Packet #348984

Database ID:	348984
Mesh Packet ID:	`0xec394f39` Utilizado para correlação entre gateways
Tempo:	2025-10-14 17:56:37 UTC
Do Node:	Eagle1-CL-868 (Eagl)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	POSITION_APP Port: 3

Gateway:	PortoFoz-GW-8 (Foz8)
Canal:	LongFast
RSSI:	-138 dBm
SNR:	-18.75 dBm
Info Hop:	1/3 hops Início: 3, Limite: 2

Latitude:	41.077985°
Longitude:	-8.620388°
Altitude:	79 m
Satelites:	6
Precisão:	32 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:	36 bytes
Gateway:	!d1c7ceb8
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	1 / 3

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 4 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!d1c7ceb8` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (36 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`4145976564` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`36` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-138.0` dBm Signal strength at gateway	int32
`rx_snr`	`-18.75` dB Signal quality at gateway	float
`rx_time`	`1760460996` 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`	`56` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760460997.7796252` 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

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Full GPS precision shared
⚠ Multi-hop path visible (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!d1c7ceb8`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -138.0 dBm SNR: -18.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	36 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 41.0779855, "longitude": -8.6203883, "altitude": 79, "sats_in_view": 6, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!d1c7ceb8", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 4145976564, "to": 4294967295, "id": 3963178809, "rx_time": 1760460996, "rx_snr": -18.75, "rx_rssi": -138, "hop_limit": 2, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 56, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0dcf007c181515a2dcfa184f25bc80ee68280258a4037800800188f2de02980106b80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 410779855, "longitude_i": -86203883, "altitude": 79, "time": 1760460988, "location_source": "LOC_INTERNAL", "PDOP": 420, "ground_speed": 0, "ground_track": 5749000, "sats_in_view": 6, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (36 bytes)

0dcf007c181515a2dcfa184f25bc80ee68280258a4037800800188f2de02980106b80120

Hex Analysis:

Size:	36 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.

Pacote #348984 Successo

Informação de Pacotes

Conteúdo dados

Dados: