This is my c++ code:
#include <iostream>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
void createConnect(){
const char *portname = "/dev/ttyACM0";
int fd = open (portname, O_RDWR | O_NOCTTY | O_SYNC);
if (fd < 0)
{
std::cout << "error: " << errno << " portname: " << portname << " strerror: " << strerror << std::endl;
}
}
This is output:
error: 13 portname: /dev/ttyACM0 strerror: 1
When I connect the phone to the USB port, this code don't give the error. But When I connect the Arduino Uno to the USB port, this code gives the error. Error is "Permission denied". How Can I solve this problem?
