Packet #424321

Database ID:	424321
Mesh Packet ID:	`0x19343709` Utilizado para correlação entre gateways
Tempo:	2025-10-19 02:51:42 UTC
Do Node:	🥷draft🇵🇹-CL-868 (🥷)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	POSITION_APP Port: 3

Gateway:	CT1EMY-CL-8 (EMY8)
Canal:	LongFast
RSSI:	-125 dBm
SNR:	-13.5 dBm
Info Hop:	2/4 hops Início: 4, Limite: 2

Latitude:	38.757990°
Longitude:	-9.266790°
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:	23 bytes
Gateway:	!d5219a59
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	2 / 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

Field	Value
`gateway_id`	`!d5219a59` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (23 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3170188975` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`23` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-125.0` dBm Signal strength at gateway	int32
`rx_snr`	`-13.50` dB Signal quality at gateway	float
`rx_time`	`1760837805` 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`	`135` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760838702.6404936` 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 (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!d5219a59`
Position Precision:	14 bits (~1500.0m accuracy)
Position precision meters:	`1500.0`
Signal Metrics:	RSSI: -125.0 dBm SNR: -13.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	23 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 38.7579904, "longitude": -9.2667904, "altitude": null, "sats_in_view": null, "precision_bits": 14 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!d5219a59", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3170188975, "to": 4294967295, "id": 422852361, "rx_time": 1760837805, "rx_snr": -13.5, "rx_rssi": -125, "hop_limit": 2, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 135, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00001a171500007afa25c040f4682802588706b8010e", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 387579904, "longitude_i": -92667904, "time": 1760837824, "location_source": "LOC_INTERNAL", "PDOP": 775, "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (23 bytes)

0d00001a171500007afa25c040f4682802588706b8010e

Hex Analysis:

Size:	23 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.

Gateway	Time Offset	RSSI	SNR	Hops	Channel	Timestamp	Actions
CT1EMY-CL-8 (EMY8) Primary	0.000s Reference	-125.0 dBm	-13.50 dB	2	LongFast	2025-10-19 02:51:42	Current
☣️JHR#1-CL-8 (JHR1)	-900.608s Before	-106.0 dBm	3.00 dB	0	LongFast	2025-10-19 02:36:42	View
SenhorDosPacotes-CL-8 (SRDP)	-898.745s Before	-125.0 dBm	-18.25 dB	2	LongFast	2025-10-19 02:36:43	View
TVD0-GT-8 (TVD0)	+23939.844s After	-114.0 dBm	1.75 dB	3	LongFast	2025-10-19 09:30:42	View

Pacote #424321 Successo

Informação de Pacotes

Conteúdo dados

Dados: