Packet #439046

Database ID:	439046
Mesh Packet ID:	`0x1508957d` Utilizado para correlação entre gateways
Tempo:	2025-10-19 18:43:26 UTC
Do Node:	J_s3 (19d9)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	Fama-17-GT-8-PT (F17)
Canal:	LongFast
RSSI:	-126 dBm
SNR:	-15.5 dBm
Info Hop:	2/3 hops Início: 3, Limite: 1

Long Name:	J_s3
Short Name:	J_s3
Node ID:	!7f9719d9
MAC Address:	2aJ/lxnZ
Hardware:	NRF52_PROMICRO_DIY

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:	71 bytes
Gateway:	!13296f2c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 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
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!13296f2c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (71 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2140608985` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`71` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-126.0` dBm Signal strength at gateway	int32
`rx_snr`	`-15.50` dB Signal quality at gateway	float
`rx_time`	`1760895805` 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`	`146` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760895806.9487853` 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
⚠ Multi-hop path visible (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!13296f2c`
Signal Metrics:	RSSI: -126.0 dBm SNR: -15.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	71 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!7f9719d9", "long_name": "J_s3", "short_name": "J_s3", "macaddr": "2aJ/lxnZ", "hw_model": "NRF52_PROMICRO_DIY" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!13296f2c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2140608985, "to": 4294967295, "id": 352884093, "rx_time": 1760895805, "rx_snr": -15.5, "rx_rssi": -126, "hop_limit": 1, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 146, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921376639373139643912044a5f73331a044a5f73332206d9a27f9719d9283f380c422029541f8760513ae78b574e54836cb3a7820c664e7ee9be1801a920fdbce372754801", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!7f9719d9", "long_name": "J_s3", "short_name": "J_s3", "macaddr": "2aJ/lxnZ", "hw_model": "NRF52_PROMICRO_DIY", "role": "CLIENT_BASE", "public_key": "KVQfh2BROueLV05Ug2yzp4IMZk5+6b4YAakg/bzjcnU=", "is_unmessagable": true, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (71 bytes)

0a0921376639373139643912044a5f73331a044a5f73332206d9a27f9719d9283f380c422029541f8760513ae78b574e54836cb3a7820c664e7ee9be1801a920fdbce372754801

Hex Analysis:

Size:	71 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 #439046 Successo

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Conteúdo dados

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