fix bug crash after 3 minutes

Dependencies:   BLE_API MbedJSONValue mbed nRF51822

Fork of BLE_RedBearNano-SAndroidE by gio wild

Revision:
0:8d3dd6e411bf
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nRF51822.lib	Mon Nov 28 10:58:38 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#c90ae1400bf2