diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd79101..931b2d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 	OpenSeizureDetector Android App - Change Log
 	============================================
+    V4.2.11 - Added setting to change the delay before SMS alert is sent (Issue #202)
     V4.2.10 - fixed (infrequent) crash when opening data sharing page (#195), and crash if log manager fails to start (#196)
     V4.2.9 - fixed crash when using Polish translation.
     V4.2.8 - 
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index f611cbf..92c72e8 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    android:versionCode="144"
-    android:versionName="4.2.10">
+    android:versionCode="145"
+    android:versionName="4.2.11">
     <!-- android:allowBackup="false" -->
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
 
diff --git a/app/src/main/java/uk/org/openseizuredetector/SdServer.java b/app/src/main/java/uk/org/openseizuredetector/SdServer.java
index cba11af..d86a58e 100644
--- a/app/src/main/java/uk/org/openseizuredetector/SdServer.java
+++ b/app/src/main/java/uk/org/openseizuredetector/SdServer.java
@@ -128,7 +128,8 @@ public class SdServer extends Service implements SdDataReceiver {
     private String[] mSMSNumbers;
     private String mSMSMsgStr = "default SMS Message";
     public Time mSMSTime = null;  // last time we sent an SMS Alarm (limited to one per minute)
-    public SmsTimer mSmsTimer = null;  // Timer to wait 10 seconds before sending an alert to give the user chance to cancel it.
+    public SmsTimer mSmsTimer = null;  // Timer to wait for specified time before sending an alert to give the user chance to cancel it.
+    public int mSmsTimerSecs = 10;    // Time delay in seconds before sending SMS alert.
     private AlertDialog.Builder mSMSAlertDialog;   // Dialog shown during countdown to sending SMS.
 
     // Data Logging Parameters
@@ -993,7 +994,7 @@ public class SdServer extends Service implements SdDataReceiver {
         runOnUiThread(new Runnable() {
             public void run() {
                 mSmsTimer =
-                        new SmsTimer(10 * 1000, 1000);
+                        new SmsTimer(mSmsTimerSecs * 1000, 1000);
                 mSmsTimer.start();
             }
         });
@@ -1265,6 +1266,11 @@ public class SdServer extends Service implements SdDataReceiver {
             mUtil.writeToSysLogFile("updatePrefs() - SMSNumberStr = " + SMSNumberStr);
             Log.v(TAG, "updatePrefs() - mSMSNumbers = " + mSMSNumbers);
             mUtil.writeToSysLogFile("updatePrefs() - mSMSNumbers = " + mSMSNumbers);
+
+            String smsDelayPeriodStr = SP.getString("SMSDelayPeriod","10");
+            mSmsTimerSecs = Integer.parseInt(smsDelayPeriodStr);
+            Log.v(TAG,"updatePrefs() - mSmsTimerSecs = "+mSmsTimerSecs);
+
             mLogAlarms = SP.getBoolean("LogAlarms", true);
             Log.v(TAG, "updatePrefs() - mLogAlarms = " + mLogAlarms);
             mUtil.writeToSysLogFile("updatePrefs() - mLogAlarms = " + mLogAlarms);
@@ -1314,7 +1320,7 @@ public class SdServer extends Service implements SdDataReceiver {
 
             mUseNewUi = SP.getBoolean("UseNewUi", false);
         } catch (Exception ex) {
-            Log.v(TAG, "updatePrefs() - Problem parsing preferences!");
+            Log.v(TAG, "updatePrefs() - Problem parsing preferences!" + ex.toString());
             mUtil.writeToSysLogFile("SdServer.updatePrefs() - Error " + ex.toString());
             mUtil.showToast(getString(R.string.problem_parsing_preferences));
         }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d9611f5..e67d5c6 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -578,4 +578,6 @@
     <string name="restart_server">Restart Server</string>
     <string name="error_failed_to_create_local_event">ERROR: failed to create local event</string>
     <string name="error_failed_to_start_log_manager">ERROR: Failed to start Log Manager</string>
+    <string name="sms_delay_sec">SMS Delay (sec)</string>
+    <string name="sms_delay_sec_desc">The number of seconds to delay between an alarm initiating and an SMS message being sent (default=10)</string>
 </resources>
diff --git a/app/src/main/res/xml/alarm_prefs.xml b/app/src/main/res/xml/alarm_prefs.xml
index bcae6de..b5fa83f 100644
--- a/app/src/main/res/xml/alarm_prefs.xml
+++ b/app/src/main/res/xml/alarm_prefs.xml
@@ -50,6 +50,12 @@
             android:key="SMSAlarm"
             android:summary="@string/enable_sms_alarm_summary"
             android:title="@string/enable_sms_alarm_title" />
+        <EditTextPreference
+            android:key="SMSDelayPeriod"
+            android:title="@string/sms_delay_sec"
+            android:summary="@string/sms_delay_sec_desc"
+            android:inputType="number"
+            android:defaultValue="10" />
         <EditTextPreference
             android:defaultValue=""
             android:key="SMSNumbers"
diff --git a/releases/app-release-4.2.11a.apk b/releases/app-release-4.2.11a.apk
new file mode 100644
index 0000000..8dab691
Binary files /dev/null and b/releases/app-release-4.2.11a.apk differ