main.cpp

00001 // ----------------------------------------------------------------------------
00002 // Copyright 2016-2018 ARM Ltd.
00003 //
00004 // SPDX-License-Identifier: Apache-2.0
00005 //
00006 // Licensed under the Apache License, Version 2.0 (the "License");
00007 // you may not use this file except in compliance with the License.
00008 // You may obtain a copy of the License at
00009 //
00010 //     http://www.apache.org/licenses/LICENSE-2.0
00011 //
00012 // Unless required by applicable law or agreed to in writing, software
00013 // distributed under the License is distributed on an "AS IS" BASIS,
00014 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015 // See the License for the specific language governing permissions and
00016 // limitations under the License.
00017 // ----------------------------------------------------------------------------
00018 #ifndef MBED_TEST_MODE
00019 
00020 #include "mbed.h"
00021 #include "simple-mbed-cloud-client.h"
00022 #include "FATFileSystem.h"
00023 #include "LittleFileSystem.h"
00024 
00025 // Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi.
00026 NetworkInterface *net = NetworkInterface::get_default_instance();
00027 
00028 // Default block device available on the target board
00029 BlockDevice *bd = BlockDevice::get_default_instance();
00030 
00031 #if COMPONENT_SD || COMPONENT_NUSD
00032 // Use FATFileSystem for SD card type blockdevices
00033 FATFileSystem fs("fs");
00034 #else
00035 // Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions
00036 LittleFileSystem fs("fs");
00037 #endif
00038 
00039 // Default User button for GET example
00040 InterruptIn button(BUTTON1);
00041 // Default LED to use for PUT/POST example
00042 DigitalOut led(LED1, 0);
00043 
00044 // Declaring pointers for access to Pelion Device Management Client resources outside of main()
00045 MbedCloudClientResource *res_button;
00046 MbedCloudClientResource *res_led;
00047 MbedCloudClientResource *res_post;
00048 
00049 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00050 // This is great because things such as network operations are illegal in ISR, so updating a resource in a button's fall() function is not allowed
00051 EventQueue eventQueue;
00052 
00053 // When the device is registered, this variable will be used to access various useful information, like device ID etc.
00054 static const ConnectorClientEndpointInfo* endpointInfo;
00055 
00056 /**
00057  * PUT handler - sets the value of the built-in LED
00058  * @param resource The resource that triggered the callback
00059  * @param newValue Updated value for the resource
00060  */
00061 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
00062     printf("*** PUT received, new value: %s                             \n", newValue.c_str());
00063     led = atoi(newValue.c_str());
00064 }
00065 
00066 /**
00067  * POST handler - prints the content of the payload
00068  * @param resource The resource that triggered the callback
00069  * @param buffer If a body was passed to the POST function, this contains the data.
00070  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00071  * @param size Size of the body
00072  */
00073 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
00074     printf("*** POST received (length %u). Payload: ", size);
00075     for (size_t ix = 0; ix < size; ix++) {
00076         printf("%02x ", buffer[ix]);
00077     }
00078     printf("\n");
00079 }
00080 
00081 /**
00082  * Button handler
00083  * This function will be triggered either by a physical button press or by a ticker every 5 seconds (see below)
00084  */
00085 void button_press() {
00086     int v = res_button->get_value_int() + 1;
00087     res_button->set_value(v);
00088     printf("*** Button clicked %d times                                 \n", v);
00089 }
00090 
00091 /**
00092  * Notification callback handler
00093  * @param resource The resource that triggered the callback
00094  * @param status The delivery status of the notification
00095  */
00096 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
00097     printf("*** Button notification, status %s (%d)                     \n", MbedCloudClientResource::delivery_status_to_string(status), status);
00098 }
00099 
00100 /**
00101  * Registration callback handler
00102  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00103  */
00104 void registered(const ConnectorClientEndpointInfo *endpoint) {
00105     printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00106     endpointInfo = endpoint;
00107 }
00108 
00109 int main(void) {
00110     printf("\nStarting Simple Pelion Device Management Client example\n");
00111 
00112     int storage_status = fs.mount(bd);
00113     if (storage_status != 0) {
00114         printf("Storage mounting failed.\n");
00115     }
00116     // If the User button is pressed ons start, then format storage.
00117     bool btn_pressed = (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE);
00118     if (btn_pressed) {
00119         printf("User button is pushed on start...\n");
00120     }
00121 
00122     if (storage_status || btn_pressed) {
00123         printf("Formatting the storage...\n");
00124         int storage_status = StorageHelper::format(&fs, bd);
00125         if (storage_status != 0) {
00126             printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
00127         }
00128     } else {
00129         printf("You can hold the user button during boot to format the storage and change the device identity.\n");
00130     }
00131 
00132     // Connect to the Internet (DHCP is expected to be on)
00133     printf("Connecting to the network using the default network interface...\n");
00134     net = NetworkInterface::get_default_instance();
00135 
00136     nsapi_error_t net_status = NSAPI_ERROR_NO_CONNECTION;
00137     while ((net_status = net->connect()) != NSAPI_ERROR_OK) {
00138         printf("Unable to connect to network (%d). Retrying...\n", net_status);
00139     }
00140 
00141     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00142 
00143     printf("Initializing Pelion Device Management Client...\n");
00144 
00145     // SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management
00146     SimpleMbedCloudClient client(net, bd, &fs);
00147     int client_status = client.init();
00148     if (client_status != 0) {
00149         printf("Pelion Client initialization failed (%d)\n", client_status);
00150         return -1;
00151     }
00152 
00153     // Creating resources, which can be written or read from the cloud
00154     res_button = client.create_resource("3200/0/5501", "Button Count");
00155     res_button->set_value(0);
00156     res_button->methods(M2MMethod::GET);
00157     res_button->observable(true);
00158     res_button->attach_notification_callback(button_callback);
00159 
00160     res_led = client.create_resource("3201/0/5853", "LED State");
00161     res_led->set_value(led.read());
00162     res_led->methods(M2MMethod::GET | M2MMethod::PUT);
00163     res_led->attach_put_callback(put_callback);
00164 
00165     res_post = client.create_resource("3300/0/5605", "Execute Function");
00166     res_post->methods(M2MMethod::POST);
00167     res_post->attach_post_callback(post_callback);
00168 
00169     printf("Initialized Pelion Device Management Client. Registering...\n");
00170 
00171     // Callback that fires when registering is complete
00172     client.on_registered(&registered);
00173 
00174     // Register with Pelion DM
00175     client.register_and_connect();
00176 
00177     // The button fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00178     button.fall(eventQueue.event(&button_press));
00179     printf("Press the user button to increment the LwM2M resource value...\n");
00180 
00181     // You can easily run the eventQueue in a separate thread if required
00182     eventQueue.dispatch_forever();
00183 }
00184 
00185 #endif /* MBED_TEST_MODE */