diff --git a/src/lv_core/lv_obj.c b/src/lv_core/lv_obj.c
index f24d07e181..27a61447f6 100644
--- a/src/lv_core/lv_obj.c
+++ b/src/lv_core/lv_obj.c
@@ -2882,7 +2882,6 @@ void lv_obj_set_user_data(lv_obj_t * obj, lv_obj_user_data_t data)
 }
 #endif
 
-#if LV_USE_GROUP
 /**
  * Get the group of the object
  * @param obj pointer to an object
@@ -2892,7 +2891,11 @@ void * lv_obj_get_group(const lv_obj_t * obj)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
+#if LV_USE_GROUP
     return obj->group_p;
+#else
+    return NULL;
+#endif
 }
 
 /**
@@ -2904,13 +2907,15 @@ bool lv_obj_is_focused(const lv_obj_t * obj)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
+#if LV_USE_GROUP
     if(obj->group_p) {
         if(lv_group_get_focused(obj->group_p) == obj) return true;
     }
-
     return false;
-}
+#else
+    return false;
 #endif
+}
 
 
 /*-------------------
diff --git a/src/lv_core/lv_obj.h b/src/lv_core/lv_obj.h
index 2e526bafe0..b41a8b079b 100644
--- a/src/lv_core/lv_obj.h
+++ b/src/lv_core/lv_obj.h
@@ -1383,7 +1383,6 @@ void lv_obj_set_user_data(lv_obj_t * obj, lv_obj_user_data_t data);
 
 #endif
 
-#if LV_USE_GROUP
 /**
  * Get the group of the object
  * @param obj pointer to an object
@@ -1398,8 +1397,6 @@ void * lv_obj_get_group(const lv_obj_t * obj);
  */
 bool lv_obj_is_focused(const lv_obj_t * obj);
 
-#endif
-
 /*-------------------
  * OTHER FUNCTIONS
  *------------------*/
diff --git a/src/lv_hal/lv_hal_disp.h b/src/lv_hal/lv_hal_disp.h
index 95868d4adc..da664f6ac1 100644
--- a/src/lv_hal/lv_hal_disp.h
+++ b/src/lv_hal/lv_hal_disp.h
@@ -243,6 +243,13 @@ lv_coord_t lv_disp_get_ver_res(lv_disp_t * disp);
  */
 bool lv_disp_get_antialiasing(lv_disp_t * disp);
 
+/**
+ * Get the DPI of the display
+ * @param disp pointer to a display (NULL to use the default display)
+ * @return dpi of the display
+ */
+uint32_t lv_disp_get_dpi(lv_disp_t * disp);
+
 /**
  * Get the size category of the display based on it's hor. res. and dpi.
  * @param disp pointer to a display (NULL to use the default display)
diff --git a/src/lv_misc/lv_mem.c b/src/lv_misc/lv_mem.c
index 926cc1e23c..7f2037371a 100644
--- a/src/lv_misc/lv_mem.c
+++ b/src/lv_misc/lv_mem.c
@@ -160,7 +160,6 @@ void * lv_mem_alloc(size_t size)
 #endif
     void * alloc = NULL;
 
-    printf("alloc: %d\n", size);
 #if LV_MEM_CUSTOM == 0
     /*Use the built-in allocators*/
     lv_mem_ent_t * e = NULL;
@@ -786,7 +785,6 @@ static lv_mem_ent_t * ent_get_next(lv_mem_ent_t * act_e)
 static void * ent_alloc(lv_mem_ent_t * e, size_t size)
 {
     void * alloc = NULL;
-    printf("%s, size:%d\n", e->header.s.used == 0 ? "free" : "used", e->header.s.d_size);
     /*If the memory is free and big enough then use it */
     if(e->header.s.used == 0 && e->header.s.d_size >= size) {
         /*Truncate the entry to the desired size */
diff --git a/src/lv_widgets/lv_cont.c b/src/lv_widgets/lv_cont.c
index 9b91edd329..cd2ce3f5d1 100644
--- a/src/lv_widgets/lv_cont.c
+++ b/src/lv_widgets/lv_cont.c
@@ -243,7 +243,7 @@ lv_fit_t lv_cont_get_fit_bottom(const lv_obj_t * cont)
 /**********************
  *   STATIC FUNCTIONS
  **********************/
-extern uint32_t cont_sign;
+
 /**
  * Signal function of the container
  * @param cont pointer to a container object
@@ -528,7 +528,6 @@ static void lv_cont_layout_pretty(lv_obj_t * cont)
                     break;
                 }
                 w_row += w + pinner; /*Add the object width + inner padding*/
-                lv_coord_t child_h = lv_obj_get_height(child_rc);
 
                 lv_coord_t h = lv_obj_get_height(child_rc);
                 h += lv_obj_get_style_margin_top(child_rc, LV_OBJ_PART_MAIN);