diff --git a/Project/applications/smartcities/main2.c b/Project/applications/smartcities/main2.c
index 2c21e1f..776cd0d 100644
--- a/Project/applications/smartcities/main2.c
+++ b/Project/applications/smartcities/main2.c
@@ -31,7 +31,7 @@ void initLibwismart(void)
 uint8_t connected=0;
 uint8_t timeout=0;
 uint8_t retries=0;
-uint8_t first_sensor=0;
+uint8_t sensors_length=0;
 
 void init_registry(void)
 {
@@ -91,64 +91,50 @@ void init_registry(void)
 void send_data(char** buffers[], uint32_t ind[], uint32_t sizes[], uint8_t sensors[])
 {
     int j;
-    for(j=0;j<TOTAL_SENSORS;j++)
+    for(j=0;j<sensors_length;j++)
     {   
-        if(sensors[j]!=0)
-        {
-            printf(" enviant buffer %d\r\n",j);
-            
-            // fem servir 085 de prova, però haurem de fer servir sensor_id[j]
-            char id[3];
-            sprintf(id,"%x",sensors[j]);
-            int ok=send(buffers[j],&ind[j],&sizes[j], mod.ID, id);
+        printf(" enviant buffer %d\r\n",j);
+        
+        // fem servir 085 de prova, però haurem de fer servir sensor_id[j]
+        char id[3];
+        sprintf(id,"%x",sensors[j]);
+        int ok=send(buffers[j],&ind[j],&sizes[j], mod.ID, id);
 
-            if(ok==JSON_COMM_ERROR)
-            {
-                printf("wismart is not connected\r\n");
-            }
-            else if( ok==JSON_OTHER_ERROR){
-                printf("some error ocurred\r\n");
-            }
-            else if(ok ==JSON_POST_OK){
-                printf(" send OK \r\n");
-            }
+        if(ok==JSON_COMM_ERROR)
+        {
+            printf("wismart is not connected\r\n");
+        }
+        else if( ok==JSON_OTHER_ERROR){
+            printf("some error ocurred\r\n");
+        }
+        else if(ok ==JSON_POST_OK){
+            printf(" send OK \r\n");
         }
     }
 }
 
 void put_buffers(char** buffers[],uint32_t ind[],uint32_t sizes[],char** cooked, uint8_t* sensors){
     int i;
-    for(i=0;i<TOTAL_SENSORS;i++){
-        if(sensors[i]!=0){
-            put_message(cooked[i], buffers[i] ,&ind[i],&sizes[i]);
-            chHeapFree(cooked[i]);
-        }
+    for(i=0;i<sensors_length;i++){ 
+        put_message(cooked[i], buffers[i] ,&ind[i],&sizes[i]);
+        chHeapFree(cooked[i]);
     }
 
 }
 char** timestamp_datas(char* value[],unsigned long timestamp, uint8_t* sensors){
     char** cooked_data;
-    cooked_data = (char**) chHeapAlloc(NULL,TOTAL_SENSORS * sizeof(char*));
+    cooked_data = (char**) chHeapAlloc(NULL,sensors_length * sizeof(char*));
     Date t=getDate(timestamp);
     int i;
-    for(i=0;i<TOTAL_SENSORS;i++){
-        if(sensors[i]!=0){
-            cooked_data[i]=timestamp_data(value[i], t);
-            chHeapFree(value[i]);
-        }
+    for(i=0;i<sensors_length;i++){
+        
+        cooked_data[i]=timestamp_data(value[i], t);
+        chHeapFree(value[i]);
+        
     }
     return cooked_data;
 }
 
-void first_sens(uint8_t* sensors){
-    int i;
-    for(i=0;i<TOTAL_SENSORS;i++){
-        if(sensors[i]!=0){
-            first_sensor=i;
-            break;
-        }
-    }
-}
 
 void wifi_connect(void)
 {
@@ -185,10 +171,11 @@ int main(void)
 	libwismart_EnableBsdSocketAPI();
 
     //Escanea los sensores -> retorna un vector con las direcciones en cada posición del vector, si la posición del vector retorna un cero -> no existe el sensor
+    
     uint8_t sensors[TOTAL_SENSORS];
     char* valueSensors[TOTAL_SENSORS];
     I2C_scan(sensors);
-    first_sens(sensors);
+    sensors_length=strlen(sensors);
     //registrar sensores
     //Esta funcion esta mas arriba para no repetir código luego -- Imanol
     wifi_connect();
@@ -202,9 +189,9 @@ int main(void)
     unsigned long delay2 = 0;
     sleep_thread(SHORT_PERIOD - time%SHORT_PERIOD);
 
-    uint32_t ind[TOTAL_SENSORS]={0};
-    char** buffers[TOTAL_SENSORS];
-    uint32_t sizes[TOTAL_SENSORS]={0};
+    uint32_t ind[sensors_length]={0};
+    char** buffers[sensors_length];
+    uint32_t sizes[sensors_length]={0};
     //char* cooked_data[TOTAL_SENSORS];
     int i  = 1;
 
@@ -261,8 +248,8 @@ int main(void)
             wifi_connect();
             // fem servir 085 de prova, però haurem de fer servir sensor_id[0]
             char id_0[3];
-            sprintf(id_0,"%x",sensors[first_sensor]);
-            while( send(buffers[first_sensor],&ind[first_sensor],&sizes[first_sensor], mod.ID, id_0) != JSON_POST_OK )
+            sprintf(id_0,"%x",sensors[0]);
+            while( send(buffers[0],&ind[0],&sizes[0], mod.ID, id_0) != JSON_POST_OK )
             {
                 // El servidor no ens sap dir si tenim permisos o no sense registrar una mostra.
                 // Intentem enviar un buffer sencer, a veure si ja podem buidar.
@@ -272,25 +259,25 @@ int main(void)
                 chThdSleepMilliseconds(HARD_LIMIT_WAIT_TIME);
             }
             int j;
-            for(j=first_sensor;j<TOTAL_SENSORS;j++)
+            for(j=1;j<sensors_length;j++)
             {   
-                if(sensors[j]!=0){   
-                    printf(" enviant buffer %d\r\n",j);
-                    // fem servir 085 de prova, però haurem de fer servir sensor_id[j]
-                    char id[3];
-                    sprintf(id,"%x",sensors[j]);
-                    int ok=send(buffers[j],&ind[j],&sizes[j], mod.ID, id);
-                    if(ok==JSON_COMM_ERROR)
-                    {
-                        printf("wismart is not connected\r\n");
-                    }
-                    else if( ok==JSON_OTHER_ERROR){
-                        printf("some error ocurred\r\n");
-                    }
-                    else if(ok ==JSON_POST_OK){
-                        printf(" send OK \r\n");
-                    } 
+                
+                printf(" enviant buffer %d\r\n",j);
+                // fem servir 085 de prova, però haurem de fer servir sensor_id[j]
+                char id[3];
+                sprintf(id,"%x",sensors[j]);
+                int ok=send(buffers[j],&ind[j],&sizes[j], mod.ID, id);
+                if(ok==JSON_COMM_ERROR)
+                {
+                    printf("wismart is not connected\r\n");
+                }
+                else if( ok==JSON_OTHER_ERROR){
+                    printf("some error ocurred\r\n");
                 }
+                else if(ok ==JSON_POST_OK){
+                    printf(" send OK \r\n");
+                } 
+                
             }
             wifi_disconnect();
         }