communication 5 SPI (Serial Peripheral Interface) 2024/08/12 I2C (Inter-Intergrated Circuit) 2024/08/09 UART (Universal asynchronous receiver/transmitter) 2024/08/08 직렬 통신 2024/08/08 winsock2 라이브러리를 이용한 채팅 구현 2024/04/17