Pacote #323090 Successo

POSITION_APP packet from rnd2-GW-8 (rnd2) to Meshtastic 126c (126c)

1
Total Recepções
1
Gateways Únicos
0
Contagem de Hops
20
Conteúdo Bytes
Informação de Pacotes
Database ID: 323090
Mesh Packet ID: 0x73c952bb
Utilizado para correlação entre gateways
Tempo: 2025-10-12 23:33:26 UTC
Do Node: rnd2-GW-8 (rnd2)
Para o Node: Meshtastic 126c (126c)
Successo: Processado
Protocolo: POSITION_APP
Port: 3
Gateway: rnd1-CL-8 (rnd1)
Canal: LongFast
RSSI: -93 dBm
SNR: 4.75 dBm
Info Hop: 0/3 hops
Início: 3, Limite: 3
Conteúdo dados
Protocol:o POSITION_APP
Tamanho: 20 bytes
Decoded: Sim
Dados:
Latitude:39.465779°
Longitude:-8.192000°
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:20 bytes
Gateway:!a0cb145c
Channel:LongFast
Payload Type:POSITION_APP
Hop Count:Unknown / 3
Privacy Summary
Exposure Level:
Direct Message
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 3 more...
Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 1 more...
MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

FieldValue
gateway_id !a0cb145c
Node ID format
channel_id LongFast
Default public channel
packet MeshPacket (20 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 2224737536
Source node ID 		uint32
to 472846956
Target node ID 		uint32
decoded.portnum 3
POSITION_APP 		enum
decoded.payload_length 20 bytes size
hop_limit 3
Remaining hops allowed 		uint32
hop_start 3
Initial hop limit 		uint32
hops_taken 0
Calculated: hop_start - hop_limit 		derived
rx_rssi -93.0 dBm
Signal strength at gateway 		int32
rx_snr 4.75 dB
Signal quality at gateway 		float
rx_time 1760308405
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 255
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1760308406.947611
Unix timestamp 		uint32
MQTT Privacy & Exposure Analysis

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

Exposure Level: Direct Message
Privacy Features:
  • ✓ Direct LoRa transmission (not via MQTT)
  • ✓ Targeted to specific node
  • ✓ Gateway node ID tracked
  • ✓ Reduced position precision: ~1500.0m accuracy
  • ✓ Zero-hop: direct from source to MQTT gateway
Exposure Risks:
  • ⚠ Default channel - no encryption
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !a0cb145c
Position Precision: 14 bits (~1500.0m accuracy)
Position precision meters: 1500.0
Zero Hop Policy: Enabled
Direct gateway connection
Signal Metrics: RSSI: -93.0 dBm
SNR: 4.75 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:20 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 39.4657792, "longitude": -8.192, "altitude": null, "sats_in_view": null, "precision_bits": 14 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!a0cb145c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2224737536, "to": 472846956, "id": 1942573755, "rx_time": 1760308405, "rx_snr": 4.75, "rx_rssi": -93, "hop_limit": 3, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 255, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d000086171500001efb25382cec682801b8010e", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 394657792, "longitude_i": -81920000, "time": 1760308280, "location_source": "LOC_MANUAL", "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (20 bytes)
0d000086171500001efb25382cec682801b8010e
Hex Analysis:
Size:20 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 Channel Timestamp Actions
rnd1-CL-8 (rnd1) Primary 0.000s
Reference 		-93.0 dBm 4.75 dB 0 LongFast 2025-10-12 23:33:26 Current
No other receptions found within ±2 seconds
1

Total Receptions

1

Unique Gateways