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pelion-example-common
Mbed OS Device Management example for various ST boards.
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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"); 00034 #else 00035 // Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions 00036 LittleFileSystem fs("fs"); 00037 #endif 00038 00039 // Default User button for GET example 00040 InterruptIn button(BUTTON1); 00041 // Default LED to use for PUT/POST example 00042 DigitalOut led(LED1, 0); 00043 00044 // How often to fetch sensor data (in seconds) 00045 #define SENSORS_POLL_INTERVAL 3.0 00046 00047 // Send all sensor data or just limited (useful for when running out of memory) 00048 #define SEND_ALL_SENSORS 00049 00050 // Sensors related includes and initialization 00051 // Temperature reading from microcontroller 00052 AnalogIn adc_temp(ADC_TEMP); 00053 // Voltage reference reading from microcontroller 00054 AnalogIn adc_vref(ADC_VREF); 00055 00056 // Declaring pointers for access to Pelion Device Management Client resources outside of main() 00057 MbedCloudClientResource *res_button; 00058 MbedCloudClientResource *res_led; 00059 MbedCloudClientResource *res_post; 00060 00061 // Additional resources for sensor readings 00062 #ifdef SEND_ALL_SENSORS 00063 MbedCloudClientResource *res_temperature; 00064 MbedCloudClientResource *res_voltage; 00065 #endif /* SEND_ALL_SENSORS */ 00066 00067 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads) 00068 // 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 00069 EventQueue eventQueue; 00070 00071 // When the device is registered, this variable will be used to access various useful information, like device ID etc. 00072 static const ConnectorClientEndpointInfo* endpointInfo; 00073 00074 /** 00075 * PUT handler - sets the value of the built-in LED 00076 * @param resource The resource that triggered the callback 00077 * @param newValue Updated value for the resource 00078 */ 00079 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) { 00080 printf("PUT received. New value: %s\n", newValue.c_str()); 00081 led = atoi(newValue.c_str()); 00082 } 00083 00084 /** 00085 * POST handler - prints the content of the payload 00086 * @param resource The resource that triggered the callback 00087 * @param buffer If a body was passed to the POST function, this contains the data. 00088 * Note that the buffer is deallocated after leaving this function, so copy it if you need it longer. 00089 * @param size Size of the body 00090 */ 00091 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) { 00092 printf("POST received (length %u). Payload: ", size); 00093 for (size_t ix = 0; ix < size; ix++) { 00094 printf("%02x ", buffer[ix]); 00095 } 00096 printf("\n"); 00097 } 00098 00099 /** 00100 * Button handler 00101 * This function will be triggered either by a physical button press or by a ticker every 5 seconds (see below) 00102 */ 00103 void button_press() { 00104 int v = res_button->get_value_int() + 1; 00105 res_button->set_value(v); 00106 printf("Button clicked %d times\n", v); 00107 } 00108 00109 /** 00110 * Notification callback handler 00111 * @param resource The resource that triggered the callback 00112 * @param status The delivery status of the notification 00113 */ 00114 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) { 00115 printf("Button notification, status %s (%d)\n", MbedCloudClientResource::delivery_status_to_string(status), status); 00116 } 00117 00118 /** 00119 * Registration callback handler 00120 * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal) 00121 * When the device is registered, this variable will be used to access various useful information, like device ID etc. 00122 */ 00123 void registered(const ConnectorClientEndpointInfo *endpoint) { 00124 printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str()); 00125 endpointInfo = endpoint; 00126 } 00127 00128 /** 00129 * Update sensors and report their values. 00130 * This function is called periodically. 00131 */ 00132 void sensors_update() { 00133 float temp = adc_temp.read()*100; 00134 float vref = adc_vref.read(); 00135 printf("ADC temp: %6.4f C, vref: %6.4f %%\r\n", temp, vref); 00136 if (endpointInfo) { 00137 res_temperature->set_value(temp); 00138 res_voltage->set_value(vref); 00139 } 00140 } 00141 00142 00143 int main(void) { 00144 printf("\nStarting Simple Pelion Device Management Client example\n"); 00145 00146 int storage_status = fs.mount(bd); 00147 if (storage_status != 0) { 00148 printf("Storage mounting failed.\n"); 00149 } 00150 // If the User button is pressed ons start, then format storage. 00151 bool btn_pressed = (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE); 00152 if (btn_pressed) { 00153 printf("User button is pushed on start...\n"); 00154 } 00155 00156 if (storage_status || btn_pressed) { 00157 printf("Formatting the storage...\n"); 00158 int storage_status = StorageHelper::format(&fs, bd); 00159 if (storage_status != 0) { 00160 printf("ERROR: Failed to reformat the storage (%d).\n", storage_status); 00161 } 00162 } else { 00163 printf("You can hold the user button during boot to format the storage and change the device identity.\n"); 00164 } 00165 00166 // Connect to the Internet (DHCP is expected to be on) 00167 printf("Connecting to the network using the default network interface...\n"); 00168 net = NetworkInterface::get_default_instance(); 00169 00170 nsapi_error_t net_status = NSAPI_ERROR_NO_CONNECTION; 00171 while ((net_status = net->connect()) != NSAPI_ERROR_OK) { 00172 printf("Unable to connect to network (%d). Retrying...\n", net_status); 00173 } 00174 00175 printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address()); 00176 00177 printf("Initializing Pelion Device Management Client...\n"); 00178 00179 // SimpleMbedCloudClient handles registering over LwM2M to Pelion Device Management 00180 SimpleMbedCloudClient client(net, bd, &fs); 00181 int client_status = client.init(); 00182 if (client_status != 0) { 00183 printf("Pelion Client initialization failed (%d)\n", client_status); 00184 return -1; 00185 } 00186 00187 // Creating resources, which can be written or read from the cloud 00188 res_button = client.create_resource("3200/0/5501", "Button Count"); 00189 res_button->set_value(0); 00190 res_button->methods(M2MMethod::GET); 00191 res_button->observable(true); 00192 res_button->attach_notification_callback(button_callback); 00193 00194 res_led = client.create_resource("3201/0/5853", "LED State"); 00195 res_led->set_value(led.read()); 00196 res_led->methods(M2MMethod::GET | M2MMethod::PUT); 00197 res_led->attach_put_callback(put_callback); 00198 00199 res_post = client.create_resource("3300/0/5605", "Execute Function"); 00200 res_post->methods(M2MMethod::POST); 00201 res_post->attach_post_callback(post_callback); 00202 00203 // Sensor resources 00204 res_temperature = client.create_resource("3303/0/5700", "Temperature (C)"); 00205 res_temperature->set_value(0); 00206 res_temperature->methods(M2MMethod::GET); 00207 res_temperature->observable(true); 00208 00209 res_voltage = client.create_resource("3316/0/5700", "Voltage"); 00210 res_voltage->set_value(0); 00211 res_voltage->methods(M2MMethod::GET); 00212 res_voltage->observable(true); 00213 00214 printf("Initialized Pelion Device Management Client. Registering...\n"); 00215 00216 // Callback that fires when registering is complete 00217 client.on_registered(®istered); 00218 00219 // Register with Pelion DM 00220 client.register_and_connect(); 00221 00222 // The button fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations 00223 button.fall(eventQueue.event(&button_press)); 00224 printf("Press the user button to increment the LwM2M resource value...\n"); 00225 00226 Ticker timer; 00227 timer.attach(eventQueue.event(&sensors_update), SENSORS_POLL_INTERVAL); 00228 00229 // You can easily run the eventQueue in a separate thread if required 00230 eventQueue.dispatch_forever(); 00231 } 00232 00233 #endif /* MBED_TEST_MODE */
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