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 #include "LPS22HBSensor.h"  //Barometer
00054 
00055 static DevI2C devI2c(PB_11,PB_10);
00056 static HTS221Sensor sen_hum_temp(&devI2c);
00057 static LPS22HBSensor sen_press_temp(&devI2c);
00058 //static LSM6DSLSensor sen_acc_gyro(&devI2c,LSM6DSL_ACC_GYRO_I2C_ADDRESS_LOW,PD_11);
00059 
00060 static DigitalOut shutdown_pin(PC_6);
00061 
00062 // Temperature reading from microcontroller
00063 AnalogIn adc_temp(ADC_TEMP);
00064 // Voltage reference reading from microcontroller
00065 AnalogIn adc_vref(ADC_VREF);
00066 
00067 // Declaring pointers for access to Pelion Client resources outside of main()
00068 MbedCloudClientResource *res_button;
00069 MbedCloudClientResource *res_led;
00070 
00071 // Additional resources for sensor readings
00072 #ifdef SEND_ALL_SENSORS
00073 MbedCloudClientResource *res_humidity;
00074 MbedCloudClientResource *res_pressure;
00075 MbedCloudClientResource *res_temperature;
00076 
00077 
00078 #endif /* SEND_ALL_SENSORS */
00079 
00080 // An event queue is a very useful structure to debounce information between contexts (e.g. ISR and normal threads)
00081 // 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
00082 EventQueue eventQueue;
00083 
00084 // When the device is registered, this variable will be used to access various useful information, like device ID etc.
00085 static const ConnectorClientEndpointInfo* endpointInfo;
00086 
00087 /**
00088  * PUT handler
00089  * @param resource The resource that triggered the callback
00090  * @param newValue Updated value for the resource
00091  */
00092 void put_callback(MbedCloudClientResource *resource, m2m::String newValue) {
00093     printf("*** PUT received, new value: %s                             \n", newValue.c_str());
00094     led = atoi(newValue.c_str());
00095 }
00096 
00097 /**
00098  * POST handler
00099  * @param resource The resource that triggered the callback
00100  * @param buffer If a body was passed to the POST function, this contains the data.
00101  *               Note that the buffer is deallocated after leaving this function, so copy it if you need it longer.
00102  * @param size Size of the body
00103  */
00104 void post_callback(MbedCloudClientResource *resource, const uint8_t *buffer, uint16_t size) {
00105     printf("*** POST received (length %u). Payload: ", size);
00106     for (size_t ix = 0; ix < size; ix++) {
00107         printf("%02x ", buffer[ix]);
00108     }
00109     printf("\n");
00110 }
00111 
00112 /**
00113  * Button function triggered by the physical button press.
00114  */
00115 void button_press() {
00116     int v = res_button->get_value_int() + 1;
00117     res_button->set_value(v);
00118     printf("*** Button clicked %d times                                 \n", v);
00119 }
00120 // Called everytime a new character goes into
00121 // the RX buffer. Test that character for \n
00122 // Note, rxGetLastChar() gets the last char that
00123 // we received but it does NOT remove it from
00124 // the RX buffer.
00125 
00126 /**
00127  * Notification callback handler
00128  * @param resource The resource that triggered the callback
00129  * @param status The delivery status of the notification
00130  */
00131 void button_callback(MbedCloudClientResource *resource, const NoticationDeliveryStatus status) {
00132     printf("*** Button notification, status %s (%d)                     \n", MbedCloudClientResource::delivery_status_to_string(status), status);
00133 }
00134 
00135 /**
00136  * Registration callback handler
00137  * @param endpoint Information about the registered endpoint such as the name (so you can find it back in portal)
00138  */
00139 void registered(const ConnectorClientEndpointInfo *endpoint) {
00140     printf("Registered to Pelion Device Management. Endpoint Name: %s\n", endpoint->internal_endpoint_name.c_str());
00141     endpointInfo = endpoint;
00142 }
00143 
00144 /**
00145  * Initialize sensors
00146  */
00147 void sensors_init() {
00148     uint8_t id1, id2;
00149     printf ("\nSensors configuration:\n");
00150     // Initialize sensors
00151     sen_hum_temp.init(NULL);
00152     sen_press_temp.init(NULL);
00153 
00154     /// Call sensors enable routines
00155     sen_hum_temp.enable();
00156     sen_press_temp.enable();
00157     
00158     sen_hum_temp.read_id(&id1);
00159     sen_press_temp.read_id(&id2);
00160 
00161     printf("HTS221  humidity & temperature    = 0x%X\n", id1);
00162     printf("LPS22HB pressure & temperature    = 0x%X\n", id2);
00163     printf("\n"); ;
00164 }
00165 
00166 /**
00167  * Update sensors and report their values.
00168  * This function is called periodically.
00169  */
00170 void sensors_update() {
00171     float humid_value, pressure_value = 0.0;
00172     float temp1_value = 0.0;
00173     //float temp3_value = 0.0;
00174     
00175     sen_hum_temp.get_humidity(&humid_value);
00176     sen_hum_temp.get_temperature(&temp1_value);
00177     sen_press_temp.get_pressure(&pressure_value);
00178     //temp3_value = adc_temp.read()*100;
00179     //sen_acc_gyro.get_g_axes(g_axes);
00180       
00181     printf("%2.2f^%2.1f^%3.2f",temp1_value,humid_value,pressure_value);   
00182     printf("\n");
00183     
00184     wait_us(4000);//Wait until the loop_timer reaches 4000us (250Hz) before starting the next loop
00185     
00186     if (endpointInfo) {
00187 #ifdef SEND_ALL_SENSORS
00188         res_humidity->set_value(humid_value);
00189         res_temperature->set_value(temp1_value);
00190         res_pressure->set_value(pressure_value);
00191         //res_adc_temp->set_value(temp3_value);
00192         
00193 #endif /* SEND_ALL_SENSORS */
00194     }
00195 }
00196 
00197 int main(void) 
00198 {
00199     printf("\nStarting Simple Pelion Device Management Client example\n");
00200 
00201     int storage_status = fs.mount(&sd);
00202     if (storage_status != 0) {
00203         printf("Storage mounting failed.\n");
00204     }
00205     // If the User button is pressed ons start, then format storage.
00206     bool btn_pressed = (button.read() == MBED_CONF_APP_BUTTON_PRESSED_STATE);
00207     if (btn_pressed) {
00208         printf("User button is pushed on start...\n");
00209     }
00210 
00211     if (storage_status || btn_pressed) {
00212         printf("Formatting the storage...\n");
00213         int storage_status = StorageHelper::format(&fs, &sd);
00214         if (storage_status != 0) {
00215             printf("ERROR: Failed to reformat the storage (%d).\n", storage_status);
00216         }
00217     } else {
00218         printf("You can hold the user button during boot to format the storage and change the device identity.\n");
00219     }
00220 
00221     sensors_init();
00222 
00223     // Connect to the internet (DHCP is expected to be on)
00224     printf("Connecting to the network using Wifi...\n");
00225     net = NetworkInterface::get_default_instance();
00226 
00227     nsapi_error_t net_status = -1;
00228     for (int tries = 0; tries < 3; tries++) {
00229         net_status = net->connect();
00230         if (net_status == NSAPI_ERROR_OK) {
00231             break;
00232         } else {
00233             printf("Unable to connect to network. Retrying...\n");
00234         }
00235     }
00236 
00237     if (net_status != NSAPI_ERROR_OK) {
00238         printf("ERROR: Connecting to the network failed (%d)!\n", net_status);
00239         return -1;
00240     }
00241 
00242     printf("Connected to the network successfully. IP address: %s\n", net->get_ip_address());
00243 
00244     printf("Initializing Pelion Device Management Client...\n");
00245 
00246     // SimpleMbedCloudClient handles registering over LwM2M to Pelion DM
00247     SimpleMbedCloudClient client(net, bd, &fs);
00248     int client_status = client.init();
00249     if (client_status != 0) {
00250         printf("ERROR: Pelion Client initialization failed (%d)\n", client_status);
00251         return -1;
00252     }
00253 
00254     // Creating resources, which can be written or read from the cloud
00255     res_button = client.create_resource("3200/0/5501", "Button Count");
00256     res_button->set_value(0);
00257     res_button->methods(M2MMethod::GET);
00258     res_button->observable(true);
00259     res_button->attach_notification_callback(button_callback);
00260 
00261     res_led = client.create_resource("3201/0/5853", "LED State");
00262     res_led->set_value(1);
00263     res_led->methods(M2MMethod::GET | M2MMethod::PUT);
00264     res_led->attach_put_callback(put_callback);
00265 
00266 #ifdef SEND_ALL_SENSORS
00267     // Sensor resources
00268     res_temperature = client.create_resource("3303/0/5700", "Temperature HTS221 (C)");
00269     res_temperature->set_value(0);
00270     res_temperature->methods(M2MMethod::GET);
00271     res_temperature->observable(true);
00272 
00273     res_humidity = client.create_resource("3304/0/5700", "Humidity");
00274     res_humidity->set_value(0);
00275     res_humidity->methods(M2MMethod::GET);
00276     res_humidity->observable(true);
00277 
00278     res_pressure = client.create_resource("3323/0/5700", "Pressure");
00279     res_pressure->set_value(0);
00280     res_pressure->methods(M2MMethod::GET);
00281     res_pressure->observable(true);
00282     
00283 #endif /* SEND_ALL_SENSORS */
00284 
00285     printf("Initialized Pelion Client. Registering...\n");
00286 
00287     // Callback that fires when registering is complete
00288     client.on_registered(&registered);
00289 
00290     // Register with Pelion DM
00291     client.register_and_connect();
00292 
00293     int i = 600; // wait up 60 seconds before attaching sensors and button events
00294     while (i-- > 0 && !client.is_client_registered()) {
00295         wait_ms(100);
00296     }
00297     
00298     button.fall(eventQueue.event(&button_press));
00299 
00300     // The timer fires on an interrupt context, but debounces it to the eventqueue, so it's safe to do network operations
00301     Ticker timer;
00302     timer.attach(eventQueue.event(&sensors_update), SENSORS_POLL_INTERVAL);
00303 
00304     // You can easily run the eventQueue in a separate thread if required
00305     eventQueue.dispatch_forever();
00306 }
00307 
00308 #endif