Over the last year, I’ve worked with EV chargers. This has different power output ratings 3.5KW(Single Phase), 7KW(Single Phase), 11KW(three Phase), and 22KW(three Phase) chargers with multiple connectors. This allows Electric Vehicle (EV) owners to charge their cars through single and 3-phase power outlets.

  I was the sole Senior Firmware Developer in R&D Team. Collaborate with team members, including hardware designers, to identify software related requirements and develop corresponding software design strategies.

Tasks included:

• Specifying, Developing, and Troubleshooting OCPP Application Layer which is hardware independent.
• Designed and implemented the Bootloader concept to enable FOTA(Firmware Over The Air).
• Developing API's to integrate Ethernet, LTE, WiFi and RFID.
• Designing program architecture based on project requirements and hardware specifications.
• Supporting team members and supervising junior-level developers.
• Maintain and improve existing designs and source code to help attain the goal of a modular structure.

Highlights:

• OCPP 1.6 protocol is completely developed on my own.

  Having working experience in LoRaWAN. LoRa is a spread spectrum modulation technique. It is a long-range, low power wireless platform that has become the de facto wireless platform of the Internet of Things (IoT).

  LoRa is the physical (PHY) silicon layer, or wireless modulation, used to create the long-range communication link.

Tasks included:

• Developing and Troubleshooting APIs to integrate sensors with LoRaWAN.
• Understanding the design document and working flow of Lora and modifying the program as per the client's requirements.
• Implementing Low Power to enable long-life battery-operated devices.
• As per the requirements, Addressing the different needs reflected in the wide range of applications.

Projects that I have done using LoRa:

• Smart Water Meter.
• Gas Meter.
• Occupancy Sensor Module.
• Solar Plant Monitoring System.
• Solar Street Lights.
• Water Level Monitoring System.

   Familiar with Linux Platform.I use the Raspberry Pi and Beaglebone green to learn programming skills, build hardware projects, do home automation and developing Linux device driver

  Having good understanding on linux operating system internals, Multi threading, IPC.

• Configured Raspberry pi as a independent mini Wireless router using LTE module.

  Having In-depth working experience In Real Time Operating System. Free RTOS stack provides a scheduler and with it multi-threading primitives including threads, mutexes, semaphores, and thread-safe heap allocation methods.

  Familiar with Inter-process communications, Scheduler, Context Switching, and Multitasking.

Tasks included:

• Importing and Integrating FreeRTOS stack for the specified Microcontroller.
• Designing program architecture based on project requirements, and developing a driver code for the particular peripherals.
• Writing software code for creating tasks and handling Application code as per requirements.
• Analyzing and enhancing efficiency, stability, and scalability of Embedded Code.

Projects that I have completed using FreeRTOS:

• Vehicle Tracking System.
• Occupancy Sensor Module.

  IoT is one of the most important technologies of everyday life, and it will continue to pick up steam as more businesses realize the potential of connected devices to keep them competitive.

  Protocols allow nodes to have a structured way to interact between them. Since the needs and use cases of IoT devices have quickly evolved over the last few years, so have the protocols.

Some of the below IoT Wireless communication protocols that I familiar:

• Bluetooth.
• LoRaWAN.
• Near field communications (NFC).
• Wi-Fi.

Some of the below IoT Networking protocols that I familiar:

• Message Queue Telemetry Transport (MQTT).
• Transmission Control Protocol (TCP).
• User Datagram Protocol (UDP).
• WebSocket.
• Internet Protocol (IP).
• Ethernet.

  I have worked for over six months in Thermal Printer to deliver a complete product. The printer has the ability to print images, text, and barcodes. It has the ability to get data from either USB via Laptop or UART via mobile Application.

Tasks included:

• Developing and Testing Firmware APIs to integrate Printer Head and WiFi Module
• Developing Driver API for Stepper Motor Driver IC.
• Implemented Ring Buffer Concept in MCU to Handle more then 100KB continuous data from ESP via UART.
• Continuously monitoring Voltage using a resistance voltage divider and Current using a Current Sensing resister.
• Integrated USB driver to enable USB for Thermal Printer.
• Closely worked with hardware designers, to identify software-related requirements and develop corresponding software design strategies.

Highlights:

• Thermal Printer is completely developed on my own.