diff --git a/app.py b/app.py
index 9f1a6bb..7a74f2b 100644
--- a/app.py
+++ b/app.py
@@ -60,11 +60,13 @@ def transmit():
         action = ACTION_MAP[data['action']]
         intensity = int(data.get('intensity', 0))
         lucal = bool(data.get('lucalEncoded', False))
+        pin = int(data['shockerPin'])
     # If any of those failed, return an error.
     except (ValueError, KeyError):
         return {'success': False, 'message': 'Request must contain the following keys:\n'+
                                              'txID: int,\n'+
                                              'channel: int,\n'+
+                                             'pin: int,\n'+
                                              'action: "shock", "vibrate" or "beep",\n'+
                                              'intensity (optional): int\n'+
                                              'lucalEncoded (optional): bool'}, 400
diff --git a/www/index.html b/www/index.html
index ba4c1fd..a354a43 100644
--- a/www/index.html
+++ b/www/index.html
@@ -18,6 +18,8 @@
             <input type="number" value="1" min="1" max="3" id="channelIDInput">
             <h2>LucalEncoded?</h2>
             <input type="checkbox" id="lucalEncodedInput">
+            <h2>PIN</h2>
+            <input type="number" id="shockerPinInput">
             <h2>Shock</h2>
             <input type="range" min="0" max="99" value="0" id="shockIntensity" oninput="document.getElementById('sliderValueFirst').value = this.value" class="sliderInput">
             <br>
diff --git a/www/main.js b/www/main.js
index 9efd66b..7e42090 100644
--- a/www/main.js
+++ b/www/main.js
@@ -24,13 +24,13 @@ function assert(condition, message) {
     }
 }
 
-async function transmit(transmitterID, channel, action, intensity=0, lucalEncoded=false) {
+async function transmit(transmitterID, channel, action, intensity=0, lucalEncoded=false, shockerPin) {
     assert(typeof transmitterID === 'number');
     assert(typeof channel === 'number');
     assert(['shock', 'vibrate', 'beep'].includes(action));
     assert(typeof intensity === 'number');
     assert(typeof lucalEncoded === 'boolean');
-    POST('/transmit', {transmitterID: transmitterID, channel: channel, action: action, intensity: intensity, lucalEncoded: lucalEncoded});
+    POST('/transmit', {transmitterID: transmitterID, channel: channel, action: action, intensity: intensity, lucalEncoded: lucalEncoded, shockerPin: shockerPin});
 }
 
 
@@ -39,7 +39,8 @@ async function txFromUI(action, intensity=0) {
     let transmitterID = Number(document.getElementById('transmitterIDInput').value);
     let channel = Number(document.getElementById('channelIDInput').value);
     let lucalEncoded = document.getElementById('lucalEncodedInput').checked;
-    transmit(transmitterID, channel, action, intensity, lucalEncoded);
+    let shockerPin = document.getElementById('shockerPinInput').value;
+    transmit(transmitterID, channel, action, intensity, lucalEncoded, shockerPin);
 }
 
 async function shock() {