisy, real-world decision environments ▸ Work with time-series data, feature engineering, model evaluation, and out-of-sample testing ▸ Identify leakage, overfitting, regime-change problems, and weak validation methods ▸ Develop ML systems where bad assumptions create real financial or operational consequences EMBEDDED, IOT & HARDWARE-AWARE DEVELOPMENT ▸ Firmware, PCB, sensor, wireless, and real-time system review ▸ STM32, ESP32, Raspberry Pi, BLE, cellular, IoT, industrial, and prototype systems ▸ Debug issues where software assumptions collide with hardware reality I have taken numerous products from concept to production, including embedded systems, IoT devices, industrial controls, data systems, automation tools, and AI-enabled workflows. I also build applied ML models for noisy, high-stakes decision environments, including financial market models that I use in my own trading. That work demands strict leakage control, disciplined feature engineering, out-of-sample validation, model-failure analysis, and constant attention to whether a signal is real or just noise. My background includes MSEE-level engineering training, decades of hands-on product development, and extensive practical use of LLMs, agentic AI workflows, and applied machine learning. Most AI consultants do not understand hardware. Most hardware engineers underuse AI. Most ML prototypes are not tested hard enough against real-world failure modes. I bridge those gaps. Best fit for: ▸ Founders building AI-assisted products ▸ Teams with prototypes that work in demos but not in the real world ▸ Companies using AI-generated code and needing review, hardening, or architecture cleanup ▸ Teams building ML, forecasting, automation, or decision-support systems ▸ Embedded, IoT, robotics, sensor, wireless, or firmware projects where AI alone is not enough ▸ Inventors who need a senior technical reality check before spending serious money The value I bring is practical technical judgment. I help you move faster without fooling yourself. A short review can often prevent weeks or months of wrong-direction development. Relevant technical areas: Embedded systems • AI/ML systems • LLM workflows • Agentic AI • System architecture • Applied machine learning • Time-series modeling • Forecasting • IoT • Firmware • PCB design • STM32 • ESP32 • Raspberry Pi • BLE • Cellular IoT • Real-time systems • Sensors • Wireless systems • Product development • Prototyping • Manufacturing readiness • Security review • Automation • Data pipelines • Python • C/C++

Embedded systems and hardware engineer specializing in firmware development, PCB design, and wireless device development. I help companies design, debug, and bring embedded products to market. My work spans microcontrollers, embedded Linux systems, BLE/Wi-Fi devices, and full hardware/software integration. I have contributed to production devices including medical electronics, wireless products, and embedded sensor systems. Typical work includes: • Embedded firmware development (C/C++) • Embedded Linux development • PCB design and hardware architecture • BLE and wireless device integration • Hardware/software system debugging • Prototyping and product development Technologies I frequently work with include ESP32, STM32, RP2040, Nordic platforms, and Arduino-based systems, along with tools such as FreeRTOS, KiCad, and Python-based test tooling. Languages: C, C++, Python, MATLAB Protocols: I2C, SPI, UART, I2S, BLE, Wi-Fi