Diff: share/object_mbed_temperature.cpp

Revision:

16:31c387e94b6d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/share/object_mbed_temperature.cpp	Thu May 11 12:40:25 2017 +0000
@@ -0,0 +1,134 @@
+#include "liblwm2m.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#define LWM2M_TEMPERATURE_OBJECT_ID   3303
+#define LWM2M_TEMPERATURE_SENSOR_UNITS  "Celsius"
+#define LWM2M_TEMPERATURE_LOCATION      "Shenzhen,China" 
+
+
+#define RES_SENSOR_MIN          5601
+#define RES_SENSOR_MAX          5602
+#define RES_SENSOR_MIN_RANGE    5603
+#define RES_SENSOR_MAX_RANGE    5604
+#define RES_SENSOR_RESET        5605
+#define RES_SENSOR_VALUE        5700
+#define RES_SENSOR_UNITS        5701
+#define RES_SENSOR_LOCATION     5702
+
+void get_temperature(float *temp);
+                             
+static uint8_t prv_set_value(lwm2m_data_t * dataP) 
+{
+    float temp =0;
+    // a simple switch structure is used to respond at the specified resource asked
+    switch (dataP->id) {
+    case RES_SENSOR_VALUE:
+        get_temperature(&temp);
+        lwm2m_data_encode_float(temp, dataP);
+        return COAP_205_CONTENT ;
+
+    case RES_SENSOR_UNITS:
+        lwm2m_data_encode_string(LWM2M_TEMPERATURE_SENSOR_UNITS, dataP);
+        return COAP_205_CONTENT ;
+
+    case RES_SENSOR_MIN:
+    case RES_SENSOR_MAX:
+    case RES_SENSOR_RESET:   
+        lwm2m_data_encode_string("Not Support!", dataP);
+        return COAP_205_CONTENT ;    
+    case RES_SENSOR_MIN_RANGE:
+        lwm2m_data_encode_float(-55, dataP);
+        return COAP_205_CONTENT ;
+    case RES_SENSOR_MAX_RANGE:
+        lwm2m_data_encode_float(125, dataP);
+        return COAP_205_CONTENT ;          
+    //case RES_SENSOR_LOCATION:
+    //    lwm2m_data_encode_string(LWM2M_TEMPERATURE_LOCATION, dataP);
+    //    return COAP_205_CONTENT ;  
+    default:
+        return COAP_404_NOT_FOUND ;
+    }
+}
+
+static uint8_t prv_temperature_read(uint16_t instanceId, int * numDataP, lwm2m_data_t ** dataArrayP, lwm2m_object_t * objectP) {
+    uint8_t result;
+    int i;
+
+    // this is a single instance object
+    if (instanceId != 0) {
+        return COAP_404_NOT_FOUND ;
+    }
+
+    // is the server asking for the full object ?
+    if (*numDataP == 0) {
+
+        uint16_t resList[] = { RES_SENSOR_VALUE, RES_SENSOR_UNITS, };
+        
+        int nbRes = sizeof(resList) / sizeof(uint16_t);
+
+        *dataArrayP = lwm2m_data_new(nbRes);
+        if (*dataArrayP == NULL)
+            return COAP_500_INTERNAL_SERVER_ERROR ;
+            
+        *numDataP = nbRes;
+        for (i = 0; i < nbRes; i++) {
+            (*dataArrayP)[i].id = resList[i];
+        }
+    }
+
+    i = 0;
+    do {
+        result = prv_set_value((*dataArrayP) + i);
+        i++;
+    } while (i < *numDataP && result == COAP_205_CONTENT );
+
+    return result;
+}
+
+
+lwm2m_object_t * get_object_temperature() {
+    /*
+     * The get_object_tem function create the object itself and return a pointer to the structure that represent it.
+     */
+    lwm2m_object_t * temperatureObj = (lwm2m_object_t *) lwm2m_malloc(sizeof(lwm2m_object_t));
+
+    if (NULL != temperatureObj) {
+        memset(temperatureObj, 0, sizeof(lwm2m_object_t));
+
+        /*
+         * It assigns his unique ID
+         * The 3313 is the standard ID for the mandatory object "IPSO Accelerometer".
+         */
+        temperatureObj->objID = LWM2M_TEMPERATURE_OBJECT_ID;
+
+        /*
+         * there is only one instance of accelerometer on the Application Board for mbed NXP LPC1768.
+         *
+         */
+        temperatureObj->instanceList = (lwm2m_list_t *) lwm2m_malloc(sizeof(lwm2m_list_t));
+        if (NULL != temperatureObj->instanceList) {
+            memset(temperatureObj->instanceList, 0, sizeof(lwm2m_list_t));
+        } else {
+            lwm2m_free(temperatureObj);
+            return NULL;
+        }
+
+        /*
+         * And the private function that will access the object.
+         * Those function will be called when a read/write/execute query is made by the server. In fact the library don't need to
+         * know the resources of the object, only the server does.
+         */
+        temperatureObj->readFunc = prv_temperature_read;
+        temperatureObj->writeFunc = NULL;
+        temperatureObj->executeFunc = NULL;
+        temperatureObj->userData = NULL;
+        
+
+    }
+
+    return temperatureObj;
+}