Develop SECC(V2G Communication, DIN70121, ISO 15118-2/-3/-20) SW(Linux platform) including Plug&Charge(using OpenSSL v3.x)

Develop embedded software for the cow milking machine. Using STM32 controls PWM/ADC/GPIOs through UART, CAN or MQTT(over TCP)

Develop voice assistant(for pedestrian signal) SW -. Using STM32F4, FreeRTOS, LwIP(network), and MbedTLS-. Implement whole SW from the scratch, User command shell interface, Menu and Flash NVM, GPS, RS232/485, https(using MbedTLS) client, and TCP socket server (comm for client devices)-. Implement device management windows app (C#, through UART)

(2017.12 ~ 2021.04) Develop EVCC (Electric Vehicle Communication Controller)-. Using TC275(Infineon), MICROSAR(Vector AUTOSAR)-. Implement UART driver and add Sub MCU reprogramming service in FBL (flash bootloader)-. Implement China DC charging protocol (GB/T 27930) stack and application functions - including diag/fault handling (OBD2) and HV contactor control (Functional Safety, welding detection. ..) - adopted in Benz EQC(and PHEV)-. Implement CANoe CAPL environment to emulate vehicle ECU and charging station(EVSE) nodes-. Implement current derating logic (PI Control) to prevent high temperature coupler during DC charging(2015.04~2017.11) Develop battery powered doorbell type surveillance IP camera (Linux, Ambarella AP)

-. Develop mobile phone system SW (camera, lcd device driver/service, codec/media service)-. Develop 3G-324M(video call service) and SMS(IS-637A) SW(Protocol and UI)

-. Develop PBX(Private Branch eXchange) Digital trunk line call processing (including OAM - call trace, metering)-. Using SDL(specification and description language, ITU-T Z.100) - Telelogic TAU tool.