diff --git a/app/src/main/java/info/nightscout/androidaps/MainApp.java b/app/src/main/java/info/nightscout/androidaps/MainApp.java
index 64d260c99d..6b0ac728e3 100644
--- a/app/src/main/java/info/nightscout/androidaps/MainApp.java
+++ b/app/src/main/java/info/nightscout/androidaps/MainApp.java
@@ -51,6 +51,7 @@ import info.nightscout.androidaps.plugins.general.nsclient.receivers.DBAccessRec
 import info.nightscout.androidaps.plugins.general.overview.OverviewPlugin;
 import info.nightscout.androidaps.plugins.general.persistentNotification.PersistentNotificationPlugin;
 import info.nightscout.androidaps.plugins.general.smsCommunicator.SmsCommunicatorPlugin;
+import info.nightscout.androidaps.plugins.source.RandomBgPlugin;
 import info.nightscout.androidaps.utils.ActivityMonitor;
 import info.nightscout.androidaps.plugins.general.wear.WearPlugin;
 import info.nightscout.androidaps.plugins.general.xdripStatusline.StatuslinePlugin;
@@ -212,6 +213,7 @@ public class MainApp extends Application {
             pluginsList.add(SourcePoctechPlugin.getPlugin());
             pluginsList.add(SourceTomatoPlugin.getPlugin());
             pluginsList.add(SourceEversensePlugin.getPlugin());
+            if (engineeringMode) pluginsList.add(RandomBgPlugin.INSTANCE);
             if (!Config.NSCLIENT) pluginsList.add(SmsCommunicatorPlugin.INSTANCE);
             pluginsList.add(FoodPlugin.getPlugin());
 
diff --git a/app/src/main/java/info/nightscout/androidaps/interfaces/PluginDescription.java b/app/src/main/java/info/nightscout/androidaps/interfaces/PluginDescription.java
index 5882c5870c..2929d3f21b 100644
--- a/app/src/main/java/info/nightscout/androidaps/interfaces/PluginDescription.java
+++ b/app/src/main/java/info/nightscout/androidaps/interfaces/PluginDescription.java
@@ -29,8 +29,8 @@ public class PluginDescription {
         return this;
     }
 
-     public PluginDescription alwaysVisible(boolean alwayVisible) {
-        this.alwaysVisible = alwayVisible;
+     public PluginDescription alwaysVisible(boolean alwaysVisible) {
+        this.alwaysVisible = alwaysVisible;
         return this;
     }
 
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/source/RandomBgPlugin.kt b/app/src/main/java/info/nightscout/androidaps/plugins/source/RandomBgPlugin.kt
new file mode 100644
index 0000000000..d4463e39bd
--- /dev/null
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/source/RandomBgPlugin.kt
@@ -0,0 +1,76 @@
+package info.nightscout.androidaps.plugins.source
+
+import android.content.Intent
+import android.os.Handler
+import info.nightscout.androidaps.MainApp
+import info.nightscout.androidaps.R
+import info.nightscout.androidaps.db.BgReading
+import info.nightscout.androidaps.interfaces.BgSourceInterface
+import info.nightscout.androidaps.interfaces.PluginBase
+import info.nightscout.androidaps.interfaces.PluginDescription
+import info.nightscout.androidaps.interfaces.PluginType
+import info.nightscout.androidaps.logging.L
+import info.nightscout.androidaps.plugins.pump.virtual.VirtualPumpPlugin
+import info.nightscout.androidaps.utils.DateUtil
+import info.nightscout.androidaps.utils.T
+import org.slf4j.LoggerFactory
+import java.util.*
+import kotlin.math.PI
+import kotlin.math.sin
+
+object RandomBgPlugin : PluginBase(PluginDescription()
+        .mainType(PluginType.BGSOURCE)
+        .fragmentClass(BGSourceFragment::class.java.name)
+        .pluginName(R.string.randombg)
+        .shortName(R.string.randombg_short)
+        .description(R.string.description_source_randombg)), BgSourceInterface {
+
+    private val log = LoggerFactory.getLogger(L.BGSOURCE)
+
+    private val loopHandler = Handler()
+    private lateinit var refreshLoop: Runnable
+
+    const val interval = 5L // minutes
+
+    init {
+        refreshLoop = Runnable {
+            handleNewData(Intent())
+            loopHandler.postDelayed(refreshLoop, T.mins(interval).msecs())
+        }
+    }
+
+    override fun advancedFilteringSupported(): Boolean {
+        return false
+    }
+
+    override fun onStart() {
+        super.onStart()
+        loopHandler.postDelayed(refreshLoop, T.mins(interval).msecs())
+    }
+
+    override fun onStop() {
+        super.onStop()
+        loopHandler.removeCallbacks(refreshLoop)
+    }
+
+    override fun specialEnableCondition(): Boolean {
+        return VirtualPumpPlugin.getPlugin().isEnabled(PluginType.PUMP)
+    }
+
+    override fun handleNewData(intent: Intent) {
+        if (!isEnabled(PluginType.BGSOURCE)) return
+        val min = 70
+        val max = 190
+
+        val cal = GregorianCalendar()
+        val currentMinute = cal.get(Calendar.MINUTE) + (cal.get(Calendar.HOUR_OF_DAY) % 2) * 60
+        val bgMgdl = min + (max - min) * sin(currentMinute / 120.0 * 2 * PI)
+
+        val bgReading = BgReading()
+        bgReading.value = bgMgdl
+        bgReading.date = DateUtil.now()
+        bgReading.raw = bgMgdl
+        MainApp.getDbHelper().createIfNotExists(bgReading, "RandomBG")
+        log.debug("Generated BG: $bgReading")
+    }
+}
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 0ae7ebf708..60d2ecbdad 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1679,5 +1679,8 @@
     <string name="activitymonitor">Activity monitor</string>
     <string name="doyouwantresetstats">Do you want to reset activity stats?</string>
     <string name="statistics">Statistics</string>
+    <string name="randombg">Random BG</string>
+    <string name="description_source_randombg">Generate random BG data (Demo mode only)</string>
+    <string name="randombg_short">BG</string>
 
 </resources>