see: https://developer.mbed.org/users/phsfan/notebook/phsshield/

Dependencies:   a3gs mbed

Revision:
0:df54988c6d3e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/a3gs.lib	Fri Mar 20 08:22:38 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/phsfan/code/a3gs/#ca471c239d5f