This is an example of BLE GATT Client, which receives broadcast data from BLE_Server_BME280 ( a GATT server) , then transfers values up to mbed Device Connector (cloud).

Please refer details about BLEClient_mbedDevConn below. https://github.com/soramame21/BLEClient_mbedDevConn

The location of required BLE GATT server, BLE_Server_BME280, is at here. https://developer.mbed.org/users/edamame22/code/BLE_Server_BME280/

Revision:
0:29983394c6b6
diff -r 000000000000 -r 29983394c6b6 mbed-client/source/m2mserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-client/source/m2mserver.cpp	Thu Apr 13 04:48:11 2017 +0000
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2015 ARM Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed-client/m2mserver.h"
+#include "mbed-client/m2mconstants.h"
+#include "mbed-client/m2mobject.h"
+#include "mbed-client/m2mobjectinstance.h"
+#include "mbed-client/m2mresource.h"
+#include "mbed-client/m2mstring.h"
+
+#define TRACE_GROUP "mClt"
+
+#define BUFFER_SIZE 21
+
+M2MServer::M2MServer()
+: M2MObject(M2M_SERVER_ID, stringdup(M2M_SERVER_ID))
+{
+    M2MObject::create_object_instance();
+
+    _server_instance = object_instance();
+
+    if(_server_instance) {
+
+        M2MResource* res = _server_instance->create_dynamic_resource(SERVER_SHORT_SERVER_ID,
+                                                                     OMA_RESOURCE_TYPE,
+                                                                     M2MResourceInstance::INTEGER,
+                                                                     true);
+        if(res) {
+            res->set_operation(M2MBase::GET_PUT_ALLOWED);
+        }
+        res = _server_instance->create_dynamic_resource(SERVER_LIFETIME,
+                                                        OMA_RESOURCE_TYPE,
+                                                        M2MResourceInstance::INTEGER,
+                                                        true);
+        if(res) {
+            res->set_operation(M2MBase::GET_PUT_POST_ALLOWED);
+        }
+        res = _server_instance->create_dynamic_resource(SERVER_NOTIFICATION_STORAGE,
+                                                        OMA_RESOURCE_TYPE,
+                                                        M2MResourceInstance::BOOLEAN,
+                                                        true);
+        if(res) {
+            res->set_operation(M2MBase::GET_PUT_POST_ALLOWED);
+        }
+        res = _server_instance->create_dynamic_resource(SERVER_BINDING,
+                                                        OMA_RESOURCE_TYPE,
+                                                        M2MResourceInstance::STRING,
+                                                        true);
+        if(res) {
+            res->set_operation(M2MBase::GET_PUT_POST_ALLOWED);
+        }
+        res = _server_instance->create_dynamic_resource(SERVER_REGISTRATION_UPDATE,
+                                                        OMA_RESOURCE_TYPE,
+                                                        M2MResourceInstance::OPAQUE,
+                                                        false);
+        if(res) {
+          res->set_operation(M2MBase::POST_ALLOWED);
+        }
+    }
+}
+
+M2MServer::~M2MServer()
+{
+
+}
+
+M2MResource* M2MServer::create_resource(ServerResource resource, uint32_t value)
+{
+    M2MResource* res = NULL;
+    const char* server_id_ptr = "";
+    if(!is_resource_present(resource)) {
+        switch(resource) {
+        case DefaultMinPeriod:
+            server_id_ptr = SERVER_DEFAULT_MIN_PERIOD;
+            break;
+        case DefaultMaxPeriod:
+            server_id_ptr = SERVER_DEFAULT_MAX_PERIOD;
+            break;
+        case DisableTimeout:
+            server_id_ptr = SERVER_DISABLE_TIMEOUT;
+            break;
+        default:
+            break;
+        }
+    }
+    String server_id(server_id_ptr);
+    
+    if(!server_id.empty()) {
+        if(_server_instance) {
+            res = _server_instance->create_dynamic_resource(server_id,
+                                                            OMA_RESOURCE_TYPE,
+                                                            M2MResourceInstance::INTEGER,
+                                                            true);
+            if(res) {
+                res->set_operation(M2MBase::GET_PUT_POST_ALLOWED);
+                
+                res->set_value(value);
+            }
+        }
+    }
+    return res;
+}
+
+M2MResource* M2MServer::create_resource(ServerResource resource)
+{
+    M2MResource* res = NULL;
+    if(!is_resource_present(resource)) {
+        if(M2MServer::Disable == resource) {
+                if(_server_instance) {
+                    res = _server_instance->create_dynamic_resource(SERVER_DISABLE,
+                                                                    OMA_RESOURCE_TYPE,
+                                                                    M2MResourceInstance::OPAQUE,
+                                                                    false);
+                if(res) {
+                    res->set_operation(M2MBase::POST_ALLOWED);
+                }
+            }
+        }
+    }
+    return res;
+}
+
+bool M2MServer::delete_resource(ServerResource resource)
+{
+    bool success = false;
+    const char* server_id_ptr;
+    switch(resource) {
+        case DefaultMinPeriod:
+           server_id_ptr = SERVER_DEFAULT_MIN_PERIOD;
+           break;
+        case DefaultMaxPeriod:
+            server_id_ptr = SERVER_DEFAULT_MAX_PERIOD;
+            break;
+        case Disable:
+            server_id_ptr = SERVER_DISABLE;
+            break;
+        case DisableTimeout:
+            server_id_ptr = SERVER_DISABLE_TIMEOUT;
+            break;
+        default:
+            server_id_ptr = NULL;
+            break;
+    }
+
+    if(server_id_ptr) {
+        if(_server_instance) {
+            success = _server_instance->remove_resource(server_id_ptr);
+        }
+    }
+    return success;
+}
+
+bool M2MServer::set_resource_value(ServerResource resource,
+                                   const String &value)
+{
+    bool success = false;
+    M2MResource* res = get_resource(resource);
+    if(res && (M2MServer::Binding == resource)) {
+        success = res->set_value((const uint8_t*)value.c_str(),(uint32_t)value.length());
+    }
+    return success;
+}
+
+bool M2MServer::set_resource_value(ServerResource resource,
+                                   uint32_t value)
+{
+    bool success = false;
+    M2MResource* res = get_resource(resource);
+    if(res) {
+        if(M2MServer::ShortServerID == resource     ||
+           M2MServer::Lifetime == resource          ||
+           M2MServer::DefaultMinPeriod == resource  ||
+           M2MServer::DefaultMaxPeriod == resource  ||
+           M2MServer::DisableTimeout == resource    ||
+           M2MServer::NotificationStorage == resource) {
+            // If it is any of the above resource
+            // set the value of the resource.
+
+            success = res->set_value(value);
+        }
+    }
+    return success;
+}
+
+String M2MServer::resource_value_string(ServerResource resource) const
+{
+    String value = "";
+    M2MResource* res = get_resource(resource);
+    if(res && (M2MServer::Binding == resource)) {
+
+        value = res->get_value_string();
+    }
+    return value;
+}
+
+
+uint32_t M2MServer::resource_value_int(ServerResource resource) const
+{
+    uint32_t value = 0;
+    M2MResource* res = get_resource(resource);
+    if(res) {
+        if(M2MServer::ShortServerID == resource     ||
+           M2MServer::Lifetime == resource          ||
+           M2MServer::DefaultMinPeriod == resource  ||
+           M2MServer::DefaultMaxPeriod == resource  ||
+           M2MServer::DisableTimeout == resource    ||
+           M2MServer::NotificationStorage == resource) {
+
+            value = res->get_value_int();
+        }
+    }
+    return value;
+}
+
+bool M2MServer::is_resource_present(ServerResource resource) const
+{
+    bool success = false;
+    M2MResource *res = get_resource(resource);
+    if(res) {
+        success = true;
+    }
+    return success;
+}
+
+uint16_t M2MServer::total_resource_count() const
+{
+    uint16_t total_count = 0;
+    if(_server_instance) {
+    total_count = _server_instance->resources().size();
+    }
+    return total_count;
+}
+
+M2MResource* M2MServer::get_resource(ServerResource res) const
+{
+    M2MResource* res_object = NULL;
+    const char* res_name_ptr = NULL;
+    switch(res) {
+    case ShortServerID:
+        res_name_ptr = SERVER_SHORT_SERVER_ID;
+        break;
+    case Lifetime:
+        res_name_ptr = SERVER_LIFETIME;
+        break;
+    case DefaultMinPeriod:
+        res_name_ptr = SERVER_DEFAULT_MIN_PERIOD;
+        break;
+    case DefaultMaxPeriod:
+        res_name_ptr = SERVER_DEFAULT_MAX_PERIOD;
+        break;
+    case Disable:
+        res_name_ptr = SERVER_DISABLE;
+        break;
+    case DisableTimeout:
+        res_name_ptr = SERVER_DISABLE_TIMEOUT;
+        break;
+    case NotificationStorage:
+        res_name_ptr = SERVER_NOTIFICATION_STORAGE;
+        break;
+    case Binding:
+        res_name_ptr = SERVER_BINDING;
+        break;
+    case RegistrationUpdate:
+        res_name_ptr = SERVER_REGISTRATION_UPDATE;
+        break;
+    }
+
+    if(res_name_ptr) {
+        if(_server_instance) {
+            res_object = _server_instance->resource(res_name_ptr);
+        }
+    }
+    return res_object;
+}