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 #include<math.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;
00027 
00028 // Default block device available on the target board
00029 BlockDevice* bd = BlockDevice::get_default_instance();
00030 SlicingBlockDevice sd(bd, 0, 2*1024*1024);
00031 
00032 #if COMPONENT_SD || COMPONENT_NUSD
00033 // Use FATFileSystem for SD card type blockdevices
00034 FATFileSystem fs("fs");
00035 #else
00036 // Use LittleFileSystem for non-SD block devices to enable wear leveling and other functions
00037 LittleFileSystem fs("fs");
00038 #endif
00039 
00040 // Default User button for GET example and for resetting the storage
00041 InterruptIn button(BUTTON1);
00042 // Default LED to use for PUT/POST example
00043 DigitalOut led(LED1, 1);
00044 
00045 // How often to fetch sensor data (in seconds)
00046 #define SENSORS_POLL_INTERVAL 3.0
00047 
00048 // Send all sensor data or just limited (useful for when running out of memory)
00049 #define SEND_ALL_SENSORS
00050 
00051 // Sensors related includes and initialization
00052 #include "HTS221Sensor.h" //humidity and temperature
00053 
00054 static DevI2C devI2c(PB_11,PB_10);
00055 static HTS221Sensor sen_hum_temp(&devI2c);
00056 //static LSM6DSLSensor sen_acc_gyro(&devI2c,LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW,PD_11);
00057 
00058 static DigitalOut shutdown_pin(PC_6);
00059 
00060 // Temperature reading from microcontroller
00061 AnalogIn adc_temp(ADC_TEMP);
00062 // Voltage reference reading from microcontroller
00063 AnalogIn adc_vref(ADC_VREF);
00064 
00065 // Declaring pointers for access to Pelion Client resources outside of main()
00066 MbedCloudClientResource *res_button;
00067 MbedCloudClientResource *res_led;
00068 
00069 // Additional resources for sensor readings
00070 #ifdef SEND_ALL_SENSORS
00071 MbedCloudClientResource *res_temperature;
00072 
00073 
00074 #endif /* SEND_ALL_SENSORS */
00075 
00076 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00077 // 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
00078 EventQueue eventQueue;
00079 
00080 // When the device is registered, this variable will be used to access various useful information, like device ID etc.
00081 static const ConnectorClientEndpointInfo* endpointInfo;
00082 
00083 /**
00084  * PUT handler
00085  * @param resource The resource that triggered the callback
00086  * @param newValue Updated value for the resource
00087  */
00088 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
00089     printf("*** PUT received, new value: %s                             \n", newValue.c_str());
00090     led = atoi(newValue.c_str());
00091 }
00092 
00093 /**
00094  * POST handler
00095  * @param resource The resource that triggered the callback
00096  * @param buffer If a body was passed to the POST function, this contains the data.
00097  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00098  * @param size Size of the body
00099  */
00100 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
00101     printf("*** POST received (length %u). Payload: ", size);
00102     for (size_t ix = 0; ix < size; ix++) {
00103         printf("%02x ", buffer[ix]);
00104     }
00105     printf("\n");
00106 }
00107 
00108 /**
00109  * Button function triggered by the physical button press.
00110  */
00111 void button_press() {
00112     int v = res_button->get_value_int() + 1;
00113     res_button->set_value(v);
00114     printf("*** Button clicked %d times                                 \n", v);
00115 }
00116 // Called everytime a new character goes into
00117 // the RX buffer. Test that character for \n
00118 // Note, rxGetLastChar() gets the last char that
00119 // we received but it does NOT remove it from
00120 // the RX buffer.
00121 
00122 /**
00123  * Notification callback handler
00124  * @param resource The resource that triggered the callback
00125  * @param status The delivery status of the notification
00126  */
00127 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
00128     printf("*** Button notification, status %s (%d)                     \n", MbedCloudClientResource::delivery_status_to_string(status), status);
00129 }
00130 
00131 /**
00132  * Registration callback handler
00133  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00134  */
00135 void registered(const ConnectorClientEndpointInfo *endpoint) {
00136     printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00137     endpointInfo = endpoint;
00138 }
00139 
00140 /**
00141  * Initialize sensors
00142  */
00143 void sensors_init() {
00144     uint8_t id1, id2;
00145     printf ("\nSensors configuration:\n");
00146     // Initialize sensors
00147     sen_hum_temp.init(NULL);
00148 
00149     /// Call sensors enable routines
00150     sen_hum_temp.enable();
00151     
00152     sen_hum_temp.read_id(&id1);
00153 
00154     printf("HTS221  humidity & temperature    = 0x%X\n", id1);
00155     printf("\n"); ;
00156 }
00157 
00158 /**
00159  * Update sensors and report their values.
00160  * This function is called periodically.
00161  */
00162 void sensors_update() {
00163     float temp1_value = 0.0;
00164     //float temp3_value = 0.0;
00165     
00166     sen_hum_temp.get_temperature(&temp1_value);
00167       
00168     printf("%2.2f ^1",temp1_value);   
00169     printf("\n");
00170     
00171     wait_us(4000);//Wait until the loop_timer reaches 4000us (250Hz) before starting the next loop
00172     
00173     if (endpointInfo) {
00174 #ifdef SEND_ALL_SENSORS
00175         res_temperature->set_value(temp1_value);
00176         
00177 #endif /* SEND_ALL_SENSORS */
00178     }
00179 }
00180 
00181 int main(void) 
00182 {
00183     printf("\nStarting Simple Pelion Device Management Client example\n");
00184 
00185     int storage_status = fs.mount(&sd);
00186     if (storage_status != 0) {
00187         printf("Storage mounting failed.\n");
00188     }
00189     // If the User button is pressed ons start, then format storage.
00190     bool btn_pressed = (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE);
00191     if (btn_pressed) {
00192         printf("User button is pushed on start...\n");
00193     }
00194 
00195     if (storage_status || btn_pressed) {
00196         printf("Formatting the storage...\n");
00197         int storage_status = StorageHelper::format(&fs, &sd);
00198         if (storage_status != 0) {
00199             printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
00200         }
00201     } else {
00202         printf("You can hold the user button during boot to format the storage and change the device identity.\n");
00203     }
00204 
00205     sensors_init();
00206 
00207     // Connect to the internet (DHCP is expected to be on)
00208     printf("Connecting to the network using Wifi...\n");
00209     net = NetworkInterface::get_default_instance();
00210 
00211     nsapi_error_t net_status = -1;
00212     for (int tries = 0; tries < 3; tries++) {
00213         net_status = net->connect();
00214         if (net_status == NSAPI_ERROR_OK) {
00215             break;
00216         } else {
00217             printf("Unable to connect to network. Retrying...\n");
00218         }
00219     }
00220 
00221     if (net_status != NSAPI_ERROR_OK) {
00222         printf("ERROR: Connecting to the network failed (%d)!\n", net_status);
00223         return -1;
00224     }
00225 
00226     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00227 
00228     printf("Initializing Pelion Device Management Client...\n");
00229 
00230     // SimpleMbedCloudClient handles registering over LwM2M to Pelion DM
00231     SimpleMbedCloudClient client(net, bd, &fs);
00232     int client_status = client.init();
00233     if (client_status != 0) {
00234         printf("ERROR: Pelion Client initialization failed (%d)\n", client_status);
00235         return -1;
00236     }
00237 
00238     // Creating resources, which can be written or read from the cloud
00239     res_button = client.create_resource("3200/0/5501", "Button Count");
00240     res_button->set_value(0);
00241     res_button->methods(M2MMethod::GET);
00242     res_button->observable(true);
00243     res_button->attach_notification_callback(button_callback);
00244 
00245     res_led = client.create_resource("3201/0/5853", "LED State");
00246     res_led->set_value(1);
00247     res_led->methods(M2MMethod::GET | M2MMethod::PUT);
00248     res_led->attach_put_callback(put_callback);
00249 
00250 #ifdef SEND_ALL_SENSORS
00251     // Sensor resources
00252     res_temperature = client.create_resource("3303/0/5700", "Temperature HTS221 (C)");
00253     res_temperature->set_value(0);
00254     res_temperature->methods(M2MMethod::GET);
00255     res_temperature->observable(true);
00256     
00257 #endif /* SEND_ALL_SENSORS */
00258 
00259     printf("Initialized Pelion Client. Registering...\n");
00260 
00261     // Callback that fires when registering is complete
00262     client.on_registered(&registered);
00263 
00264     // Register with Pelion DM
00265     client.register_and_connect();
00266 
00267     int i = 600; // wait up 60 seconds before attaching sensors and button events
00268     while (i-- > 0 && !client.is_client_registered()) {
00269         wait_ms(100);
00270     }
00271     
00272     button.fall(eventQueue.event(&button_press));
00273 
00274     // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00275     Ticker timer;
00276     timer.attach(eventQueue.event(&sensors_update), SENSORS_POLL_INTERVAL);
00277 
00278     // You can easily run the eventQueue in a separate thread if required
00279     eventQueue.dispatch_forever();
00280 }
00281 
00282 #endif