diff --git a/OmniLinkBridge/Extensions.cs b/OmniLinkBridge/Extensions.cs
index 681834f..a6af11e 100644
--- a/OmniLinkBridge/Extensions.cs
+++ b/OmniLinkBridge/Extensions.cs
@@ -24,6 +24,17 @@ namespace OmniLinkBridge
             return (b & (1 << pos)) != 0;
         }
 
+        public static (string, int) ToCommandCode(this string payload)
+        {
+            string[] payloads = payload.Split(',');
+
+            int code = 0;
+            if (payloads.Length > 1)
+                int.TryParse(payloads[1], out code);
+
+            return (payloads[0], code);
+        }
+
         public static string ToSpaceTitleCase(this string phrase)
         {
             return Regex.Replace(phrase, "(\\B[A-Z])", " $1");
diff --git a/OmniLinkBridge/MQTT/MessageProcessor.cs b/OmniLinkBridge/MQTT/MessageProcessor.cs
index c025886..8be0930 100644
--- a/OmniLinkBridge/MQTT/MessageProcessor.cs
+++ b/OmniLinkBridge/MQTT/MessageProcessor.cs
@@ -38,7 +38,7 @@ namespace OmniLinkBridge.MQTT
 
             if (type == CommandTypes.area && id <= OmniLink.Controller.Areas.Count)
                 ProcessAreaReceived(OmniLink.Controller.Areas[id], topic, payload);
-            else if (type == CommandTypes.zone && id > 0 && id <= OmniLink.Controller.Zones.Count)
+            else if (type == CommandTypes.zone && id <= OmniLink.Controller.Zones.Count)
                 ProcessZoneReceived(OmniLink.Controller.Zones[id], topic, payload);
             else if (type == CommandTypes.unit && id > 0 && id <= OmniLink.Controller.Units.Count)
                 ProcessUnitReceived(OmniLink.Controller.Units[id], topic, payload);
@@ -64,13 +64,16 @@ namespace OmniLinkBridge.MQTT
 
         private void ProcessAreaReceived(clsArea area, Topic command, string payload)
         {
+            int code;
+            (payload, code) = payload.ToCommandCode();
+
             if (command == Topic.command && Enum.TryParse(payload, true, out AreaCommands cmd))
             {
                 if (area.Number == 0)
                     log.Debug("SetArea: 0 implies all areas will be changed");
 
                 log.Debug("SetArea: {id} to {value}", area.Number, cmd.ToString().Replace("arm_", "").Replace("_", " "));
-                OmniLink.SendCommand(AreaMapping[cmd], 0, (ushort)area.Number);
+                OmniLink.SendCommand(AreaMapping[cmd], (byte)code, (ushort)area.Number);
             }
             else if (command == Topic.alarm_command && area.Number > 0 && Enum.TryParse(payload, true, out AlarmCommands alarm))
             {
@@ -92,10 +95,17 @@ namespace OmniLinkBridge.MQTT
 
         private void ProcessZoneReceived(clsZone zone, Topic command, string payload)
         {
-            if (command == Topic.command && Enum.TryParse(payload, true, out ZoneCommands cmd))
+            int code;
+            (payload, code) = payload.ToCommandCode();
+
+            if (command == Topic.command && Enum.TryParse(payload, true, out ZoneCommands cmd) && 
+                !(zone.Number == 0 && cmd == ZoneCommands.bypass))
             {
+                if (zone.Number == 0)
+                    log.Debug("SetZone: 0 implies all zones will be restored");
+
                 log.Debug("SetZone: {id} to {value}", zone.Number, payload);
-                OmniLink.SendCommand(ZoneMapping[cmd], 0, (ushort)zone.Number);
+                OmniLink.SendCommand(ZoneMapping[cmd], (byte)code, (ushort)zone.Number);
             }
         }
 
diff --git a/OmniLinkBridge/OmniLinkBridge.csproj b/OmniLinkBridge/OmniLinkBridge.csproj
index 09a164d..6de1c37 100644
--- a/OmniLinkBridge/OmniLinkBridge.csproj
+++ b/OmniLinkBridge/OmniLinkBridge.csproj
@@ -173,10 +173,10 @@
       <Version>4.5.0</Version>
     </PackageReference>
     <PackageReference Include="MQTTnet.Extensions.ManagedClient">
-      <Version>3.0.13</Version>
+      <Version>3.0.16</Version>
     </PackageReference>
     <PackageReference Include="Newtonsoft.Json">
-      <Version>12.0.3</Version>
+      <Version>13.0.1</Version>
     </PackageReference>
     <PackageReference Include="Serilog">
       <Version>2.10.0</Version>
@@ -185,17 +185,20 @@
       <Version>1.1.0</Version>
     </PackageReference>
     <PackageReference Include="Serilog.Sinks.Async">
-      <Version>1.4.0</Version>
+      <Version>1.5.0</Version>
     </PackageReference>
     <PackageReference Include="Serilog.Sinks.Console">
-      <Version>3.1.1</Version>
+      <Version>4.0.0</Version>
     </PackageReference>
     <PackageReference Include="Serilog.Sinks.File">
-      <Version>4.1.0</Version>
+      <Version>5.0.0</Version>
     </PackageReference>
     <PackageReference Include="Serilog.Sinks.Http">
       <Version>7.2.0</Version>
     </PackageReference>
+    <PackageReference Include="System.ValueTuple">
+      <Version>4.5.0</Version>
+    </PackageReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/OmniLinkBridgeTest/ExtensionTest.cs b/OmniLinkBridgeTest/ExtensionTest.cs
index 1f032b1..8e5f78d 100644
--- a/OmniLinkBridgeTest/ExtensionTest.cs
+++ b/OmniLinkBridgeTest/ExtensionTest.cs
@@ -38,6 +38,23 @@ namespace OmniLinkBridgeTest
             Assert.AreEqual(true, ((byte)3).IsBitSet(1));
         }
 
+        [TestMethod]
+        public void TestToCommandCode()
+        {
+            string payload, command;
+            int code;
+
+            payload = "disarm";
+            (command, code) = payload.ToCommandCode();
+            Assert.AreEqual(command, "disarm");
+            Assert.AreEqual(code, 0);
+
+            payload = "disarm,1";
+            (command, code) = payload.ToCommandCode();
+            Assert.AreEqual(command, "disarm");
+            Assert.AreEqual(code, 1);
+        }
+
         [TestMethod]
         public void TestParseRange()
         {
diff --git a/OmniLinkBridgeTest/MQTTTest.cs b/OmniLinkBridgeTest/MQTTTest.cs
index 1f1238c..af30e07 100644
--- a/OmniLinkBridgeTest/MQTTTest.cs
+++ b/OmniLinkBridgeTest/MQTTTest.cs
@@ -39,7 +39,7 @@ namespace OmniLinkBridgeTest
         [TestMethod]
         public void AreaCommand()
         {
-            void check(ushort id, string payload, enuUnitCommand command)
+            void check(ushort id, int code, string payload, enuUnitCommand command)
             {
                 SendCommandEventArgs actual = null;
                 omniLink.OnSendCommand += (sender, e) => { actual = e; };
@@ -47,29 +47,35 @@ namespace OmniLinkBridgeTest
                 SendCommandEventArgs expected = new SendCommandEventArgs()
                 {
                     Cmd = command,
-                    Par = 0,
+                    Par = (byte)code,
                     Pr2 = id
                 };
                 Assert.AreEqual(expected, actual);
             }
 
-            // First area standard format
-            check(1, "disarm", enuUnitCommand.SecurityOff);
-            check(1, "arm_home", enuUnitCommand.SecurityDay);
-            check(1, "arm_away", enuUnitCommand.SecurityAway);
-            check(1, "arm_night", enuUnitCommand.SecurityNight);
-            check(1, "arm_home_instant", enuUnitCommand.SecurityDyi);
-            check(1, "arm_night_delay", enuUnitCommand.SecurityNtd);
-            check(1, "arm_vacation", enuUnitCommand.SecurityVac);
+            // Standard format
+            check(1, 0, "disarm", enuUnitCommand.SecurityOff);
+            check(1, 0, "arm_home", enuUnitCommand.SecurityDay);
+            check(1, 0, "arm_away", enuUnitCommand.SecurityAway);
+            check(1, 0, "arm_night", enuUnitCommand.SecurityNight);
+            check(1, 0, "arm_home_instant", enuUnitCommand.SecurityDyi);
+            check(1, 0, "arm_night_delay", enuUnitCommand.SecurityNtd);
+            check(1, 0, "arm_vacation", enuUnitCommand.SecurityVac);
 
-            // Last area with case check
-            check(8, "DISARM", enuUnitCommand.SecurityOff);
+            // Check all areas
+            check(0, 0, "disarm", enuUnitCommand.SecurityOff);
+
+            // Check with optional code
+            check(1, 1, "disarm,1", enuUnitCommand.SecurityOff);
+
+            // Check case insensitivity
+            check(8, 0, "DISARM", enuUnitCommand.SecurityOff);
         }
 
         [TestMethod]
         public void ZoneCommand()
         {
-            void check(ushort id, string payload, enuUnitCommand command)
+            void check(ushort id, int code, string payload, enuUnitCommand command, bool ensureNull = false)
             {
                 SendCommandEventArgs actual = null;
                 omniLink.OnSendCommand += (sender, e) => { actual = e; };
@@ -77,16 +83,31 @@ namespace OmniLinkBridgeTest
                 SendCommandEventArgs expected = new SendCommandEventArgs()
                 {
                     Cmd = command,
-                    Par = 0,
+                    Par = (byte)code,
                     Pr2 = id
                 };
-                Assert.AreEqual(expected, actual);
+
+                if (ensureNull)
+                    Assert.IsNull(actual);
+                else
+                    Assert.AreEqual(expected, actual);
             }
 
-            check(1, "bypass", enuUnitCommand.Bypass);
-            check(1, "restore", enuUnitCommand.Restore);
+            // Standard format
+            check(1, 0, "bypass", enuUnitCommand.Bypass);
+            check(1, 0, "restore", enuUnitCommand.Restore);
 
-            check(2, "BYPASS", enuUnitCommand.Bypass);
+            // Check all zones
+            check(0, 0, "restore", enuUnitCommand.Restore);
+
+            // Not allowed to bypass all zones
+            check(0, 0, "bypass", enuUnitCommand.Bypass, true);
+
+            // Check with optional code
+            check(1, 1, "bypass,1", enuUnitCommand.Bypass);
+
+            // Check case insensitivity
+            check(2, 0, "BYPASS", enuUnitCommand.Bypass);
         }
 
         [TestMethod]
diff --git a/README.md b/README.md
index a6f9e79..f40c4e3 100644
--- a/README.md
+++ b/README.md
@@ -177,6 +177,8 @@ string json
 
 PUB omnilink/areaX/command  
 string arm_home, arm_away, arm_night, disarm, arm_home_instant, arm_night_delay, arm_vacation
+note Use area 0 for all areas
+note Optionally the user code number can be specified 'disarm,1'
 
 PUB omnilink/areaX/alarm_command
 string burglary, fire, auxiliary
@@ -201,6 +203,8 @@ int Current relative humidity
 
 PUB omnilink/zoneX/command  
 string bypass, restore
+note Use zone 0 to restore all zones
+note Optionally the user code number can be specified 'bypass,1'
 ```
 
 ### Units