HCI_CMD_ERICSSON_SET_UART_BAUD_RATE
const uint16_t opcode = htole16(HCI_CMD_ERICSSON_SET_UART_BAUD_RATE);
htole16(HCI_CMD_ERICSSON_SET_UART_BAUD_RATE);
uart_send_cmd(fd, HCI_CMD_ERICSSON_SET_UART_BAUD_RATE, &rate, sizeof(rate));