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 #ifdef TARGET_UBLOX_C030_R41XM
00026 #include "UbloxATCellularInterface.h"
00027 #endif
00028 
00029 #define PIN "0000"
00030 
00031 // Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi.
00032 NetworkInterface *net;
00033 
00034 // Default block device available on the target board
00035 BlockDevice *bd = BlockDevice::get_default_instance();
00036 
00037 #if COMPONENT_SD || COMPONENT_NUSD
00038 // Use FATFileSystem for SD card type blockdevices
00039 FATFileSystem fs("fs");
00040 #else
00041 // Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions
00042 LittleFileSystem fs("fs");
00043 #endif
00044 
00045 // Default User button for GET example
00046 InterruptIn button(BUTTON1);
00047 // Default LED to use for PUT/POST example
00048 DigitalOut led(LED1, 0);
00049 
00050 // Declaring pointers for access to Pelion Device Management Client resources outside of main()
00051 MbedCloudClientResource *res_button;
00052 MbedCloudClientResource *res_led;
00053 MbedCloudClientResource *res_post;
00054 
00055 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00056 // 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
00057 EventQueue eventQueue;
00058 
00059 // When the device is registered, this variable will be used to access various useful information, like device ID etc.
00060 static const ConnectorClientEndpointInfo* endpointInfo;
00061 
00062 /**
00063  * PUT handler - sets the value of the built-in LED
00064  * @param resource The resource that triggered the callback
00065  * @param newValue Updated value for the resource
00066  */
00067 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
00068     printf("*** PUT received, new value: %s                             \n", newValue.c_str());
00069     led = atoi(newValue.c_str());
00070 }
00071 
00072 /**
00073  * POST handler - prints the content of the payload
00074  * @param resource The resource that triggered the callback
00075  * @param buffer If a body was passed to the POST function, this contains the data.
00076  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00077  * @param size Size of the body
00078  */
00079 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
00080     printf("*** POST received (length %u). Payload: ", size);
00081     for (size_t ix = 0; ix < size; ix++) {
00082         printf("%02x ", buffer[ix]);
00083     }
00084     printf("\n");
00085 }
00086 
00087 /**
00088  * Button handler
00089  * This function will be triggered either by a physical button press or by a ticker every 5 seconds (see below)
00090  */
00091 void button_press() {
00092     int v = res_button->get_value_int() + 1;
00093     res_button->set_value(v);
00094     printf("*** Button clicked %d times                                 \n", v);
00095 }
00096 
00097 /**
00098  * Notification callback handler
00099  * @param resource The resource that triggered the callback
00100  * @param status The delivery status of the notification
00101  */
00102 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
00103     printf("*** Button notification, status %s (%d)                     \n", MbedCloudClientResource::delivery_status_to_string(status), status);
00104 }
00105 
00106 /**
00107  * Registration callback handler
00108  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00109  */
00110 void registered(const ConnectorClientEndpointInfo *endpoint) {
00111     printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00112     endpointInfo = endpoint;
00113 }
00114 
00115 int main(void) {
00116     printf("\nStarting Simple Pelion Device Management Client example\n");
00117 
00118     int storage_status = fs.mount(bd);
00119     if (storage_status != 0) {
00120         printf("Storage mounting failed.\n");
00121     }
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 
00128     if (storage_status || btn_pressed) {
00129         printf("Formatting the storage...\n");
00130         int storage_status = StorageHelper::format(&fs, bd);
00131         if (storage_status != 0) {
00132             printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
00133         }
00134     } else {
00135         printf("You can hold the user button during boot to format the storage and change the device identity.\n");
00136     }
00137 
00138     // Connect to the Internet (DHCP is expected to be on)
00139     printf("Connecting to the network using the default network interface...\n");
00140 #if !NSAPI_PPP_AVAILABLE
00141     net = new UbloxATCellularInterface();
00142 
00143     if (((UbloxATCellularInterface*)net)->init(PIN)) {
00144 
00145         if ( (((UbloxATCellularInterface*)net)->is_registered_csd() || ((UbloxATCellularInterface*)net)->is_registered_psd() || ((UbloxATCellularInterface*)net)->is_registered_eps()) ) {
00146             printf("De-registering...\n\n");
00147             ((UbloxATCellularInterface*)net)->nwk_deregistration();
00148         }
00149 
00150 
00151         if (((UbloxATCellularInterface*)net)->set_modem_rat(UbloxATCellularInterface::GPRS_EGPRS)) {
00152             printf("GPRS_EGPRS RAT configured\n");
00153         }
00154 
00155         if (((UbloxATCellularInterface*)net)->reboot_modem()) {
00156             printf("Rebooting modem\n");
00157         }
00158     }
00159 #else
00160     net = NetworkInterface::get_default_instance();
00161 #endif
00162 
00163     nsapi_error_t net_status = NSAPI_ERROR_NO_CONNECTION;
00164     while ((net_status = net->connect()) != NSAPI_ERROR_OK) {
00165         printf("Unable to connect to network (%d). Retrying...\n", net_status);
00166     }
00167 
00168     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00169 
00170     printf("Initializing Pelion Device Management Client...\n");
00171 
00172     // SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management
00173     SimpleMbedCloudClient client(net, bd, &fs);
00174     int client_status = client.init();
00175     if (client_status != 0) {
00176         printf("Pelion Client initialization failed (%d)\n", client_status);
00177         return -1;
00178     }
00179 
00180     // Creating resources, which can be written or read from the cloud
00181     res_button = client.create_resource("3200/0/5501", "Button Count");
00182     res_button->set_value(0);
00183     res_button->methods(M2MMethod::GET);
00184     res_button->observable(true);
00185     res_button->attach_notification_callback(button_callback);
00186 
00187     res_led = client.create_resource("3201/0/5853", "LED State");
00188     res_led->set_value(led.read());
00189     res_led->methods(M2MMethod::GET | M2MMethod::PUT);
00190     res_led->attach_put_callback(put_callback);
00191 
00192     res_post = client.create_resource("3300/0/5605", "Execute Function");
00193     res_post->methods(M2MMethod::POST);
00194     res_post->attach_post_callback(post_callback);
00195 
00196     printf("Initialized Pelion Device Management Client. Registering...\n");
00197 
00198     // Callback that fires when registering is complete
00199     client.on_registered(&registered);
00200 
00201     // Register with Pelion DM
00202     client.register_and_connect();
00203 
00204     // The button fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00205     button.fall(eventQueue.event(&button_press));
00206     printf("Press the user button to increment the LwM2M resource value...\n");
00207 
00208     // You can easily run the eventQueue in a separate thread if required
00209     eventQueue.dispatch_forever();
00210 }
00211 
00212 #endif /* MBED_TEST_MODE */