Pacote #473085 Successo

POSITION_APP packet from FMDM-8 (FMDM) to !ffffffff

6
Total Recepções
6
Gateways Únicos
3
Contagem de Hops
38
Conteúdo Bytes
Informação de Pacotes
Database ID: 473085
Mesh Packet ID: 0x29b9ac4d
Utilizado para correlação entre gateways
Tempo: 2025-10-21 21:32:53 UTC
Do Node: FMDM-8 (FMDM)
Para o Node: !ffffffff (ffff)
Successo: Processado
Protocolo: POSITION_APP
Port: 3
Gateway: CBN-4-CL-868 (END4)
Canal: LongFast
RSSI: -112 dBm
SNR: -8.5 dBm
Info Hop: 3/4 hops
Início: 4, Limite: 1
Conteúdo dados
Protocol:o POSITION_APP
Tamanho: 38 bytes
Decoded: Sim
Dados:
Latitude:38.757990°
Longitude:-9.293005°
Altitude:9645 m
Satelites:4
Precisão:14 bits
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:38 bytes
Gateway:!f1867bf3
Channel:LongFast
Payload Type:POSITION_APP
Hop Count:3 / 4
Privacy Summary
Exposure Level:
Broadcast
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...
Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 3 more...
MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

FieldValue
gateway_id !f1867bf3
Node ID format
channel_id LongFast
Default public channel
packet MeshPacket (38 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 1322176984
Source node ID 		uint32
to 4294967295 (Broadcast)
Visible to all nodes 		uint32
decoded.portnum 3
POSITION_APP 		enum
decoded.payload_length 38 bytes size
hop_limit 1
Remaining hops allowed 		uint32
hop_start 4
Initial hop limit 		uint32
hops_taken 3
Calculated: hop_start - hop_limit 		derived
rx_rssi -112.0 dBm
Signal strength at gateway 		int32
rx_snr -8.50 dB
Signal quality at gateway 		float
rx_time 1761078580
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 254
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1761078773.6059206
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)
  • ✓ Gateway node ID tracked
  • ✓ Reduced position precision: ~1500.0m accuracy
Exposure Risks:
  • ⚠ Visible to all nodes on channel
  • ⚠ Default channel - no encryption
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ Multi-hop path visible (3 hops)
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !f1867bf3
Position Precision: 14 bits (~1500.0m accuracy)
Position precision meters: 1500.0
Signal Metrics: RSSI: -112.0 dBm
SNR: -8.50 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:38 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 38.7579904, "longitude": -9.2930048, "altitude": 9645, "sats_in_view": 4, "precision_bits": 14 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!f1867bf3", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1322176984, "to": 4294967295, "id": 700034125, "rx_time": 1761078580, "rx_snr": -8.5, "rx_rssi": -112, "hop_limit": 1, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 254, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00001a1715000076fa18ad4b2525edf768280258ab037881028001809bee02980104b8010e", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 387579904, "longitude_i": -92930048, "altitude": 9645, "time": 1761078565, "location_source": "LOC_INTERNAL", "PDOP": 427, "ground_speed": 257, "ground_track": 6000000, "sats_in_view": 4, "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (38 bytes)
0d00001a1715000076fa18ad4b2525edf768280258ab037881028001809bee02980104b8010e
Hex Analysis:
Size:38 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
Reception Locations

Loading reception map...

Map shows gateway locations that received this packet. Hop counts are displayed if available.
Gateway Time Offset RSSI SNR Hops Channel Timestamp Actions
CBN-4-CL-868 (END4) Primary 0.000s
Reference 		-112.0 dBm -8.50 dB 3 LongFast 2025-10-21 21:32:53 Current
NPatroni-GW-8 (aba4) -200.107s
Before 		-102.0 dBm -4.50 dB 2 LongFast 2025-10-21 21:29:33 View
HEX-CLM-8🇵🇹 (HEX) -199.960s
Before 		-101.0 dBm 3.50 dB 2 LongFast 2025-10-21 21:29:33 View
VP-8 (ec44) -199.832s
Before 		-112.0 dBm -1.00 dB 2 LongFast 2025-10-21 21:29:33 View
VacuumWorker-G-8 (Vcc4) -198.773s
Before 		-88.0 dBm -5.00 dB 3 LongFast 2025-10-21 21:29:34 View
GZ7d0-GW-01-8 (GZG1) -173.816s
Before 		-131.0 dBm -17.00 dB 4 LongFast 2025-10-21 21:29:59 View
6

Total Receptions

6

Unique Gateways