title: change the baud rate stty on MAC terminal
body: <p>I need to use USB serial cable with baud rate of 115200.
  I tried to set the rate with stty command from MACbook terminal application as follows;</p>
  
  <pre><code>$stty -f /dev/tty.usbserial-A103BTIB 115200
  </code></pre>
  
  <p>and confirmed the settings as follows;</p>
  
  <pre><code>$stty -f /dev/tty.usbserial-A103BTIB -a
  
  &amp;speed 9600 baud; 0 rows; 0 columns;
  lflags: -icanon -isig -iexten -echo -echoe -echok -echoke -echonl
      -echoctl -echoprt -altwerase -noflsh -tostop -flusho -pendin
      -nokerninfo -extproc
  iflags: -istrip -icrnl -inlcr -igncr -ixon -ixoff -ixany -imaxbel -iutf8
      -ignbrk -brkint -inpck -ignpar -parmrk
  oflags: -opost -onlcr -oxtabs -onocr -onlret
  cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb crtscts -dsrflow
      -dtrflow -mdmbuf
  cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = &lt;undef&gt;;
  eol2 = &lt;undef&gt;; erase = ^?; intr = ^C; kill = ^U; lnext = ^V;
  min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T;
  stop = ^S; susp = ^Z; time = 0; werase = ^W;
  </code></pre>
  
  <p>It looks baud rate is till 9600. Could somebody show me how to change this step by step ? </p>