diff --git a/hardware/PiSrf/package.json b/hardware/PiSrf/package.json
index 57acdf95..8285c878 100644
--- a/hardware/PiSrf/package.json
+++ b/hardware/PiSrf/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-pisrf",
-    "version"       : "0.0.4",
+    "version"       : "0.0.5",
     "description"   : "A Node-RED node for a Raspberry Pi to use a SRF04 or SRF05 range finder",
     "dependencies"  : {
     },
diff --git a/hardware/PiSrf/pisrf.html b/hardware/PiSrf/pisrf.html
index df614961..af0b26cd 100644
--- a/hardware/PiSrf/pisrf.html
+++ b/hardware/PiSrf/pisrf.html
@@ -4,6 +4,10 @@
         <label for="node-input-pins"><i class="fa fa-circle"></i> Pins</label>
         <input type="text" id="node-input-pins" placeholder="Trigger,Echo">
     </div>
+    <div class="form-row">
+        <label for="node-input-topic"><i class="fa fa-bars"></i> Topic</label>
+        <input type="text" id="node-input-topic" placeholder="optional topic">
+    </div>
     <br/>
     <div class="form-row">
         <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
@@ -26,6 +30,7 @@
         color:"#c6dbef",
         defaults: {
             name: { value:"" },
+            topic: { value:"SRF" },
             pins: { value:"", required:true, validate:RED.validators.regex(/^\d+,\d+$/) }
         },
         inputs:0,
diff --git a/hardware/PiSrf/pisrf.js b/hardware/PiSrf/pisrf.js
index 3f92fc68..61a827be 100644
--- a/hardware/PiSrf/pisrf.js
+++ b/hardware/PiSrf/pisrf.js
@@ -24,6 +24,7 @@ module.exports = function(RED) {
 
     function PiSrfNode(n) {
         RED.nodes.createNode(this, n);
+        this.topic = n.topic;
         this.pins = n.pins;
         var node = this;
 
@@ -36,7 +37,7 @@ module.exports = function(RED) {
                 if (RED.settings.verbose) { node.log("out: " + data + " :"); }
                 data = data.toString().trim();
                 if (data.length > 0) {
-                    node.send({topic:"SRF",payload:data});
+                    node.send({topic:node.topic, payload:data});
                 }
             });