close #44 add client battery notify with callback support

Author: hathach

libraries/Bluefruit52Lib/src/clients/BLEClientBas.cpp

@@ -69,3 +69,19 @@ uint8_t BLEClientBas::read(void)
 {
   return _battery.read8();
 }
+
+bool BLEClientBas::enableNotify(void)
+{
+  return _battery.enableNotify();
+}
+
+bool BLEClientBas::disableNotify(void)
+{
+  return _battery.disableNotify();
+}
+
+void BLEClientBas::setNotifyCallback(BLEClientCharacteristic::notify_cb_t fp, bool useAdaCallback)
+{
+  return _battery.setNotifyCallback(fp, useAdaCallback);
+}
+

libraries/Bluefruit52Lib/src/clients/BLEClientBas.h

@@ -51,6 +51,11 @@ class BLEClientBas : public BLEClientService
 
     uint8_t read(void);
 
+    bool enableNotify(void);
+    bool disableNotify(void);
+
+    void setNotifyCallback(BLEClientCharacteristic::notify_cb_t fp, bool useAdaCallback = true);
+
   private:
     BLEClientCharacteristic _battery;
 };