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 #include "mbed.h"
00020 #include "simple-mbed-cloud-client.h"
00021 #include "FATFileSystem.h"
00022 
00023 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00024 // 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
00025 EventQueue eventQueue;
00026 
00027 // Default block device
00028 BlockDevice* bd = BlockDevice::get_default_instance();
00029 FATFileSystem fs("sd", bd);
00030 
00031 // Default network interface object
00032 NetworkInterface *net;
00033 
00034 
00035 InterruptIn btn(USER_BUTTON0);
00036 
00037 // Declaring pointers for access to Pelion Client resources outside of main()
00038 MbedCloudClientResource *button_res;
00039 MbedCloudClientResource *pattern_res;
00040 
00041 void button_press()
00042 {
00043     int v = button_res->get_value_int() + 1;
00044 
00045     button_res->set_value(v);
00046 
00047     printf("User button clicked %d times\n", v);
00048 }
00049 
00050 /**
00051  * PUT handler
00052  * @param resource The resource that triggered the callback
00053  * @param newValue Updated value for the resource
00054  */
00055 void pattern_updated(MbedCloudClientResource *resource, m2m::String newValue)
00056 {
00057     printf("PUT received, new value: %s\n", newValue.c_str());
00058 }
00059 
00060 /**
00061  * POST handler
00062  * @param resource The resource that triggered the callback
00063  * @param buffer If a body was passed to the POST function, this contains the data.
00064  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00065  * @param size Size of the body
00066  */
00067 void blink_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size)
00068 {
00069     printf("POST received. Going to blink LED pattern: %s\n", pattern_res->get_value().c_str());
00070 
00071     static DigitalOut augmentedLed(LED1); // LED that is used for blinking the pattern
00072 
00073     // Parse the pattern string, and toggle the LED in that pattern
00074     string s = std::string(pattern_res->get_value().c_str());
00075     size_t i = 0;
00076     size_t pos = s.find(':');
00077     while (pos != string::npos) {
00078         wait_ms(atoi(s.substr(i, pos - i).c_str()));
00079         augmentedLed = !augmentedLed;
00080 
00081         i = ++pos;
00082         pos = s.find(':', pos);
00083 
00084         if (pos == string::npos) {
00085             wait_ms(atoi(s.substr(i, s.length()).c_str()));
00086             augmentedLed = !augmentedLed;
00087         }
00088     }
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 {
00098     printf("Button notification, status %s (%d)\n", MbedCloudClientResource::delivery_status_to_string(status), status);
00099 }
00100 
00101 /**
00102  * Registration callback handler
00103  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00104  */
00105 void registered(const ConnectorClientEndpointInfo *endpoint)
00106 {
00107     printf("Connected to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00108 }
00109 
00110 int main(void)
00111 {
00112     printf("Starting Simple Pelion Device Management Client example\n");
00113     printf("Connecting to the network using Wi-Fi...\n");
00114 
00115     // Connect to the internet (DHCP is expected to be on)
00116     net = NetworkInterface::get_default_instance();
00117 
00118     nsapi_error_t status = net->connect();
00119 
00120     if (status != NSAPI_ERROR_OK) {
00121         printf("Connecting to the network failed %d!\n", status);
00122         return -1;
00123     }
00124 
00125     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00126 
00127     // SimpleMbedCloudClient handles registering over LwM2M to Mbed Cloud
00128     SimpleMbedCloudClient client(net, bd, &fs);
00129     int client_status = client.init();
00130     if (client_status != 0) {
00131         printf("Pelion Client initialization failed (%d)\n", client_status);
00132         return -1;
00133     }
00134 
00135     // Creating resources, which can be written or read from the cloud
00136     button_res = client.create_resource("3200/0/5501", "button_count");
00137     button_res->set_value(0);
00138     button_res->methods(M2MMethod::GET);
00139     button_res->observable(true);
00140     button_res->attach_notification_callback(button_callback);
00141 
00142     pattern_res = client.create_resource("3201/0/5853", "blink_pattern");
00143     pattern_res->set_value("500:500:500:500:500:500:500:500");
00144     pattern_res->methods(M2MMethod::GET | M2MMethod::PUT);
00145     pattern_res->attach_put_callback(pattern_updated);
00146 
00147     MbedCloudClientResource *blink_res = client.create_resource("3201/0/5850", "blink_action");
00148     blink_res->methods(M2MMethod::POST);
00149     blink_res->attach_post_callback(blink_callback);
00150 
00151     printf("Initialized Pelion Client. Registering...\n");
00152 
00153     // Callback that fires when registering is complete
00154     client.on_registered(&registered);
00155 
00156     // Register with Mbed Cloud
00157     client.register_and_connect();
00158 
00159     // Setup the button
00160     btn.mode(PullUp);
00161 
00162     // The button fall handler is placed in the event queue so it will run in
00163     // thread context instead of ISR context, which allows safely updating the cloud resource
00164     btn.fall(eventQueue.event(&button_press));
00165 
00166     // You can easily run the eventQueue in a separate thread if required
00167     eventQueue.dispatch_forever();
00168 }
00169 #endif