PRAJWAL KR

Working on a non-touch HMI firmware platform for an EV scooter, contributing from project inception through first-phase delivery, and continuing feature development.

Project: Automotive MCU-Based Non-Touch HMI System for EV Scooter.

• Built the HMI firmware platform from scratch, from architecture definition, HAL design, to first-phase product delivery, and ongoing feature development.
• Designed a HAL abstraction over the generated LLD to ensure a portable, modular, and maintainable firmware architecture.
• Developed HAL and performed peripheral bring-up for DAC, DMA, GLCDC, GPT, ICU, UART, and IWDT.
• Implemented IAL, service layers for Timer, and UART services, creating reusable and portable APIs.
• Developed JSON parser and AT command parser to support connectivity modules.
• Built HMI application logic to: consume CAN application data, perform screen-based decision making, control UI state transitions, handle joystick-based user interaction, and bridge firmware with the Qt for MCUs graphics stack.
• Designed a task-aware watchdog mechanism to monitor system health, avoid false resets, and log failure context into eMMC (NAND) for post-failure diagnostics.
• Technology Stack: FreeRTOS.|Renesas MCU.| Qt for MCUs |

Project: Industrial IoT Condition Monitoring Edge Device.

• Developed FreeRTOS-based firmware for IoT and industrial edge devices, focused on Condition-Based Monitoring (CBM).
• Worked on motion sensors (accelerometer, magnetometer, temperature, ultrasound) for machine health monitoring.
• Implemented circular flash memory logic for wear leveling and configuration storage.
• Developed JSON parsing modules for structured cloud data transmission.
• Integrated Wi-Fi modules (ISM43362_M3G_L44, INP1041-A1) over SPI, and implemented MQTT-based cloud communication.

Project: High-Reliability Wired MODBUS Data Gateway.

• Built MODBUS master gateway solutions that communicate with multiple RS485 devices.
• Designed MODBUS client functionality for IoT devices, enabling local industrial communication.

Designed firmware test plans, and performed unit, system, and regression testing.

Supported on-field debugging and firmware issue analysis.

• Improved product quality and performance through root cause analysis, corrective action, and customer performance reviews.
• Handled customer complaints and provided service.
• Conducted internal QA auditing to identify deviations, and informed line Quality Assurance.
• Provided training to operators regarding customer complaints and internal rejections.