A variable is acquired from an electronic balance.
It corresponds to a 3.2 or more-Android terminal.
Checking of operations is carried out by Xperia A SO-04E and Nexus7.
The USB serial communication chip corresponds to the product made by FTDI.
Please prepare separately the RS-232C cable (crossing) for connecting an electronic balance and an android terminal, the RS-232C→USB conversion cable, etc.