diff --git a/ble/DiscoveredCharacteristic.h b/ble/DiscoveredCharacteristic.h
index eeb0936..faccde9 100644
--- a/ble/DiscoveredCharacteristic.h
+++ b/ble/DiscoveredCharacteristic.h
@@ -135,14 +135,6 @@ public:
      */
     ble_error_t write(uint16_t length, const uint8_t *value) const;
 
-    static void setupOnDataRead(GattClient::ReadCallback_t callback) {
-        onDataReadCallback = callback;
-    }
-
-    static void setupOnDataWrite(GattClient::WriteCallback_t callback) {
-        onDataWriteCallback = callback;
-    }
-
     void setupLongUUID(UUID::LongUUIDBytes_t longUUID) {
         uuid.setupLong(longUUID);
     }
@@ -182,10 +174,6 @@ protected:
     GattAttribute::Handle_t  valueHandle;
 
     Gap::Handle_t            connHandle;
-
-public:
-    static GattClient::ReadCallback_t  onDataReadCallback;
-    static GattClient::WriteCallback_t onDataWriteCallback;
 };
 
 #endif /*__DISCOVERED_CHARACTERISTIC_H__*/
diff --git a/ble/GattClient.h b/ble/GattClient.h
index f9f8ed4..89188a5 100644
--- a/ble/GattClient.h
+++ b/ble/GattClient.h
@@ -207,6 +207,23 @@ public:
         return BLE_ERROR_NOT_IMPLEMENTED; /* default implementation; override this API if this capability is supported. */
     }
 
+    /* Event callback handlers. */
+public:
+    /**
+     * Setup a callback for read response events.
+     */
+    void onDataRead(ReadCallback_t callback) {
+        onDataReadCallback = callback;
+    }
+
+    /**
+     * Setup a callback for write response events.
+     * @Note: write commands (issued using writeWoResponse) don't generate a response.
+     */
+    void onDataWrite(WriteCallback_t callback) {
+        onDataWriteCallback = callback;
+    }
+
     /**
      * Setup callback for when serviceDiscovery terminates.
      */
@@ -219,6 +236,24 @@ protected:
         /* empty */
     }
 
+    /* Entry points for the underlying stack to report events back to the user. */
+public:
+    void processReadResponse(const GattReadCallbackParams *params) {
+        if (onDataReadCallback) {
+            onDataReadCallback(params);
+        }
+    }
+
+    void processWriteResponse(const GattWriteCallbackParams *params) {
+        if (onDataWriteCallback) {
+            onDataWriteCallback(params);
+        }
+    }
+
+protected:
+    ReadCallback_t  onDataReadCallback;
+    WriteCallback_t onDataWriteCallback;
+
 private:
     /* disallow copy and assignment */
     GattClient(const GattClient &);
diff --git a/source/DiscoveredCharacteristic.cpp b/source/DiscoveredCharacteristic.cpp
index 3991421..5d0133d 100644
--- a/source/DiscoveredCharacteristic.cpp
+++ b/source/DiscoveredCharacteristic.cpp
@@ -17,9 +17,6 @@
 #include "ble/DiscoveredCharacteristic.h"
 #include "ble/GattClient.h"
 
-GattClient::ReadCallback_t  DiscoveredCharacteristic::onDataReadCallback;
-GattClient::WriteCallback_t DiscoveredCharacteristic::onDataWriteCallback;
-
 ble_error_t
 DiscoveredCharacteristic::read(uint16_t offset) const
 {