diff --git a/components/BLE/BLE.c b/components/BLE/BLE.c
index a729f96..44d5bef 100644
--- a/components/BLE/BLE.c
+++ b/components/BLE/BLE.c
@@ -13,6 +13,11 @@ static const char *TAG = "BLE";
 static bool Host_And_Controller_Synced = false;
 static bool Is_Scanning = false;
 static bool Is_Advertising = false;
+static bool Is_Quiet = false;
+static bool Was_Advertising = false;
+
+static TimerHandle_t BLEUnquietTimer = NULL;
+static StaticTimer_t xBLEUnquietTimerBuffer;
 
 static uint8_t Advertising_Data[BLE_KTAG_PACKET_TOTAL_SIZE] = {0x1E, 0xFF, 0xFF, 0xFF, 'K', 'T', 'a', 'g'};
 
@@ -271,8 +276,34 @@ SystemKResult_T BLE_ScanAndAdvertise(void)
         }
         if (Is_Advertising == false)
         {
-            ble_advertise();
-            Is_Advertising = true;
+            if (Is_Quiet == false)
+            {
+                ble_advertise();
+                Is_Advertising = true;
+            }
+            else
+            {
+                // If we are quiet, we don't want to advertise yet,
+                // but we will remember that we were asked to advertise.
+                Was_Advertising = true;
+            }
+        }
+        result = SYSTEMK_RESULT_SUCCESS;
+    }
+
+    return result;
+}
+
+SystemKResult_T BLE_StopScanning(void)
+{
+    SystemKResult_T result = SYSTEMK_RESULT_NOT_READY;
+
+    if (Host_And_Controller_Synced == true)
+    {
+        if (Is_Scanning == true)
+        {
+            ble_gap_disc_cancel();
+            Is_Scanning = false;
         }
         result = SYSTEMK_RESULT_SUCCESS;
     }
@@ -294,5 +325,132 @@ SystemKResult_T BLE_StopAdvertising(void)
         result = SYSTEMK_RESULT_SUCCESS;
     }
 
+    return result;
+}
+
+static void Unquiet_Timer_Callback(TimerHandle_t xTimer)
+{
+    KLOG_INFO(TAG, "Quiet time expired after %lu ms.", (xTimerGetPeriod(xTimer) * portTICK_PERIOD_MS));
+    BLE_Unquiet();
+}
+
+SystemKResult_T BLE_Quiet(uint32_t duration_ms)
+{
+    SystemKResult_T result = SYSTEMK_RESULT_NOT_READY;
+
+    if (Is_Quiet == true)
+    {
+        // Already quiet; reset timer with new duration if duration_ms > 0.
+        if (duration_ms > 0)
+        {
+            // Stop the timer and change the period if it is already running.
+            if (BLEUnquietTimer != NULL)
+            {
+                xTimerStop(BLEUnquietTimer, 0);
+                xTimerChangePeriod(BLEUnquietTimer, pdMS_TO_TICKS(duration_ms), 0);
+                xTimerStart(BLEUnquietTimer, 0);
+            }
+            else
+            {
+                // There should already be a timer, but just in case...
+                BLEUnquietTimer = xTimerCreateStatic(
+                    "BLEUnquietTimer",
+                    pdMS_TO_TICKS(duration_ms),
+                    pdFALSE,
+                    (void *)0,
+                    Unquiet_Timer_Callback,
+                    &xBLEUnquietTimerBuffer);
+
+                if (BLEUnquietTimer == NULL)
+                {
+                    KLOG_ERROR(TAG, "Couldn't create the BLEUnquietTimer!");
+                    result = SYSTEMK_RESULT_FAILED_TO_CREATE_RTOS_TIMER;
+                }
+                else
+                {
+                    if (xTimerStart(BLEUnquietTimer, 0) != pdPASS)
+                    {
+                        KLOG_ERROR(TAG, "Couldn't start the BLEUnquietTimer!");
+                        result = SYSTEMK_RESULT_FAILED_TO_START_RTOS_TIMER;
+                    }
+                }
+            }
+        }
+        else
+        {
+            // If duration_ms is 0, stop the timer to stay quiet indefinitely.
+            if (BLEUnquietTimer != NULL)
+            {
+                xTimerStop(BLEUnquietTimer, 0);
+            }
+        }
+        result = SYSTEMK_RESULT_SUCCESS;
+    }
+    else if (Host_And_Controller_Synced == true)
+    {
+        Is_Quiet = true;
+
+        if (Is_Advertising == true)
+        {
+            ble_gap_adv_stop();
+            Is_Advertising = false;
+            Was_Advertising = true;
+        }
+
+        if (duration_ms > 0)
+        {
+            // Set a timer to unquiet after the specified duration.
+            BLEUnquietTimer = xTimerCreateStatic(
+                "BLEUnquietTimer",
+                pdMS_TO_TICKS(duration_ms),
+                pdFALSE,
+                (void *)0,
+                Unquiet_Timer_Callback,
+                &xBLEUnquietTimerBuffer);
+
+            if (BLEUnquietTimer == NULL)
+            {
+                KLOG_ERROR(TAG, "Couldn't create the BLEUnquietTimer!");
+                result = SYSTEMK_RESULT_FAILED_TO_CREATE_RTOS_TIMER;
+            }
+            else
+            {
+                if (xTimerStart(BLEUnquietTimer, 0) != pdPASS)
+                {
+                    KLOG_ERROR(TAG, "Couldn't start the BLEUnquietTimer!");
+					result = SYSTEMK_RESULT_FAILED_TO_START_RTOS_TIMER;
+                }
+            }
+        }
+        result = SYSTEMK_RESULT_SUCCESS;
+    }
+
+    return result;
+}
+
+SystemKResult_T BLE_Unquiet(void)
+{
+    SystemKResult_T result = SYSTEMK_RESULT_NOT_READY;
+
+    KLOG_INFO(TAG, "BLE_Unquiet()");
+
+    if (Is_Quiet == false)
+    {
+        // Already unquiet; no action needed.
+        return SYSTEMK_RESULT_SUCCESS;
+    }
+
+    if (Host_And_Controller_Synced == true)
+    {
+        Is_Quiet = false;
+        if (Was_Advertising == true)
+        {
+            ble_advertise();
+            Is_Advertising = true;
+            Was_Advertising = false;
+        }
+        result = SYSTEMK_RESULT_SUCCESS;
+    }
+
     return result;
 }
\ No newline at end of file
diff --git a/components/SystemK b/components/SystemK
index 7aa8275..430aec5 160000
--- a/components/SystemK
+++ b/components/SystemK
@@ -1 +1 @@
-Subproject commit 7aa827563a00b9bfa74e89be60f8529259ddac99
+Subproject commit 430aec54b8d6edde82c3bc9240e34b6a9e31aa09
diff --git a/main/Version.h b/main/Version.h
index 9e8eb16..af1bea1 100644
--- a/main/Version.h
+++ b/main/Version.h
@@ -24,7 +24,7 @@
 #define VERSION_H
 
 #define VERSION_MAJOR 00
-#define VERSION_MINOR 41
+#define VERSION_MINOR 42
 
 #define STRINGIFY(number) #number
 #define VERSION_STRING(major, minor) STRINGIFY(major) "." STRINGIFY(minor)
diff --git a/spiffs_image/boot_message.txt b/spiffs_image/boot_message.txt
index ed41c0c..b389ce5 100644
--- a/spiffs_image/boot_message.txt
+++ b/spiffs_image/boot_message.txt
@@ -1 +1 @@
-Welcome to KTag!  SPIFFS version 00.41
\ No newline at end of file
+Welcome to KTag!  SPIFFS version 00.42
\ No newline at end of file