diff --git a/app/AGENTS_MQTT.md b/app/AGENTS_MQTT.md
index b922635..c32e443 100644
--- a/app/AGENTS_MQTT.md
+++ b/app/AGENTS_MQTT.md
@@ -196,10 +196,9 @@ On connect and every 5 minutes thereafter, the community publisher sends a retai
   "timestamp":         "2024-01-15T10:30:00.000000",
   "origin":            "NodeName",
   "origin_id":         "PUBKEY_HEX_UPPER",
-  "client":            "RemoteTerm (github.com/...)",
   "model":             "T-Deck",
   "firmware_version":  "v2.2.2 (Build: 2025-01-15)",
-  "radio":             "915.0MHz BW250.0 SF10 CR8",
+  "radio":             "915.0,250.0,10,8",
   "client_version":    "RemoteTerm/2.4.0",
   "stats": {
     "battery_mv": 4200,
@@ -216,7 +215,7 @@ On connect and every 5 minutes thereafter, the community publisher sends a retai
 ```
 
 - `model` and `firmware_version` are fetched once per connection via `send_device_query()` (requires firmware version >= 3)
-- `radio` is formatted from `self_info` radio parameters (freq, BW, SF, CR)
+- `radio` is comma-separated raw values from `self_info` (freq, BW, SF, CR) matching the reference format
 - `client_version` is read from Python package metadata (`remoteterm-meshcore`)
 - `stats` is fetched from `get_stats_core()` + `get_stats_radio()` every 5 minutes; omitted if firmware doesn't support stats commands
 - All radio queries use `blocking=False` — if the radio is busy, cached values are used. No user-facing operations are ever blocked.
diff --git a/app/community_mqtt.py b/app/community_mqtt.py
index 485ec3c..fead3f9 100644
--- a/app/community_mqtt.py
+++ b/app/community_mqtt.py
@@ -265,21 +265,24 @@ def _build_status_topic(settings: AppSettings, pubkey_hex: str) -> str:
 
 
 def _build_radio_info() -> str:
-    """Format the radio parameters string from self_info, or 'unknown'."""
+    """Format the radio parameters string from self_info.
+
+    Matches the reference format: ``"freq,bw,sf,cr"`` (comma-separated raw
+    values).  Falls back to ``"0,0,0,0"`` when unavailable.
+    """
     from app.radio import radio_manager
 
     try:
         if radio_manager.meshcore and radio_manager.meshcore.self_info:
             info = radio_manager.meshcore.self_info
-            freq = info.get("radio_freq")
-            bw = info.get("radio_bw")
-            sf = info.get("radio_sf")
-            cr = info.get("radio_cr")
-            if freq is not None and bw is not None and sf is not None and cr is not None:
-                return f"{freq}MHz BW{bw} SF{sf} CR{cr}"
+            freq = info.get("radio_freq", 0)
+            bw = info.get("radio_bw", 0)
+            sf = info.get("radio_sf", 0)
+            cr = info.get("radio_cr", 0)
+            return f"{freq},{bw},{sf},{cr}"
     except Exception:
         pass
-    return "unknown"
+    return "0,0,0,0"
 
 
 def _get_client_version() -> str:
@@ -340,6 +343,7 @@ class CommunityMqttPublisher(BaseMqttPublisher):
 
     def _build_client_kwargs(self, settings: AppSettings) -> dict[str, Any]:
         from app.keystore import get_private_key, get_public_key
+        from app.radio import radio_manager
 
         private_key = get_private_key()
         public_key = get_public_key()
@@ -357,12 +361,17 @@ class CommunityMqttPublisher(BaseMqttPublisher):
 
         tls_context = ssl.create_default_context()
 
+        device_name = ""
+        if radio_manager.meshcore and radio_manager.meshcore.self_info:
+            device_name = radio_manager.meshcore.self_info.get("name", "")
+
         status_topic = _build_status_topic(settings, pubkey_hex)
         offline_payload = json.dumps(
             {
                 "status": "offline",
+                "timestamp": datetime.now().isoformat(),
+                "origin": device_name or "MeshCore Device",
                 "origin_id": pubkey_hex,
-                "client": _CLIENT_ID,
             }
         )
 
@@ -494,7 +503,6 @@ class CommunityMqttPublisher(BaseMqttPublisher):
             "timestamp": datetime.now().isoformat(),
             "origin": device_name or "MeshCore Device",
             "origin_id": pubkey_hex,
-            "client": _CLIENT_ID,
             "model": device_info.get("model", "unknown"),
             "firmware_version": device_info.get("firmware_version", "unknown"),
             "radio": _build_radio_info(),
diff --git a/frontend/src/components/settings/SettingsMqttSection.tsx b/frontend/src/components/settings/SettingsMqttSection.tsx
index 5f6fd99..5a5b8c5 100644
--- a/frontend/src/components/settings/SettingsMqttSection.tsx
+++ b/frontend/src/components/settings/SettingsMqttSection.tsx
@@ -341,7 +341,16 @@ export function SettingsMqttSection({
           <div className="px-4 pb-4 space-y-3 border-t border-input">
             <p className="text-xs text-muted-foreground pt-3">
               Share raw packet data with the MeshCore community for coverage mapping and network
-              analysis. Only raw RF packets are shared — never decrypted messages.
+              analysis. Only raw RF packets are shared — never decrypted messages. General parity
+              with{' '}
+              <a
+                href="https://github.com/agessaman/meshcore-packet-capture"
+                target="_blank"
+                rel="noopener noreferrer"
+              >
+                meshcore-packet-capture
+              </a>
+              .
             </p>
             <label className="flex items-center gap-3 cursor-pointer">
               <input
diff --git a/tests/test_community_mqtt.py b/tests/test_community_mqtt.py
index 49a9db1..8c39221 100644
--- a/tests/test_community_mqtt.py
+++ b/tests/test_community_mqtt.py
@@ -463,9 +463,14 @@ class TestLwtAndStatusPublish:
             community_mqtt_iata="SFO",
         )
 
+        mock_radio = MagicMock()
+        mock_radio.meshcore = MagicMock()
+        mock_radio.meshcore.self_info = {"name": "TestNode"}
+
         with (
             patch("app.keystore.get_private_key", return_value=private_key),
             patch("app.keystore.get_public_key", return_value=public_key),
+            patch("app.radio.radio_manager", mock_radio),
         ):
             kwargs = pub._build_client_kwargs(settings)
 
@@ -475,8 +480,10 @@ class TestLwtAndStatusPublish:
         assert will.retain is True
         payload = json.loads(will.payload)
         assert payload["status"] == "offline"
+        assert payload["origin"] == "TestNode"
         assert payload["origin_id"] == pubkey_hex
-        assert payload["client"] == _CLIENT_ID
+        assert "timestamp" in payload
+        assert "client" not in payload
 
     @pytest.mark.asyncio
     async def test_on_connected_async_publishes_online_status(self):
@@ -505,7 +512,7 @@ class TestLwtAndStatusPublish:
             patch.object(
                 pub, "_fetch_stats", new_callable=AsyncMock, return_value={"battery_mv": 4200}
             ),
-            patch("app.community_mqtt._build_radio_info", return_value="915.0MHz BW250.0 SF10 CR8"),
+            patch("app.community_mqtt._build_radio_info", return_value="915.0,250.0,10,8"),
             patch("app.community_mqtt._get_client_version", return_value="RemoteTerm/2.4.0"),
             patch.object(pub, "publish", new_callable=AsyncMock) as mock_publish,
         ):
@@ -521,11 +528,11 @@ class TestLwtAndStatusPublish:
         assert payload["status"] == "online"
         assert payload["origin"] == "TestNode"
         assert payload["origin_id"] == pubkey_hex
-        assert payload["client"] == _CLIENT_ID
+        assert "client" not in payload
         assert "timestamp" in payload
         assert payload["model"] == "T-Deck"
         assert payload["firmware_version"] == "v2.2.2 (Build: 2025-01-15)"
-        assert payload["radio"] == "915.0MHz BW250.0 SF10 CR8"
+        assert payload["radio"] == "915.0,250.0,10,8"
         assert payload["client_version"] == "RemoteTerm/2.4.0"
         assert payload["stats"] == {"battery_mv": 4200}
 
@@ -539,9 +546,13 @@ class TestLwtAndStatusPublish:
             community_mqtt_iata="JFK",
         )
 
+        mock_radio = MagicMock()
+        mock_radio.meshcore = None
+
         with (
             patch("app.keystore.get_private_key", return_value=private_key),
             patch("app.keystore.get_public_key", return_value=public_key),
+            patch("app.radio.radio_manager", mock_radio),
         ):
             kwargs = pub._build_client_kwargs(settings)
 
@@ -583,7 +594,7 @@ class TestLwtAndStatusPublish:
                 return_value={"model": "unknown", "firmware_version": "unknown"},
             ),
             patch.object(pub, "_fetch_stats", new_callable=AsyncMock, return_value=None),
-            patch("app.community_mqtt._build_radio_info", return_value="unknown"),
+            patch("app.community_mqtt._build_radio_info", return_value="0,0,0,0"),
             patch("app.community_mqtt._get_client_version", return_value="RemoteTerm/unknown"),
             patch.object(pub, "publish", new_callable=AsyncMock) as mock_publish,
         ):
@@ -822,7 +833,7 @@ class TestFetchStats:
 
 class TestBuildRadioInfo:
     def test_formatted_string(self):
-        """Should return formatted radio info string."""
+        """Should return comma-separated radio info matching reference format."""
         mock_radio = MagicMock()
         mock_radio.meshcore = MagicMock()
         mock_radio.meshcore.self_info = {
@@ -835,20 +846,20 @@ class TestBuildRadioInfo:
         with patch("app.radio.radio_manager", mock_radio):
             result = _build_radio_info()
 
-        assert result == "915.0MHz BW250.0 SF10 CR8"
+        assert result == "915.0,250.0,10,8"
 
     def test_fallback_when_no_meshcore(self):
-        """Should return 'unknown' when meshcore is None."""
+        """Should return '0,0,0,0' when meshcore is None."""
         mock_radio = MagicMock()
         mock_radio.meshcore = None
 
         with patch("app.radio.radio_manager", mock_radio):
             result = _build_radio_info()
 
-        assert result == "unknown"
+        assert result == "0,0,0,0"
 
     def test_fallback_when_self_info_missing_fields(self):
-        """Should return 'unknown' when self_info lacks radio fields."""
+        """Should use 0 defaults when self_info lacks radio fields."""
         mock_radio = MagicMock()
         mock_radio.meshcore = MagicMock()
         mock_radio.meshcore.self_info = {"name": "TestNode"}
@@ -856,7 +867,7 @@ class TestBuildRadioInfo:
         with patch("app.radio.radio_manager", mock_radio):
             result = _build_radio_info()
 
-        assert result == "unknown"
+        assert result == "0,0,0,0"
 
 
 class TestGetClientVersion:
@@ -905,7 +916,7 @@ class TestPublishStatus:
                 return_value={"model": "T-Deck", "firmware_version": "v2.2.2 (Build: 2025-01-15)"},
             ),
             patch.object(pub, "_fetch_stats", new_callable=AsyncMock, return_value=stats),
-            patch("app.community_mqtt._build_radio_info", return_value="915.0MHz BW250.0 SF10 CR8"),
+            patch("app.community_mqtt._build_radio_info", return_value="915.0,250.0,10,8"),
             patch("app.community_mqtt._get_client_version", return_value="RemoteTerm/2.4.0"),
             patch.object(pub, "publish", new_callable=AsyncMock) as mock_publish,
         ):
@@ -915,10 +926,10 @@ class TestPublishStatus:
         assert payload["status"] == "online"
         assert payload["origin"] == "TestNode"
         assert payload["origin_id"] == pubkey_hex
-        assert payload["client"] == _CLIENT_ID
+        assert "client" not in payload
         assert payload["model"] == "T-Deck"
         assert payload["firmware_version"] == "v2.2.2 (Build: 2025-01-15)"
-        assert payload["radio"] == "915.0MHz BW250.0 SF10 CR8"
+        assert payload["radio"] == "915.0,250.0,10,8"
         assert payload["client_version"] == "RemoteTerm/2.4.0"
         assert payload["stats"] == stats
 
@@ -942,7 +953,7 @@ class TestPublishStatus:
                 return_value={"model": "unknown", "firmware_version": "unknown"},
             ),
             patch.object(pub, "_fetch_stats", new_callable=AsyncMock, return_value=None),
-            patch("app.community_mqtt._build_radio_info", return_value="unknown"),
+            patch("app.community_mqtt._build_radio_info", return_value="0,0,0,0"),
             patch("app.community_mqtt._get_client_version", return_value="RemoteTerm/unknown"),
             patch.object(pub, "publish", new_callable=AsyncMock) as mock_publish,
         ):
@@ -973,7 +984,7 @@ class TestPublishStatus:
                 return_value={"model": "unknown", "firmware_version": "unknown"},
             ),
             patch.object(pub, "_fetch_stats", new_callable=AsyncMock, return_value=None),
-            patch("app.community_mqtt._build_radio_info", return_value="unknown"),
+            patch("app.community_mqtt._build_radio_info", return_value="0,0,0,0"),
             patch("app.community_mqtt._get_client_version", return_value="RemoteTerm/unknown"),
             patch.object(pub, "publish", new_callable=AsyncMock),
         ):