.. -*- coding: utf-8; -*-======= RS232=======.. contents:: :local:Pinout======Rx/TxRTS/CTS/DTR/DSRSignal Level converts=====================MAX 232 is from an RS-232 serial port to signals suitable for use in TTLcircuit.* http://en.wikipedia.org/wiki/MAX232USB to COM chip===============PL-2303:http://www.prolific.com.tw/eng/products.asp?id=59 about/overviewhttp://www.prolific.com.tw/eng/downloads.asp?ID=23 datasheet download pagehttp://www.prolific.com.tw/eng/downloads.asp?id=31 driver download page