How to turn a WaveShare nRF51-BLE400 into a discoverable beacon using mbed

Dependencies:   mbed BLE_API nRF51822

Port for WaveShare BLE400 (chip nRF51 Aliexpress devboard)
Android Evothings good example for Nordic nRF51822-DK

As target for mbed-online used <Nordic nRF51822>
- (Large green board Nordic nRF51822-mKIT, actually deprecated on 01/03/2019)

Briefly: Handle via Evothings BLE Application 4 LEDs and 2 Buttons(via notify messages).

Figure 1: Evothings Android application screenshot

Evothings application screenshot

Android Evothings application sources

Android application APK

Happy coding!
maxxir 02/03/19

Revision:
11:c9c0c4586c5f
Parent:
8:5442739198ec
Child:
12:06c984252bd1
--- a/main.cpp	Wed Mar 18 21:02:22 2015 +0000
+++ b/main.cpp	Thu Apr 02 17:19:16 2015 +0000
@@ -6,18 +6,15 @@
 // BLE object
 BLEDevice ble;
 
-// Optional name, add for human read-ability
+// Optional: Device Name, add for human read-ability
 //const static char     DEVICE_NAME[]        = "ChangeMe!!"; // Optional: device name
 
-/**
-  * You have up to 26 bytes of advertising data to use.
-  * Make up your own encoding for these 26bytes, send it across
-  * and decode it using the evothings app.
- */
+// You have up to 26 bytes of advertising data to use.
+
 //const static uint8_t AdvData[] = {"ChangeThisData"};         // example of character data
 const static uint8_t AdvData[] = {0x01,0x02,0x03,0x04,0x05};   // example of hex data
 
-// Restart advertising when phone app disconnects 
+// Optional: Restart advertising when phone app disconnects 
 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason){
     ble.startAdvertising(); 
 }
@@ -27,7 +24,9 @@
 {
     // Initialize BLE baselayer, always do this first!
     ble.init();
-    // ble.onDisconnection(disconnectionCallback); // Optional: add callback for disconnection
+    
+    // Optional: add callback for disconnection
+    // ble.onDisconnection(disconnectionCallback); 
 
     // Sacrifice 3B of 31B to Advertising Flags
     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE );
@@ -40,7 +39,7 @@
     //ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
 
     // Set advertising interval. Longer interval = longer battery life
-    ble.setAdvertisingInterval(160); // 100ms; in multiples of 0.625ms.
+    ble.setAdvertisingInterval(0.1); // 100ms, set as percentage of a second
     ble.startAdvertising();
 
     // Infinite loop waiting for BLE events