Update README.md

README.md

@@ -1,4 +1,3 @@
-
 arduino-serial -- C code to talk to Arduino
 ===========================================
 
@@ -7,7 +6,8 @@ Original URL: http://todbot.com/blog/2006/12/06/arduino-serial-c-code-to-talk-to
 Post about changes: http://todbot.com/blog/2013/04/29/arduino-serial-updated/
 
 
-Usage is:
+Usage
+------
 <pre>
 laptop%  ./arduino-serial
 Usage: arduino-serial -b <bps> -p <serialport> [OPTIONS]
@@ -29,10 +29,31 @@ Options:
 Note: Order is important. Set '-b' baudrate before opening port'-p'.
       Used to make series of actions: '-d 2000 -s hello -d 100 -r'
       means 'wait 2secs, send 'hello', wait 100msec, get reply'
-d
+
 </pre>
 
 
+Downloads
+---------
+For convenience, here's some pre-built versions of arduino-serial. 
+They may not be updated regularly, so compile it yourself if you can.
+Click the "view raw" to get the actual zip file.
+
+- https://github.com/todbot/arduino-serial/blob/master/arduino-serial-macosx.zip
+- https://github.com/todbot/arduino-serial/blob/master/arduino-serial-linux.zip
+
+
+Compilation
+-----------
 arduino-serial should compile on any POSIX-compatible system.
 Tested on Mac OS X, Ubuntu Linux, Raspian Linux, Beaglebone Linux
 
+To build, just check it out, make, and run it like:
+<pre>
+% git clone https://github.com/todbot/arduino-serial.git
+% cd arduino-serial
+% make
+% ./arduino-serial
+</pre>
+
+For more details on the build process, see the Makefile.