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 "LittleFileSystem.h"
00023 
00024 // Default network interface object. Don't forget to change the WiFi SSID/password in mbed_app.json if you're using WiFi.
00025 NetworkInterface *net;
00026 
00027 // Default block device available on the target board
00028 BlockDevice* bd = BlockDevice::get_default_instance();
00029 SlicingBlockDevice sd(bd, 0, 2*1024*1024);
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 and for resetting the storage
00040 InterruptIn button(BUTTON1);
00041 // Default LED to use for PUT/POST example
00042 DigitalOut led(LED1, 1);
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 
00052 
00053 //static DevI2C devI2c(PB_11,PB_10);
00054 static DigitalOut shutdown_pin(PC_6);
00055 // Temperature reading from microcontroller
00056 AnalogIn adc_temp(ADC_TEMP);
00057 // Voltage reference reading from microcontroller
00058 AnalogIn adc_vref(ADC_VREF);
00059 
00060 // Declaring pointers for access to Pelion Client resources outside of main()
00061 MbedCloudClientResource *res_button;
00062 MbedCloudClientResource *res_led;
00063 
00064 // Additional resources for sensor readings
00065 #ifdef SEND_ALL_SENSORS
00066 MbedCloudClientResource *res_adc_temp;
00067 MbedCloudClientResource *res_adc_voltage;
00068 #endif /* SEND_ALL_SENSORS */
00069 
00070 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00071 // 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
00072 EventQueue eventQueue;
00073 
00074 // When the device is registered, this variable will be used to access various useful information, like device ID etc.
00075 static const ConnectorClientEndpointInfo* endpointInfo;
00076 
00077 /**
00078  * PUT handler
00079  * @param resource The resource that triggered the callback
00080  * @param newValue Updated value for the resource
00081  */
00082 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
00083     printf("*** PUT received, new value: %s                             \n", newValue.c_str());
00084     led = atoi(newValue.c_str());
00085 }
00086 
00087 /**
00088  * POST handler
00089  * @param resource The resource that triggered the callback
00090  * @param buffer If a body was passed to the POST function, this contains the data.
00091  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00092  * @param size Size of the body
00093  */
00094 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
00095     printf("*** POST received (length %u). Payload: ", size);
00096     for (size_t ix = 0; ix < size; ix++) {
00097         printf("%02x ", buffer[ix]);
00098     }
00099     printf("\n");
00100 }
00101 
00102 /**
00103  * Button function triggered by the physical button press.
00104  */
00105 void button_press() {
00106     int v = res_button->get_value_int() + 1;
00107     res_button->set_value(v);
00108     printf("*** Button clicked %d times                                 \n", v);
00109 }
00110 
00111 /**
00112  * Notification callback handler
00113  * @param resource The resource that triggered the callback
00114  * @param status The delivery status of the notification
00115  */
00116 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
00117     printf("*** Button notification, status %s (%d)                     \n", MbedCloudClientResource::delivery_status_to_string(status), status);
00118 }
00119 
00120 /**
00121  * Registration callback handler
00122  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00123  */
00124 void registered(const ConnectorClientEndpointInfo *endpoint) {
00125     printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00126     endpointInfo = endpoint;
00127 }
00128 
00129 /**
00130  * Initialize sensors
00131  */
00132 void sensors_init() {
00133 
00134     printf ("\nSensors configuration:\n");
00135     // Initialize sensors
00136 
00137     // Call sensors enable routines
00138 
00139     printf("\n"); ;
00140 }
00141 
00142 /**
00143  * Update sensors and report their values.
00144  * This function is called periodically.
00145  */
00146 void sensors_update() {
00147     float temp3_value, volt_value = 0.0;
00148 
00149     temp3_value = adc_temp.read()*100;
00150     volt_value = adc_vref.read();
00151 
00152     printf("                                                             \n");
00153     printf("ADC temp: %5.4f C,  vref: %5.4f V         \n", temp3_value, volt_value);
00154 
00155     if (endpointInfo) {
00156 #ifdef SEND_ALL_SENSORS
00157         res_adc_temp->set_value(temp3_value);
00158         res_adc_voltage->set_value(volt_value);
00159 #endif /* SEND_ALL_SENSORS */
00160     }
00161 }
00162 
00163 int main(void) {
00164     printf("\nStarting Simple Pelion Device Management Client example\n");
00165 
00166     int storage_status = fs.mount(&sd);
00167     if (storage_status != 0) {
00168         printf("Storage mounting failed.\n");
00169     }
00170     // If the User button is pressed ons start, then format storage.
00171     bool btn_pressed = (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE);
00172     if (btn_pressed) {
00173         printf("User button is pushed on start...\n");
00174     }
00175 
00176     if (storage_status || btn_pressed) {
00177         printf("Formatting the storage...\n");
00178         int storage_status = StorageHelper::format(&fs, &sd);
00179         if (storage_status != 0) {
00180             printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
00181         }
00182     } else {
00183         printf("You can hold the user button during boot to format the storage and change the device identity.\n");
00184     }
00185 
00186     sensors_init();
00187 
00188     // Connect to the internet (DHCP is expected to be on)
00189     printf("Connecting to the network using Wifi...\n");
00190     net = NetworkInterface::get_default_instance();
00191 
00192     nsapi_error_t net_status = -1;
00193     for (int tries = 0; tries < 3; tries++) {
00194         net_status = net->connect();
00195         if (net_status == NSAPI_ERROR_OK) {
00196             break;
00197         } else {
00198             printf("Unable to connect to network. Retrying...\n");
00199         }
00200     }
00201 
00202     if (net_status != NSAPI_ERROR_OK) {
00203         printf("ERROR: Connecting to the network failed (%d)!\n", net_status);
00204         return -1;
00205     }
00206 
00207     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00208 
00209     printf("Initializing Pelion Device Management Client...\n");
00210 
00211     // SimpleMbedCloudClient handles registering over LwM2M to Pelion DM
00212     SimpleMbedCloudClient client(net, bd, &fs);
00213     int client_status = client.init();
00214     if (client_status != 0) {
00215         printf("ERROR: Pelion Client initialization failed (%d)\n", client_status);
00216         return -1;
00217     }
00218 
00219     // Creating resources, which can be written or read from the cloud
00220     res_button = client.create_resource("3200/0/5501", "Button Count");
00221     res_button->set_value(0);
00222     res_button->methods(M2MMethod::GET);
00223     res_button->observable(true);
00224     res_button->attach_notification_callback(button_callback);
00225 
00226     res_led = client.create_resource("3201/0/5853", "LED State");
00227     res_led->set_value(1);
00228     res_led->methods(M2MMethod::GET | M2MMethod::PUT);
00229     res_led->attach_put_callback(put_callback);
00230 
00231 #ifdef SEND_ALL_SENSORS
00232     // Sensor resources
00233     res_adc_temp = client.create_resource("3303/2/5700", "Temperature ADC (C)");
00234     res_adc_temp->set_value(0);
00235     res_adc_temp->methods(M2MMethod::GET);
00236     res_adc_temp->observable(true);
00237 
00238     res_adc_voltage = client.create_resource("3316/0/5700", "Voltage");
00239     res_adc_voltage->set_value(0);
00240     res_adc_voltage->methods(M2MMethod::GET);
00241     res_adc_voltage->observable(true);
00242 
00243 #endif /* SEND_ALL_SENSORS */
00244 
00245     printf("Initialized Pelion Client. Registering...\n");
00246 
00247     // Callback that fires when registering is complete
00248     client.on_registered(&registered);
00249 
00250     // Register with Pelion DM
00251     client.register_and_connect();
00252 
00253     int i = 600; // wait up 60 seconds before attaching sensors and button events
00254     while (i-- > 0 && !client.is_client_registered()) {
00255         wait_ms(100);
00256     }
00257 
00258     button.fall(eventQueue.event(&button_press));
00259 
00260     // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00261     Ticker timer;
00262     timer.attach(eventQueue.event(&sensors_update), SENSORS_POLL_INTERVAL);
00263 
00264     // You can easily run the eventQueue in a separate thread if required
00265     eventQueue.dispatch_forever();
00266 }
00267 
00268 #endif