CH340 USB Serial Port Android Test is a System Utilities::Other software developed by zysoftsupport. After our trial and test, the software was found to be official, secure and free. Here is the official description for CH340 USB Serial Port Android Test: This is an android program to read/write CH340 chip with USB OTG. This program can help you test your CH340 chip by your android phone. It allow you to set baud rate, receive data, send data. The received data can be displayed as ASCII or HEX. Source code for sale. you can download CH340 USB Serial Port Android Test free now.