diff --git a/lv_conf_template.h b/lv_conf_template.h
index 8405cc734c..8bfe9da40c 100644
--- a/lv_conf_template.h
+++ b/lv_conf_template.h
@@ -725,8 +725,9 @@
 
 /*1: Enable system monitor component*/
 #define LV_USE_SYSMON   0
-
 #if LV_USE_SYSMON
+    /*Get the idle percentage. E.g. uint32_t my_get_idle(void);*/
+    #define LV_SYSMON_GET_IDLE lv_timer_get_idle
 
     /*1: Show CPU usage and FPS count
      * Requires `LV_USE_SYSMON = 1`*/
diff --git a/src/lv_conf_internal.h b/src/lv_conf_internal.h
index 98dff9594e..2fff711cf6 100644
--- a/src/lv_conf_internal.h
+++ b/src/lv_conf_internal.h
@@ -2375,8 +2375,15 @@
         #define LV_USE_SYSMON   0
     #endif
 #endif
-
 #if LV_USE_SYSMON
+    /*Get the idle percentage. E.g. uint32_t my_get_idle(void);*/
+    #ifndef LV_SYSMON_GET_IDLE
+        #ifdef CONFIG_LV_SYSMON_GET_IDLE
+            #define LV_SYSMON_GET_IDLE CONFIG_LV_SYSMON_GET_IDLE
+        #else
+            #define LV_SYSMON_GET_IDLE lv_timer_get_idle
+        #endif
+    #endif
 
     /*1: Show CPU usage and FPS count
      * Requires `LV_USE_SYSMON = 1`*/
diff --git a/src/misc/lv_timer.c b/src/misc/lv_timer.c
index 7b7ec2f862..5537e59109 100644
--- a/src/misc/lv_timer.c
+++ b/src/misc/lv_timer.c
@@ -258,7 +258,7 @@ void _lv_timer_core_deinit(void)
     _lv_ll_clear(timer_ll_p);
 }
 
-uint8_t lv_timer_get_idle(void)
+uint32_t lv_timer_get_idle(void)
 {
     return state.idle_last;
 }
diff --git a/src/misc/lv_timer.h b/src/misc/lv_timer.h
index 3b10c4cd15..06576a853b 100644
--- a/src/misc/lv_timer.h
+++ b/src/misc/lv_timer.h
@@ -224,7 +224,7 @@ void lv_timer_enable(bool en);
  * Get idle percentage
  * @return the lv_timer idle in percentage
  */
-uint8_t lv_timer_get_idle(void);
+uint32_t lv_timer_get_idle(void);
 
 /**
  * Get the time remaining until the next timer will run
diff --git a/src/others/sysmon/lv_sysmon.c b/src/others/sysmon/lv_sysmon.c
index 1437153893..50bb83d66a 100644
--- a/src/others/sysmon/lv_sysmon.c
+++ b/src/others/sysmon/lv_sysmon.c
@@ -144,15 +144,18 @@ static void perf_monitor_disp_event_cb(lv_event_t * e)
             break;
     }
 }
+uint32_t lv_os_get_idle_percent(void);
 
 static void perf_update_timer_cb(lv_timer_t * t)
 {
+    uint32_t LV_SYSMON_GET_IDLE(void);
+
     lv_sysmon_perf_info_t * info = lv_timer_get_user_data(t);
     info->calculated.run_cnt++;
 
     info->calculated.fps = info->measured.refr_interval_sum ? (1000 * info->measured.refr_cnt /
                                                                info->measured.refr_interval_sum) : 0;
-    info->calculated.cpu = 100 - lv_timer_get_idle();
+    info->calculated.cpu = 100 - LV_SYSMON_GET_IDLE();
     info->calculated.refr_avg_time = info->measured.refr_cnt ? (info->measured.refr_elaps_sum / info->measured.refr_cnt) :
                                      0;
     info->calculated.flush_avg_time = info->measured.flush_cnt ? (info->measured.flush_elaps_sum / info->measured.flush_cnt)