Simple serial read bytes counter.
Usage:
$ python ./start.py serial_port [sampling_duration_sec]
Example:
$ python ./start.py /dev/tty.usbmodem1234 10
Enter Ctrl+C twice to exit!
1458614648 : 838 bytes/sec
1458614649 : 729 bytes/sec
1458614650 : 729 bytes/sec
1458614651 : 804 bytes/sec
1458614652 : 735 bytes/sec
1458614653 : 729 bytes/sec
1458614654 : 729 bytes/sec
1458614655 : 810 bytes/sec
1458614656 : 729 bytes/sec
1458614657 : 729 bytes/sec
========================================
Total Time in Seconds => 10
Total Received Bytes => 7561
Mean Received Bytes Per Second => 756.10
Baud Rate in Bit Per Second => 115200
========================================