--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rs232.rst	Mon Feb 22 12:46:36 2016 +0200
@@ -0,0 +1,35 @@
+.. -*- coding: utf-8; -*-
+.. include:: HEADER.rst
+
+=======
+ RS232
+=======
+.. contents::
+   :local:
+
+Pinout
+======
+
+Rx/Tx
+RTS/CTS/DTR/DSR
+
+Signal Level converts
+=====================
+
+MAX 232 is from an RS-232 serial port to signals suitable for use in TTL
+circuit.
+
+  http://en.wikipedia.org/wiki/MAX232
+
+USB to COM chip
+===============
+
+PL-2303:
+
+  http://www.prolific.com.tw/eng/products.asp?id=59
+                about/overview
+  http://www.prolific.com.tw/eng/downloads.asp?ID=23
+                datasheet download page
+  http://www.prolific.com.tw/eng/downloads.asp?id=31
+                driver download page
+