diff --git a/decoder.js b/decoder.js
index 57f8f377..6a835ea5 100644
--- a/decoder.js
+++ b/decoder.js
@@ -33,9 +33,13 @@ const PAYLOAD_TYPES = {
   0x03: 'ACK',
   0x04: 'ADVERT',
   0x05: 'GRP_TXT',
+  0x06: 'GRP_DATA',
   0x07: 'ANON_REQ',
   0x08: 'PATH',
   0x09: 'TRACE',
+  0x0A: 'MULTIPART',
+  0x0B: 'CONTROL',
+  0x0F: 'RAW_CUSTOM',
 };
 
 // Route types that carry transport codes (nextHop + lastHop, 2 bytes each)
diff --git a/public/app.js b/public/app.js
index 1ce959bc..b37d1b24 100644
--- a/public/app.js
+++ b/public/app.js
@@ -3,7 +3,7 @@
 
 // --- Route/Payload name maps ---
 const ROUTE_TYPES = { 0: 'TRANSPORT_FLOOD', 1: 'FLOOD', 2: 'DIRECT', 3: 'TRANSPORT_DIRECT' };
-const PAYLOAD_TYPES = { 0: 'Request', 1: 'Response', 2: 'Direct Msg', 3: 'ACK', 4: 'Advert', 5: 'Channel Msg', 7: 'Anon Req', 8: 'Path', 9: 'Trace', 11: 'Control' };
+const PAYLOAD_TYPES = { 0: 'Request', 1: 'Response', 2: 'Direct Msg', 3: 'ACK', 4: 'Advert', 5: 'Channel Msg', 6: 'Group Data', 7: 'Anon Req', 8: 'Path', 9: 'Trace', 10: 'Multipart', 11: 'Control', 15: 'Raw Custom' };
 const PAYLOAD_COLORS = { 0: 'req', 1: 'response', 2: 'txt-msg', 3: 'ack', 4: 'advert', 5: 'grp-txt', 7: 'anon-req', 8: 'path', 9: 'trace' };
 
 function routeTypeName(n) { return ROUTE_TYPES[n] || 'UNKNOWN'; }
diff --git a/public/index.html b/public/index.html
index 8dc5199b..2b468283 100644
--- a/public/index.html
+++ b/public/index.html
@@ -22,9 +22,9 @@
   <meta name="twitter:title" content="MeshCore Analyzer">
   <meta name="twitter:description" content="Real-time MeshCore LoRa mesh network analyzer — live packet visualization, node tracking, channel decryption, and route analysis.">
   <meta name="twitter:image" content="https://raw.githubusercontent.com/Kpa-clawbot/meshcore-analyzer/master/public/og-image.png">
-  <link rel="stylesheet" href="style.css?v=1774308178">
-  <link rel="stylesheet" href="home.css?v=1774308178">
-  <link rel="stylesheet" href="live.css?v=1774308178">
+  <link rel="stylesheet" href="style.css?v=1774315381">
+  <link rel="stylesheet" href="home.css?v=1774315381">
+  <link rel="stylesheet" href="live.css?v=1774315381">
   <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
     integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY="
     crossorigin="anonymous">
@@ -81,27 +81,27 @@
   <main id="app" role="main"></main>
 
   <script src="vendor/qrcode.js"></script>
-  <script src="roles.js?v=1774308178"></script>
-  <script src="customize.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="region-filter.js?v=1774308178"></script>
-  <script src="hop-resolver.js?v=1774308178"></script>
-  <script src="hop-display.js?v=1774308178"></script>
-  <script src="app.js?v=1774308178"></script>
-  <script src="home.js?v=1774308178"></script>
-  <script src="packet-filter.js?v=1774308178"></script>
-  <script src="packets.js?v=1774308178"></script>
-  <script src="map.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="channels.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="nodes.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="traces.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="analytics.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio-v1-constellation.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="audio-lab.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="live.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="observers.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="observer-detail.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="node-analytics.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
-  <script src="perf.js?v=1774308178" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="roles.js?v=1774315381"></script>
+  <script src="customize.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="region-filter.js?v=1774315381"></script>
+  <script src="hop-resolver.js?v=1774315381"></script>
+  <script src="hop-display.js?v=1774315381"></script>
+  <script src="app.js?v=1774315381"></script>
+  <script src="home.js?v=1774315381"></script>
+  <script src="packet-filter.js?v=1774315381"></script>
+  <script src="packets.js?v=1774315381"></script>
+  <script src="map.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="channels.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="nodes.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="traces.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="analytics.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio-v1-constellation.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="audio-lab.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="live.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="observers.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="observer-detail.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="node-analytics.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
+  <script src="perf.js?v=1774315381" onerror="console.error('Failed to load:', this.src)"></script>
 </body>
 </html>
diff --git a/public/packet-filter.js b/public/packet-filter.js
index 980c672d..e44512ca 100644
--- a/public/packet-filter.js
+++ b/public/packet-filter.js
@@ -6,9 +6,9 @@
 
   // Local copies of type maps (also available as window globals from app.js)
   // Standard firmware payload type names (canonical)
-  var FW_PAYLOAD_TYPES = { 0: 'REQ', 1: 'RESPONSE', 2: 'TXT_MSG', 3: 'ACK', 4: 'ADVERT', 5: 'GRP_TXT', 7: 'ANON_REQ', 8: 'PATH', 9: 'TRACE', 11: 'CONTROL' };
+  var FW_PAYLOAD_TYPES = { 0: 'REQ', 1: 'RESPONSE', 2: 'TXT_MSG', 3: 'ACK', 4: 'ADVERT', 5: 'GRP_TXT', 6: 'GRP_DATA', 7: 'ANON_REQ', 8: 'PATH', 9: 'TRACE', 10: 'MULTIPART', 11: 'CONTROL', 15: 'RAW_CUSTOM' };
   // Aliases: display names → firmware names (for user convenience)
-  var TYPE_ALIASES = { 'request': 'REQ', 'response': 'RESPONSE', 'direct msg': 'TXT_MSG', 'dm': 'TXT_MSG', 'ack': 'ACK', 'advert': 'ADVERT', 'channel msg': 'GRP_TXT', 'channel': 'GRP_TXT', 'anon req': 'ANON_REQ', 'path': 'PATH', 'trace': 'TRACE', 'control': 'CONTROL' };
+  var TYPE_ALIASES = { 'request': 'REQ', 'response': 'RESPONSE', 'direct msg': 'TXT_MSG', 'dm': 'TXT_MSG', 'ack': 'ACK', 'advert': 'ADVERT', 'channel msg': 'GRP_TXT', 'channel': 'GRP_TXT', 'group data': 'GRP_DATA', 'anon req': 'ANON_REQ', 'path': 'PATH', 'trace': 'TRACE', 'multipart': 'MULTIPART', 'control': 'CONTROL', 'raw': 'RAW_CUSTOM', 'custom': 'RAW_CUSTOM' };
   var ROUTE_TYPES = { 0: 'TRANSPORT_FLOOD', 1: 'FLOOD', 2: 'DIRECT', 3: 'TRANSPORT_DIRECT' };
 
   // Use window globals if available (they may have more types)
diff --git a/test-decoder.js b/test-decoder.js
index 3ef8b419..2d5a6f0c 100644
--- a/test-decoder.js
+++ b/test-decoder.js
@@ -12,7 +12,7 @@ function test(name, fn) {
 // === Constants ===
 console.log('\n=== Constants ===');
 test('ROUTE_TYPES has 4 entries', () => assert.strictEqual(Object.keys(ROUTE_TYPES).length, 4));
-test('PAYLOAD_TYPES has 9 entries', () => assert.strictEqual(Object.keys(PAYLOAD_TYPES).length, 9));
+test('PAYLOAD_TYPES has 13 entries', () => assert.strictEqual(Object.keys(PAYLOAD_TYPES).length, 13));
 test('VALID_ROLES has repeater, companion, room, sensor', () => {
   for (const r of ['repeater', 'companion', 'room', 'sensor']) assert(VALID_ROLES.has(r));
 });