Sabrina Le - SENIOR EMBEDDED

Sabrina Le

4.9

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Sabrina Le

4.9

Age

Gender

Male

Address

Ha Noi, Viet Nam

Language

Vietnamese - Native

English - Advanced

Main expertise

Embedded Software Firmware Linux C C++IoT Python AWS Qt Raspberry Pi RTOS CSS

Introduction

Sabrina Le possesses over 6 years of dedicated experience in Linux kernel and Firmware C development, with a specialization in IoT and RTOS bare metal systems. She is proficient in various aspects of the Linux kernel, including memory management, scheduling, and the virtual file system. Sabrina is skilled in developing firmware for IoT devices and is passionate about enhancing Linux kernel features, modules, and device drivers to optimize performance. She has strong problem-solving skills and is committed to staying updated with the latest technological trends. Sabrina also has excellent communication skills in English, with experience in both client-facing and internal communication, both written and verbal. She is enthusiastic, hard-working, and responsible, with the ability to work independently and remain calm under pressure.

Project list

Ford US Entertainment Hardware System Testing - US

2023

This project focused on testing the entertainment hardware system on the BSP. It involved building source code using AOSP and QNX as per Ford's system and developing test cases for BSP with the BTS Test and slash Framework platform.

Understand the structure of Ford's entertainment hardware system on the BSP. Build source code AOSP and QNX following the Ford system. Develop the Framework BTS Test and slash Framework using Qualcomm chip. Discuss features and test BSP Ford with customers. Port test cases from the VTS Framework to the BTS Framework. Design the HLD BTS Framework documentation and contribute to Ford wiki. Develop API features for the Framework BTS Test and slash Framework. Develop test cases for BSP with BTS Test and slash Framework, covering elements like SPI, I2C, PCI, Filesystem, Audio card, Reset System, and Log bootup QNX.

Technologies: Embedded Linux: QNX and AOS 80xx with Qualcomm, Understand the log system of QNX and Android of the ford system, Language: Python script, shell script, C, Hardware: Phoenix, SYNC4

Development of Mesh WiFi Products with Qualcomm Chip

2022 - 2023

This project focuses on the development of Mesh WiFi (AC and AX) products using Qualcomm chips. It involves creating high-level and low-level design documents for the WiFi Mesh and planning firmware development. The project includes porting a library for the Zigbee EFR32MG module, editing device trees for SPI modules, developing features for WiFi Mesh, and integrating WebGUI modules on Qualcomm chips. Additional tasks involve porting utilities in OpenWRT, developing WAN, LAN, and topology web GUIs, debugging and testing firmware, modifying device trees for hardware interfaces, and debugging kernel software and hardware.

Design document HLD and LLD of Wifi Mesh and plan scheduler development firmware. Development of firmware by porting the Zigbee EFR32MG module library into the source code of the Qualcomm chip. Edit the device tree for SPI on the Zigbee module. Develop features for Wifi Mesh. Port the WebGUI module: Luci WebEnable module feature on the Qualcomm chip's busybox. Port utilities in OpenWRT for devices. Port the iwinfo module to pass 80211AC hwmode to Luci. Develop WAN, LAN, and topology web GUI in Mesh devices. Repair the SSH profile of the Qualcomm chip and fix LED and button (WPS) issues on the Qualcomm reference board. Debug and test firmware using QEMU for the WebConfig IPCAM product with the Melatek chip. Edit the device tree SPI and GPIO in JetSon Nvidia hardware. Modify camera thread management with IPC/Linux Kernel. Build and update the source code of WebGUI for Melatek. Adjust the device tree for buzzers and LED alarms. Debug kernel software tools and address hardware debugging.

Technologies: Embedded Linux: IPQ40xx and IPQ 80xx with Qualcomm, C/C++, WebGUI Config (Luci web, Javascript, Ajax, HTML, CSS), MCU: Infineon TCxx, Tool: Treosos, can vector: can test, canoe, analyzer, canape..., Debugging tool: KGDB. GDB, Coredump, Varglin, Strace / Ltrace., Yocto builds QEMU test, OpenWRT Framework.

LTE Router Firmware Development

2021 - 2022

This project involves the development of firmware for an LTE router. The objective is to introduce new features such as a phonebook and WebGUI backup and restore functionalities. A primary aim is to maintain the source code for webCGI.

Maintain the source code for webCGI. Understand the flow of source code for the Broadcom chip SDK.

Technologies: Embedded Linux: IPQ95xx with Qualcomm, Language: C/C++, WebGUI Config (Luci web, Javascript, ajax, HTML, CSS), Protocol: TCP/IP, Netlink socket, Debugging tool: KGDB. GDB, Coredump, Varglin, Strace / Ltrace., Yocto builds QEMU test, OpenWRT Framework.

Firmware Development for Mesh Access Points

2020 - 2021

This project focuses on the development and enhancement of firmware for Mesh Access Points (APs). The primary goals include modifying the WLAN device tree, understanding the OpenWRT flow, and porting WebGUI and shell scripts for network configuration in mesh devices. Additional tasks involve porting the iwinfo module to support 802.11ac for luci, adding makefile support for the iwconfig package, and managing PCI, serial, and ethernet aliases. The project also aims to deepen the understanding of Hostapd and Supplicant packages, develop advanced WebGUI features like HomeWifi, WiFi SSID, DDNS, and IPv4/IPv6, as well as fixing bugs in the UMP for mesh devices. Furthermore, it includes fixing a network driver bug in Qualcomm chips related to the WPS button, supporting firmware testing, and understanding the network driver flow in Qualcomm hardware.

Using the command to write kernel and root file system in NAND and boot kernel rootfs. Modify the device tree for WLAN. Understand OpenWRT flow and port WebGUI in mesh devices. Configure and port shell scripts for network settings in devices. Port the iwinfo module to pass 80211AC hwmode to luci. Add makefile support for the 802.11ac in the iwconfig package. Add aliases for PCI, serial0, and ethernet and remove all peripheral differences. Understand and work with Hostapd and Supplicant packages in mesh devices. Develop WebGUI and introduce new features like HomeWifi, WiFi SSID, DDNS, Port Forwarding, and more. Fix bugs in the UMP for mesh devices. Resolve device driver issues in Linux for Qualcomm chips, specifically the WPS button with ioctl network drive. Support testing of firmware for Mesh AP. Understand network driver flow in Qualcomm chips.

Smart Home Management Device

2019 - 2020

This project involved building a smart home management device designed to display various environmental and sensor data through web services utilizing NodeJS. The device integrates multiple sensors, including SRF05, temperature, humidity, MQ5, and MQ2. It also facilitates data transmission and parsing from cloud services like Temboo and AWS.

Analysis and design Development Bug Fixing

Technologies: Board: Raspberry pi 2 and ESP8266, Sensor: Temp, Humd, Microsoft Studio, Pycharm IDE, Google Cloud, AWS Temboo Platform

Self-Driving RC Car Using Raspberry Pi 3 and Odroid-XU4 Board

2018 - 2019

This project involves building a model of a self-driving bus designed to pick up passengers at four different points. The vehicle navigates two predetermined paths within a building. It also processes feedback from five simulated scenarios. The project includes establishing a streaming server-client setup between a PC running Ubuntu and a Raspberry Pi 3.

Analysis and design Development Test code

Technologies: Python with Pycharm, OpenCV3 and Arduino IDE

Smart IoT Management System

2017 - 2018

The project involves analyzing the reference manual of NXP (S32K), preparing a to-do list for testing modules, and coding and debugging NXP modules.

Analyze the reference manual of NXP (S32K) Prepare a to-do list for testing NXP modules Code and debug NXP modules

Technologies: Protocol: SPI, I2C, QuadSPI, SDK: IAR Tool, Eclipse, Language: C.

Project list

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