Packet #176643

Database ID:	176643
Mesh Packet ID:	`0x4d105d4c` Utilizado para correlação entre gateways
Tempo:	2025-10-04 15:20:38 UTC
Do Node:	CS9ABS-CL-868 (🏕)
Para o Node:	SaojorgeN.Madeira-GW-868 (🌐)
Successo:	Processado
Protocolo:	POSITION_APP Port: 3

Gateway:	Farrobo44-GW-868 (📡)
Canal:	LongFast
RSSI:	-116 dBm
SNR:	-10.5 dBm
Info Hop:	0/0 hops Início: 0, Limite: 0

Latitude:	32.824186°
Longitude:	-16.922111°
Altitude:	504 m
Satelites:	12

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:	34 bytes
Gateway:	!bd5033d4
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	Unknown / Unknown

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 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

Field	Value
`gateway_id`	`!bd5033d4` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (34 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2854208973` Source node ID	uint32
`to`	`1136082628` Target node ID	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`34` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	Not set	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-116.0` dBm Signal strength at gateway	int32
`rx_snr`	`-10.50` dB Signal quality at gateway	float
`rx_time`	`1759587314` 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`	Not set	uint32
`tx_after`	Not set	uint32
`timestamp`	`1759587638.9601784` 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
✓ 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:	`!bd5033d4`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -116.0 dBm SNR: -10.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	34 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 32.8241864, "longitude": -16.9221115, "altitude": 504, "sats_in_view": 12, "precision_bits": null }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!bd5033d4", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2854208973, "to": 1136082628, "id": 1292918092, "rx_time": 1759587314, "rx_snr": -10.5, "rx_rssi": -116, "hop_limit": 0, "hop_start": 0, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 0, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0dc89290131505e4e9f518f80325f42be16828033df42be16878008001af0298010c", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 328241864, "longitude_i": -169221115, "altitude": 504, "time": 1759587316, "location_source": "LOC_EXTERNAL", "timestamp": 1759587316, "ground_speed": 0, "ground_track": 303, "sats_in_view": 12, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (34 bytes)

0dc89290131505e4e9f518f80325f42be16828033df42be16878008001af0298010c

Hex Analysis:

Size:	34 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 #176643 Successo

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