Serial Port C Example May 2026

void serial_write(int fd, const char *data, size_t len) ssize_t written = write(fd, data, len); if (written < 0) perror("write"); else printf("Wrote %ld bytes\n", written);

// Set baud rate cfsetospeed(&tty, baud); cfsetispeed(&tty, baud); serial port c example

struct termios tty; if (tcgetattr(fd, &tty) != 0) perror("tcgetattr"); close(fd); return -1; void serial_write(int fd, const char *data, size_t len)

gcc -o serial_example serial_example.c (you may need sudo for /dev/ttyUSB0 ): void serial_write(int fd