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 
00024 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00025 // 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
00026 EventQueue eventQueue;
00027 
00028 #if defined(TARGET_WIO_3G)
00029 DigitalOut SD_POWER(PA_15, 1);
00030 #endif
00031 
00032 // Default block device
00033 BlockDevice* bd = BlockDevice::get_default_instance();
00034 FATFileSystem fs("sd", bd);
00035 
00036 // Default network interface object
00037 CellularBase *net;
00038 
00039 // Declaring pointers for access to Mbed Cloud Client resources outside of main()
00040 MbedCloudClientResource *button_res;
00041 MbedCloudClientResource *pattern_res;
00042 
00043 // This function gets triggered by the timer. It's easy to replace it by an InterruptIn and fall() mode on a real button
00044 void fake_button_press() {
00045     int v = button_res->get_value_int() + 1;
00046 
00047     button_res->set_value(v);
00048 
00049     printf("Simulated button clicked %d times\n", v);
00050 }
00051 
00052 /**
00053  * PUT handler
00054  * @param resource The resource that triggered the callback
00055  * @param newValue Updated value for the resource
00056  */
00057 void pattern_updated(MbedCloudClientResource *resource, m2m::String newValue) {
00058     printf("PUT received, new value: %s\n", newValue.c_str());
00059 }
00060 
00061 /**
00062  * POST handler
00063  * @param resource The resource that triggered the callback
00064  * @param buffer If a body was passed to the POST function, this contains the data.
00065  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00066  * @param size Size of the body
00067  */
00068 void blink_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
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     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("Connected to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00106 }
00107 
00108 int main(void) {
00109     printf("Starting Simple Pelion Device Management Client example\n");
00110     printf("Connecting to the network...\n");
00111 
00112     net = CellularBase::get_default_instance();
00113 
00114     /* Set Pin code for SIM card */
00115     net->set_sim_pin(MBED_CONF_APP_SIM_PIN_CODE);
00116 
00117     /* Set network credentials here, e.g., APN */
00118     net->set_credentials(MBED_CONF_APP_APN, MBED_CONF_APP_USERNAME, MBED_CONF_APP_PASSWORD);
00119 
00120     nsapi_error_t status = net->connect();
00121 
00122     if (status != NSAPI_ERROR_OK) {
00123         printf("Connecting to the network failed %d!\n", status);
00124         return -1;
00125     }
00126 
00127     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00128 
00129     // SimpleMbedCloudClient handles registering over LwM2M to Mbed Cloud
00130     SimpleMbedCloudClient client(net, bd, &fs);
00131     int client_status = client.init();
00132     if (client_status != 0) {
00133         printf("Pelion Client initialization failed (%d)\n", client_status);
00134         return -1;
00135     }
00136 
00137     // Creating resources, which can be written or read from the cloud
00138     button_res = client.create_resource("3200/0/5501", "button_count");
00139     button_res->set_value(0);
00140     button_res->methods(M2MMethod::GET);
00141     button_res->observable(true);
00142     button_res->attach_notification_callback(button_callback);
00143 
00144     pattern_res = client.create_resource("3201/0/5853", "blink_pattern");
00145     pattern_res->set_value("500:500:500:500:500:500:500:500");
00146     pattern_res->methods(M2MMethod::GET | M2MMethod::PUT);
00147     pattern_res->attach_put_callback(pattern_updated);
00148 
00149     MbedCloudClientResource *blink_res = client.create_resource("3201/0/5850", "blink_action");
00150     blink_res->methods(M2MMethod::POST);
00151     blink_res->attach_post_callback(blink_callback);
00152 
00153     printf("Initialized Pelion Client. Registering...\n");
00154 
00155     // Callback that fires when registering is complete
00156     client.on_registered(&registered);
00157 
00158     // Register with Mbed Cloud
00159     client.register_and_connect();
00160 
00161     // Placeholder for callback to update local resource when GET comes.
00162     // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00163     Ticker timer;
00164     timer.attach(eventQueue.event(&fake_button_press), 5.0);
00165 
00166     // You can easily run the eventQueue in a separate thread if required
00167     eventQueue.dispatch_forever();
00168 }
00169 #endif