Better OS detection

[ptrdvds]

I found that os detection does not work for Mac OS.

Please use:

import platform

if platform.system() == "Linux":
    import fcntl

def sender(self):
    while True:
        if not(self.enabled):
            continue
        if platform.system() == "Linux":
            fcntl.ioctl(self.desc, 0x5427) # Yeah, it's magic. Start Break (TIOCSBRK)
            time.sleep(0.0001)
            fcntl.ioctl(self.desc, 0x5428) # Yeah, it's magic. End Break (TIOCCBRK)
        else:
            self.ser.send_break(0.0001)

https://docs.python.org/3.8/library/platform.html

I tried to use a pull request, but it was to cumbersome.

Thanks for the code, it works for me, but with changes merged to master for OS detection, it easier to use.
I am a mac and linux user :)

Chears Peter

[ptrdvds]

The platform test could also be used to set the default USB port for an OS.
Eg.:
For "Darwin" : '/dev/tty.usbserial-1420'
For "Linux" : '/dev/ttyUSB0