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", bd);
00034 #else
00035 // Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions
00036 LittleFileSystem fs("fs", bd);
00037 #endif
00038 
00039 #if USE_BUTTON == 1
00040 InterruptIn button(BUTTON1);
00041 #endif /* USE_BUTTON */
00042 
00043 // Default LED to use for PUT/POST example
00044 DigitalOut led(LED1);
00045 
00046 // Declaring pointers for access to Pelion Device Management Client resources outside of main()
00047 MbedCloudClientResource *button_res;
00048 MbedCloudClientResource *led_res;
00049 MbedCloudClientResource *post_res;
00050 
00051 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00052 // 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
00053 EventQueue eventQueue;
00054 
00055 /**
00056  * PUT handler - sets the value of the built-in LED
00057  * @param resource The resource that triggered the callback
00058  * @param newValue Updated value for the resource
00059  */
00060 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
00061     printf("PUT received. New value: %s\n", newValue.c_str());
00062     int tmp=atoi(newValue.c_str());
00063     if(tmp!=0 && tmp!=1) {
00064         printf("Unexpected value : %d!!!\n", tmp);
00065         return;
00066     }
00067     led = atoi(newValue.c_str());
00068 }
00069 
00070 /**
00071  * POST handler - prints the content of the payload
00072  * @param resource The resource that triggered the callback
00073  * @param buffer If a body was passed to the POST function, this contains the data.
00074  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00075  * @param size Size of the body
00076  */
00077 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
00078     printf("POST received (length %u). Payload: ", size);
00079     for (size_t ix = 0; ix < size; ix++) {
00080         printf("%02x ", buffer[ix]);
00081     }
00082     printf("\n");
00083 }
00084 
00085 /**
00086  * Button handler
00087  * This function will be triggered either by a physical button press or by a ticker every 5 seconds (see below)
00088  */
00089 void button_press() {
00090     int v = button_res->get_value_int() + 1;
00091     button_res->set_value(v);
00092     printf("Button clicked %d times\n", v);
00093 }
00094 
00095 /**
00096  * Notification callback handler
00097  * @param resource The resource that triggered the callback
00098  * @param status The delivery status of the notification
00099  */
00100 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
00101     printf("Button notification, status %s (%d)\n", MbedCloudClientResource::delivery_status_to_string(status), status);
00102 }
00103 
00104 /**
00105  * Registration callback handler
00106  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00107  */
00108 void registered(const ConnectorClientEndpointInfo *endpoint) {
00109     printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00110 }
00111 
00112 int main(void) {
00113     printf("\nStarting Simple Pelion Device Management Client example\n");
00114 
00115 #if USE_BUTTON == 1
00116     // If the User button is pressed ons start, then format storage.
00117     if (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE) {
00118         printf("User button is pushed on start. Formatting the storage...\n");
00119         int storage_status = StorageHelper::format(&fs, bd);
00120         if (storage_status != 0) {
00121             printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
00122         }
00123     } else {
00124         printf("You can hold the user button during boot to format the storage and change the device identity.\n");
00125     }
00126 #endif /* USE_BUTTON */
00127 
00128     // Connect to the Internet (DHCP is expected to be on)
00129     printf("Connecting to the network using the default network interface...\n");
00130     net = NetworkInterface::get_default_instance();
00131 
00132     nsapi_error_t net_status = NSAPI_ERROR_NO_CONNECTION;
00133     while ((net_status = net->connect()) != NSAPI_ERROR_OK) {
00134         printf("Unable to connect to network (%d). Retrying...\n", net_status);
00135     }
00136 
00137     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00138 
00139     printf("Initializing Pelion Device Management Client...\n");
00140 
00141     // SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management
00142     SimpleMbedCloudClient client(net, bd, &fs);
00143     int client_status = client.init();
00144     if (client_status != 0) {
00145         printf("Pelion Client initialization failed (%d)\n", client_status);
00146         return -1;
00147     }
00148 
00149     // Creating resources, which can be written or read from the cloud
00150     button_res = client.create_resource("3200/0/5501", "button_count");
00151     button_res->set_value(0);
00152     button_res->methods(M2MMethod::GET);
00153     button_res->observable(true);
00154     button_res->attach_notification_callback(button_callback);
00155 
00156     led_res = client.create_resource("3201/0/5853", "led_state");
00157     led_res->set_value(led.read());
00158     led_res->methods(M2MMethod::GET | M2MMethod::PUT);
00159     led_res->attach_put_callback(put_callback);
00160 
00161     post_res = client.create_resource("3300/0/5605", "execute_function");
00162     post_res->methods(M2MMethod::POST);
00163     post_res->attach_post_callback(post_callback);
00164 
00165     printf("Initialized Pelion Device Management Client. Registering...\n");
00166 
00167     // Callback that fires when registering is complete
00168     client.on_registered(&registered);
00169 
00170     // Register with Pelion DM
00171     client.register_and_connect();
00172 
00173 #if USE_BUTTON == 1
00174     // The button fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00175     button.fall(eventQueue.event(&button_press));
00176     printf("Press the user button to increment the LwM2M resource value...\n");
00177 #else
00178     // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00179     Ticker timer;
00180     timer.attach(eventQueue.event(&button_press), 5.0);
00181     printf("Simulating button press every 5 seconds...\n");
00182 #endif /* USE_BUTTON */
00183 
00184     // You can easily run the eventQueue in a separate thread if required
00185     eventQueue.dispatch_forever();
00186 }
00187 
00188 #endif /* MBED_TEST_MODE */