diff --git a/package.json b/package.json
index 431ebf3..8088f26 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,9 @@
     },
     {
       "name": "Fabio Huser (node-bacstack)"
+    },
+    {
+      "name": "Colin Kuebler (kueblc)"
     }
   ],
   "license": "MIT",
diff --git a/src/bacnet-client.html b/src/bacnet-client.html
index 963f69b..9ef1dc6 100644
--- a/src/bacnet-client.html
+++ b/src/bacnet-client.html
@@ -29,11 +29,11 @@
     </div>
     <div class="form-row">
         <label for="node-config-input-interface"><i class="icon-tag"></i> <span data-i18n="bacnet-contrib.label.interface"></span></label>
-        <input type="text" id="node-config-input-interface" placeholder="127.0.0.1">
+        <input type="text" id="node-config-input-interface" placeholder="0.0.0.0">
     </div>
     <div class="form-row">
         <label for="node-config-input-broadcastAddress"><i class="icon-tag"></i> <span data-i18n="bacnet-contrib.label.broadcastAddress"></span></label>
-        <input type="text" id="node-config-input-broadcastAddress" placeholder="127.0.0.255">
+        <input type="text" id="node-config-input-broadcastAddress" placeholder="0.0.0.255">
     </div>
     <div class="form-row">
         <label for="node-config-input-port"><i class="icon-tag"></i> <span data-i18n="bacnet-contrib.label.port"></span></label>
diff --git a/src/bacnet-client.js b/src/bacnet-client.js
index ee9d756..4fbb688 100644
--- a/src/bacnet-client.js
+++ b/src/bacnet-client.js
@@ -16,21 +16,15 @@ module.exports = function (RED) {
     this.name = config.name
     this.adpuTimeout = parseInt(config.adpuTimeout) || 6000
     this.port = parseInt(config.port) || 47808
-    this.IPAddress = config.IPAddress || '0.0.0.0'
+    this.interface = config.interface || '0.0.0.0'
     this.broadcastAddress = config.broadcastAddress || '0.0.0.255'
 
     const node = this
     node.devices = []
 
-    if (node.IPAddress) {
-      bacnetCore.internalDebugLog('client with IP settings')
-      node.client = new BACnet({ adpuTimeout: node.adpuTimeout, port: node.port, interface: node.IPAddress, broadcastAddress: node.broadcastAddress })
-    } else {
-      bacnetCore.internalDebugLog('client without IP settings')
-      node.client = new BACnet({ adpuTimeout: node.adpuTimeout, port: node.port })
-    }
+    function setupClient () {
+      node.client = new BACnet({ adpuTimeout: node.adpuTimeout, port: node.port, interface: node.interface, broadcastAddress: node.broadcastAddress })
 
-    if (node.client) {
       node.client.on('iAm', (device) => {
         node.devices.push(device)
         bacnetCore.internalDebugLog('iAm Event')
@@ -52,10 +46,12 @@ module.exports = function (RED) {
         node.client.close()
         node.client = null
         node.devices = []
-        node.client = new BACnet({ adpuTimeout: node.adpuTimeout, port: node.port, interface: node.IPAddress, broadcastAddress: node.broadcastAddress })
+        setupClient()
       })
     }
 
+    setupClient()
+
     node.on('input', function (msg) {
       msg.devices = node.devices
       node.send(msg)
diff --git a/src/bacnet-read.html b/src/bacnet-read.html
index 13614e1..b343e56 100644
--- a/src/bacnet-read.html
+++ b/src/bacnet-read.html
@@ -13,9 +13,9 @@
     defaults: {
       name: {value: ''},
       objectType: {value: ''},
-      instance: {type: "BACnet-Instance", required:true},
+      instance: {type: "BACnet-Instance"},
       propertyId: {value: ''},
-      device: {type: "BACnet-Device", required:true},
+      device: {type: "BACnet-Device"},
       server: {type: "BACnet-Client", required:true},
       multipleRead: {value: false}
     },
diff --git a/src/bacnet-read.js b/src/bacnet-read.js
index aa0511a..5087078 100644
--- a/src/bacnet-read.js
+++ b/src/bacnet-read.js
@@ -18,11 +18,19 @@ module.exports = function (RED) {
     this.propertyId = parseInt(config.propertyId)
     this.multipleRead = config.multipleRead
 
-    this.instance = RED.nodes.getNode(config.instance)
-    this.objectInstance = parseInt(this.instance.instanceAddress) || 0
-
-    this.device = RED.nodes.getNode(config.device)
-    this.deviceIPAddress = this.device.deviceAddress || '127.0.0.1'
+    if (config.instance) {
+      this.instance = RED.nodes.getNode(config.instance)
+      this.objectInstance = this.instance.instanceAddress
+    } else {
+      this.objectInstance = 0
+    }
+
+    if (config.device) {
+      this.device = RED.nodes.getNode(config.device)
+      this.deviceIPAddress = this.device.deviceAddress
+    } else {
+      this.deviceIPAddress = '127.0.0.1'
+    }
 
     this.connector = RED.nodes.getNode(config.server)
 
diff --git a/src/bacnet-write.html b/src/bacnet-write.html
index 125b173..3dadc3a 100644
--- a/src/bacnet-write.html
+++ b/src/bacnet-write.html
@@ -13,12 +13,12 @@
     defaults: {
       name: {value: ''},
       objectType: {value: '', required:true, validate: RED.validators.number()},
-      instance: {type: "BACnet-Instance", required:true},
-      valueTag: {value: '', required:true, validate: RED.validators.number()},
+      instance: {type: "BACnet-Instance"},
+      valueTag: {value: '', validate: RED.validators.number()},
       valueValue: {value: ''},
-      propertyId: {value: '', required:true, validate: RED.validators.number()},
+      propertyId: {value: '', validate: RED.validators.number()},
       priority: {value: ''},
-      device: {type: "BACnet-Device", required:true},
+      device: {type: "BACnet-Device"},
       server: {type: "BACnet-Client", required:true},
       multipleWrite: {value: false}
     },
diff --git a/src/bacnet-write.js b/src/bacnet-write.js
index b682fcc..648b9b7 100644
--- a/src/bacnet-write.js
+++ b/src/bacnet-write.js
@@ -24,11 +24,19 @@ module.exports = function (RED) {
 
     this.multipleWrite = config.multipleWrite
 
-    this.instance = RED.nodes.getNode(config.instance)
-    this.objectInstance = parseInt(this.instance.instanceAddress) || 0
+    if (config.instance) {
+      this.instance = RED.nodes.getNode(config.instance)
+      this.objectInstance = this.instance.instanceAddress
+    } else {
+      this.objectInstance = 0
+    }
 
-    this.device = RED.nodes.getNode(config.device)
-    this.deviceIPAddress = this.device.deviceAddress || '127.0.0.1' // IPv6 it is :: - but configure Node-RED too
+    if (config.device) {
+      this.device = RED.nodes.getNode(config.device)
+      this.deviceIPAddress = this.device.deviceAddress
+    } else {
+      this.deviceIPAddress = '127.0.0.1'
+    }
 
     this.connector = RED.nodes.getNode(config.server)