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 #include "string.h"
00026 
00027 // Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi.
00028 NetworkInterface *net = NetworkInterface::get_default_instance();
00029 
00030 // Default block device available on the target board
00031 BlockDevice *bd = BlockDevice::get_default_instance();
00032 
00033 #if COMPONENT_SD || COMPONENT_NUSD
00034 // Use FATFileSystem for SD card type blockdevices
00035 FATFileSystem fs("fs");
00036 #else
00037 // Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions
00038 LittleFileSystem fs("fs");
00039 #endif
00040 
00041 #if USE_BUTTON == 1
00042 InterruptIn button(BUTTON1);
00043 #endif /* USE_BUTTON */
00044 
00045 DigitalOut SD_POWER(PA_15, 1);
00046 #include "Wio_LED.h"
00047 
00048 // Declaring pointers for access to Pelion Device Management Client resources outside of main()
00049 MbedCloudClientResource *button_res;
00050 MbedCloudClientResource *led_res;
00051 MbedCloudClientResource *post_res;
00052 
00053 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00054 // 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
00055 EventQueue eventQueue;
00056 
00057 /**
00058  * PUT handler - sets the value of the built-in LED
00059  * @param resource The resource that triggered the callback
00060  * @param newValue Updated value for the resource
00061  */
00062 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
00063     printf("PUT received. New value: %s\n", newValue.c_str());
00064     if(atoi(newValue.c_str())) {
00065         setColor(WS2812_RED);
00066     } else {
00067         setColor(WS2812_BLACK);
00068     }
00069 }
00070 
00071 /**
00072  * POST handler - prints the content of the payload
00073  * @param resource The resource that triggered the callback
00074  * @param buffer If a body was passed to the POST function, this contains the data.
00075  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00076  * @param size Size of the body
00077  */
00078 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
00079     printf("POST received (length %u). Payload: ", size);
00080     for (size_t ix = 0; ix < size; ix++) {
00081         printf("%02x ", buffer[ix]);
00082     }
00083     printf("\n");
00084 }
00085 
00086 /**
00087  * Button handler
00088  * This function will be triggered either by a physical button press or by a ticker every 5 seconds (see below)
00089  */
00090 void button_press() {
00091     int v = button_res->get_value_int() + 1;
00092     button_res->set_value(v);
00093     printf("Button clicked %d times\n", v);
00094 }
00095 
00096 /**
00097  * Notification callback handler
00098  * @param resource The resource that triggered the callback
00099  * @param status The delivery status of the notification
00100  */
00101 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
00102     printf("Button notification, status %s (%d)\n", MbedCloudClientResource::delivery_status_to_string(status), status);
00103 }
00104 
00105 /**
00106  * Registration callback handler
00107  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00108  */
00109 void registered(const ConnectorClientEndpointInfo *endpoint) {
00110     printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00111 }
00112 
00113 int main(void) {
00114     printf("\nStarting Simple Pelion Device Management Client example\n");
00115 
00116     int storage_status = fs.mount(bd);
00117     if (storage_status != 0) {
00118         printf("Storage mounting failed.\n");
00119     }
00120 
00121 #if USE_BUTTON == 1
00122     // If the User button is pressed ons start, then format storage.
00123     bool btn_pressed = (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE);
00124     if (btn_pressed) {
00125         printf("User button is pushed on start...\n");
00126     }
00127 #else
00128     bool btn_pressed = false;
00129 #endif /* USE_BUTTON */
00130 
00131     if (storage_status || btn_pressed) {
00132         printf("Formatting the storage...\n");
00133         int storage_status = StorageHelper::format(&fs, bd);
00134         if (storage_status != 0) {
00135             printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
00136         }
00137     } else {
00138         printf("You can hold the user button during boot to format the storage and change the device identity.\n");
00139     }
00140 
00141     // Connect to the Internet (DHCP is expected to be on)
00142     printf("Connecting to the network using the default network interface...\n");
00143     net = NetworkInterface::get_default_instance();
00144 
00145     nsapi_error_t net_status = NSAPI_ERROR_NO_CONNECTION;
00146     while ((net_status = net->connect()) != NSAPI_ERROR_OK) {
00147         printf("Unable to connect to network (%d). Retrying...\n", net_status);
00148     }
00149 
00150     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00151 
00152     printf("Initializing Pelion Device Management Client...\n");
00153 
00154     // SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management
00155     SimpleMbedCloudClient client(net, bd, &fs);
00156     int client_status = client.init();
00157     if (client_status != 0) {
00158         printf("Pelion Client initialization failed (%d)\n", client_status);
00159         return -1;
00160     }
00161 
00162     // Creating resources, which can be written or read from the cloud
00163     button_res = client.create_resource("3200/0/5501", "button_count");
00164     button_res->set_value(0);
00165     button_res->methods(M2MMethod::GET);
00166     button_res->observable(true);
00167     button_res->attach_notification_callback(button_callback);
00168 
00169     led_res = client.create_resource("3201/0/5853", "led_state");
00170     led_res->set_value(0);
00171     led_res->methods(M2MMethod::GET | M2MMethod::PUT);
00172     led_res->attach_put_callback(put_callback);
00173 
00174     post_res = client.create_resource("3300/0/5605", "execute_function");
00175     post_res->methods(M2MMethod::POST);
00176     post_res->attach_post_callback(post_callback);
00177 
00178     printf("Initialized Pelion Device Management Client. Registering...\n");
00179 
00180     // Callback that fires when registering is complete
00181     client.on_registered(&registered);
00182 
00183     // Register with Pelion DM
00184     client.register_and_connect();
00185 
00186 #if USE_BUTTON == 1
00187     // The button fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00188     button.fall(eventQueue.event(&button_press));
00189     printf("Press the user button to increment the LwM2M resource value...\n");
00190 #else
00191     // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00192     Ticker timer;
00193     timer.attach(eventQueue.event(&button_press), 5.0);
00194     printf("Simulating button press every 5 seconds...\n");
00195 #endif /* USE_BUTTON */
00196 
00197     // You can easily run the eventQueue in a separate thread if required
00198     eventQueue.dispatch_forever();
00199 }
00200 
00201 #endif /* MBED_TEST_MODE */