serial communication test

Dependencies:   mbed

Revision:
0:015c0b1cb2d4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Oct 30 14:20:09 2017 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/mbed_official/code/mbed/builds/97feb9bacc10
\ No newline at end of file