root@trb-dev:/home/mod6/fg3# stty -F /dev/ttyUSB0 115200 raw -echo -echoe -echok
root@trb-dev:/home/mod6/fg3# dd iflag=fullblock if=/dev/ttyUSB0 of=fg3.fg2.bin
^C2224079+0 records in
2224079+0 records out
1138728448 bytes (1.1 GB) copied, 150727 s, 7.6 kB/s

root@trb-dev:/home/mod6/fg3# ent fg3.fg2.bin
Entropy = 8.000000 bits per byte.

Optimum compression would reduce the size
of this 1138728448 byte file by 0 percent.

Chi square distribution for 1138728448 samples is 241.70, and randomly
would exceed this value 50.00 percent of the times.

Arithmetic mean value of data bytes is 127.5011 (127.5 = random).
Monte Carlo value for Pi is 3.141711022 (error 0.00 percent).
Serial correlation coefficient is -0.000052 (totally uncorrelated = 0.0).
root@trb-dev:/home/mod6/fg3# ls