Android platform(Host from Qualcomm and Controller from Broadcom) Worked for Bluetooth on Android L and M and N Software module/driver development and migration for BT in Kernel Investigation and debugging BT issue from all layers, including APP, Framework, HAL and Kernel. Technical document writing, software architecture leaning and designing.

Android platform (Linux BSP Based on Spreadtrum) Worked for USB and Sensor on Android L  Software module/driver development for USB and Sensor in Kernel Investigation and debugging USB and Sensor Technical document writing, software architecture leaning and designingFirefox Platform (Linux BSP) Worked for USB on Firefox 1.0 and 2.0 and 2.1 Kernel Driver transplantation Investigation and debugging USB issue in Kernel.

 R&D elevtor control system and related products designed by MCU(STM32 AVR PIC and MSP430 ) software based on RTOS of FreeRTOS. Manage and maintain SW team  Communicate and negotiate customer for Sale Product. Do the jobs of recruiter

 Hardware and software engineer (Project: Tianjin St Regis Hotel) Develop and Upgrade Hotel Controller System software with C and ASS on 51MCU Designed and Debug Scheme and PCB of Project with AD and Hardware tools, such as oscilloscope and logic analyzer and so on. Field support on project for one year.