Packet #996708 Success

NODEINFO_APP packet from Athens-Clarke Piedmont Hospital (UM) (ACPH) to !ffffffff

1
Total Receptions
1
Unique Gateways
2
Hop Count
103
Payload Bytes
Packet Information
Database ID: 996708
Mesh Packet ID: 0x68dae7d8
Used for correlation across gateways
Timestamp: 2026-04-01 03:55:55 UTC
From Node: Athens-Clarke Piedmont Hospital (UM) (ACPH)
To Node: !ffffffff (ffff)
Success: Processed
Protocol: NODEINFO_APP
Port: 4
Gateway: KQ4TAB GaMesh.net MQTT (TABQ)
Channel: MediumFast
RSSI: -41 dBm
SNR: 10.75 dBm
Hop Info: 2/5 hops
Start: 5, Limit: 3
Relay Node: 3e PLRG
Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions
Payload Data
Protocol: NODEINFO_APP
Size: 103 bytes
Decoded: Yes
Decoded Data:
Long Name:Athens-Clarke Piedmont Hospital (UM)
Short Name:ACPH
Node ID:!6c3c85e0
MAC Address:8oRsPIXg
Hardware:XIAO_NRF52_KIT
Raw Packet Analysis
Complete field breakdown and MQTT privacy/exposure analysis
Packet Structure
MQTT Packet Flow:
ServiceEnvelope (MQTT layer) → MeshPacket (Mesh layer) → Decoded Payload (Application data)
Total Size:103 bytes
Gateway:!b5b11353
Channel:MediumFast
Payload Type:NODEINFO_APP
Hop Count:2 / 5
Privacy Summary
Exposure Level:
Broadcast
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: MediumFast
+ 1 more...
Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 2 more...
MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

FieldValue
gateway_id !b5b11353
Node ID format
channel_id MediumFast
packet MeshPacket (103 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 1815905760
Source node ID 		uint32
to 4294967295 (Broadcast)
Visible to all nodes 		uint32
decoded.portnum 4
NODEINFO_APP 		enum
decoded.payload_length 103 bytes size
hop_limit 3
Remaining hops allowed 		uint32
hop_start 5
Initial hop limit 		uint32
hops_taken 2
Calculated: hop_start - hop_limit 		derived
rx_rssi -41.0 dBm
Signal strength at gateway 		int32
rx_snr 10.75 dB
Signal quality at gateway 		float
rx_time 1775015742
Receive timestamp 		fixed32
via_mqtt False
Direct LoRa transmission 		bool
want_ack False
No ACK requested 		bool
priority Not set enum
delayed Not set enum
channel Not set uint32
pki_encrypted False
Standard encryption 		bool
next_hop Not set uint32
relay_node 62
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1775015755.6038306
Unix timestamp 		uint32
MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Broadcast
Privacy Features:
  • ✓ Direct LoRa transmission (not via MQTT)
  • ✓ Custom channel: MediumFast
  • ✓ Gateway node ID tracked
Exposure Risks:
  • ⚠ Visible to all nodes on channel
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ Multi-hop path visible (2 hops)
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !b5b11353
Signal Metrics: RSSI: -41.0 dBm
SNR: 10.75 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:NODEINFO_APP
Size:103 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "id": "!6c3c85e0", "long_name": "Athens-Clarke Piedmont Hospital (UM)", "short_name": "ACPH", "macaddr": "8oRsPIXg", "hw_model": "XIAO_NRF52_KIT" }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!b5b11353", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1815905760, "to": 4294967295, "id": 1759176664, "rx_time": 1775015742, "rx_snr": 10.75, "rx_rssi": -41, "hop_limit": 3, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 62, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a092136633363383565301224417468656e732d436c61726b6520506965646d6f6e7420486f73706974616c2028554d291a04414350482206f2846c3c85e0285838024220a31a7c1cf80e3707505f90b18ccccfeb98878c21cd6a3c0b9b0ec921b389fa2f4801", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!6c3c85e0", "long_name": "Athens-Clarke Piedmont Hospital (UM)", "short_name": "ACPH", "macaddr": "8oRsPIXg", "hw_model": "XIAO_NRF52_KIT", "role": "ROUTER", "public_key": "oxp8HPgONwdQX5CxjMzP65iHjCHNajwLmw7JIbOJ+i8=", "is_unmessagable": true, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }
Raw Packet Data (103 bytes)
0a092136633363383565301224417468656e732d436c61726b6520506965646d6f6e7420486f73706974616c2028554d291a04414350482206f2846c3c85e0285838024220a31a7c1cf80e3707505f90b18ccccfeb98878c21cd6a3c0b9b0ec921b389fa2f4801
Hex Analysis:
Size:103 bytes
Format:Protobuf (Protocol Buffers)
Encoding:Binary with varint and length-delimited fields
This is the raw protobuf-encoded payload as received from MQTT. The structure follows the Meshtastic protobuf schema definitions.
All Receptions
All gateways that received this packet
Correlation: Using Mesh Packet ID
Gateway Time Offset RSSI SNR Hops Relay Channel Timestamp Actions
KQ4TAB GaMesh.net MQTT (TABQ) Primary 0.000s
Reference 		-41.0 dBm 10.75 dB 2 3e PLRG MediumFast 2026-04-01 03:55:55 UTC Current
No other receptions found within ±2 seconds
1

Total Receptions

1

Unique Gateways