Asmi Gujral Portfolio

Electric Bike Motor Controller

This project is an electric bike motor controller, that was implemented using Nucleo STM32, Arduino C++, and SimpleFOC. The purpose was to drive a BLDC motor system using the DRV8301 motor driver.

It incorporates various communication protocols like SPI, to detect and rectify over-current and over-thermal errors on the motor driver.

It was created as part of the Electrium design team, for the Spring 2023 Electric bike project.

To view the code for this project, along with its functional software block diagrams, please visit the GitHub Repo below.

• GitHub Repo

Wireless GPIO Control Network - In Progress

For this project, I used the ESP32, AWS API Gateway WebSockets, React.js, and Typescript to develop an ESP32 WebSocket client in C/C++ using PlatformIO.

I am currently working on integrating the websocket client with AWS API Gateway WebSockets and AWS Lambda in order to enable real-time GPIO pin control using the cloud services, and React.js to create a control panel for browser-based control.

I am also implementing error handling mechanisms in the AWS Lambda functions to ensure reliability and fault tolerance.

To view the code for this project, along with its functional diagrams, please visit the GitHub Repo below.

• GitHub Repo

Remote Control & Monitoring System

For this project, I configured the ESP32-CAM with a PIR and a DHT11 Humidity and Temperature sensor, in sending HTTP requests to the Telegram API.

I also facilitated interrupt handling within the code, in order to detect any motion events with the PIR sensor and send pictures upon detection.

The DHT11 sensor was used to collect and transmit data, when a request for doing so is sent to the Telegram bot, with the project using Wi-Fi connectivity with the ESP32 for remote access and control.

To view the code for this project, along with its functional software and wiring diagrams, please visit the GitHub Repo below.

• GitHub Repo

Asynchronous Data Streamer

This asynchronous data streamer enables real-time data acquisition using the C, STM32, FreeRTOS, the DHT11 sensor, a potentiometer, an SD module, as well as various communication protocols like SPI, UART and ADC.

More specifically, the FreeRTOS kernel has been used to configure concurrency and varying task priority within tasks that poll each sensor for data.

Additionally, protocols including ADC channels, GPIO interrupts, and UART serial and SPI communication were used in order to facilitate data transmission to an SD card.

To view the code for this project, along with its functional software and wiring diagrams, please visit the GitHub Repo below.

• GitHub Repo

Motor Controller & Data Acquisition Subsystem - WSST

This project uses the L298N motor driver, a 24V gear motor, the MPU6050 accelerometer, an SD Module as well as an Arduino, to track and save acceleration and gyroscopic data while driving the motor.

This project is a subsystem that was created as part of the CANRGX7 submission on behalf of the Waterloo Space Soldering Team.

It uses protocols like I2C (accelerometer), SPI (SD module), and PWM (drives the motor) to run. Its planned use is to be mounted inside a centrifuge that will test soldering quality in microgravity, as part of the CANRGX7 competition in collaboration with the CSA (more details in the Experience section, under WSST).

With our current working design, I also Implemented bidirectional USART communication with the STM32 for motor control, to interface with a GUI developed using tkinter and pyserial. This helps us to control the motor speed, and whether it's on or off using the GUI, to prevent having to rebuild and reflash the code and having to hard code a PWM value.

To view the code for this project, along with its architecture diagram, please visit the GitHub Repo below.

• GitHub Repo

Weather Balloon Payload - UW Orbital

This project uses the ArduCAM OV5640, an SD Module as well as an Arduino, to take a picture and save it to the SD module.

This project is a subsystem that was created as part of the Weather Balloon Project during my time at UW Orbital (a cube satellite design team).

It uses protocols like I2C (ArduCAM), and SPI (SD module). Its planned use was to be mounted under the surface of the weather balloon, that was to be launched into the lower Earth atmosphere to take pictures while ascending of our home, the planet below (more details in the Experience section, under UW Orbital).