Hiroia is a company that produces coffee brewing related machines. I writen iOS APP for online shopping and machine control in the early stage. Focus on coffee machine base on STM32WB firmware after 2020. 1. iOS APP development of online shopping applications 2. iOS APP connects to the coffee machine through BLE to create a customizable coffee machine 3. iOS APP connects to the scale through BLE to update the scale and record brewing data 4. iOS APP controls simonelli eagle one through BLE to perform customized operations 5. Write coffee machine firmware base on STM32WB55 chip. 6. Use PHP and Laravel framework+ JQuery in AWS server. It provided API for iOS APP. 7. iOS APP downloads data from the server and updates machine data, including firmware updates, and customization settings 8. Write Bootloader on STM32WB55 for OTA use. 9. The chip uses I2C to communicate with the light bar 10.Use SPI to reads LoadCell weighing row data and filter 11. Use PWM to controls water flow size and buzzer 12. Receiving key events and sending light signals by UART DMA.

Focused on the development of scales in the period. Start to write iOS program to operate the scale after 2013 . 1. Wrote the 8051 chip firmware program with keil C. 2. High-precision scale filter design 3. ISP of scale. It split the chip space into main space and a independent space to store small executable firmware for updating firmware via UART 4. Used I2C to control EEPROM 5. Write and iOS APP to communicate with the coffee scale via Bluetooth and records coffee brewing data

The main work is maintenance phone. 1. Use C to write human-machine interface programs 2. Debug functions related to telephone communication 3. Collaboration with CodeReview

Game production is co-work with game engine, game production, art, and PM. The main responsibility is the operation of the game, and the partial operation of the scene. 1. Multi-disciplinary team collaboration 2. Operational Arithmetic Method (like Path founding) 3. Creativity base on the game engine

The main work is to use VC++ filter email 1. Get the mail content by the mail server API 2. Recover original message main body, inclusion appendix in Base64 3. Compare plain content with database 4. Read image file, and use special algorithm to filter image.