read water level from aduino water sensor, and forward it ti artik 710 board. and It controls humidifier by 2 channel relay module

Dependencies:   MbedJSONValue WebSocketClient

Revision:
0:a3a9a2aa25eb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Tue Jan 09 07:00:32 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#269f58d75b752a4e67a6a2d8c5c698635ffd6752