- Developing CANopen-based sensors such as GPS, photo-diode and IMU sensor- Developed CAN device driver for TI TM4C1290 based sensors- Designed and developed customized 1-Wire protocol between AVR passive sensors and ARM based active sensors- Developed Bootloader software and firmware programmer communicated by CAN, Bluetooth or serial port

- Developed software for the control of drone- Developed Embedded Linux with Yocto project and ROS (Robot Operating System)- Implemented data gathering from GPS and IMU modules- Implemented the control of PWM input/output and GPIO using Arduino

- Managed team of developers for remote monitoring system for electric vehicles and power supplies, and designed the system.- Implemented secure socket layer communication using openssl library and self-signed certificate.- Configured openSSH or openVPN to access remote devices with private IP addresses.- Developed Web GUI and charts to show the collected data to the users in real time.- Developed data gathering system using modbus RTU/TCP on linux through 3G network.Accomplishments- Reduced the amount of network traffic in half to transmit the information from equipments to management server.- Provided critical fault notification to operator using nagios. It is used to fix the problem in time.- Applied this monitoring system to a demonstration site and a commercial site.

- Involved WLAN switch development on embedded linux. Its purpose was for providing WIFI network in tourist resort.- Developed CISCO-like command line interface(CLI) to configure WLAN switch functions.- Implemented firmware upgrade function through web interface and CLI.- Documented WLAN switch user manual and tested the system functions.- Established OpenWRT development environment (ARM CPU).Accomplishment- Fixed memory leak running out of memory in about 3 days after boot. It was very critical problem to delay the product launch.

- Made a new project about electric vehicle charged by inductive way from road with my boss and colleagues writing project proposals. It was a big project supported by the Korean government.- Designed and developed platoon control for electric vehicles through wireless ad-hoc network.- Developed status viewer of electric vehicles to show the information to developers and users.Accomplishments- Played an important role to get Korean government funding of 25 million dollar, documenting project proposal and developing platoon control for electric vehicles.- Filed 17 patents about wireless charging and smart communication for the vehicles.