Packet #2182

Database ID:	2182
Mesh Packet ID:	`0x20b30f9e` Utilizado para correlação entre gateways
Tempo:	2025-09-25 01:58:46 UTC
Do Node:	Meshtastic 070c (070c)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	Prewashed24-CL-8 (PW24)
Canal:	LongFast
RSSI:	-57 dBm
SNR:	7.0 dBm
Info Hop:	5/5 hops Início: 5, Limite: 0

Long Name:	Meshtastic 070c
Short Name:	070c
Node ID:	!db2f070c
MAC Address:	EFHbLwcM
Hardware:	HELTEC_V3

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:	82 bytes
Gateway:	!75d5ee78
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	5 / 5

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`	`!75d5ee78` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (82 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3677292300` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`82` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`5` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-57.0` dBm Signal strength at gateway	int32
`rx_snr`	`7.00` dB Signal quality at gateway	float
`rx_time`	`1758761927` 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`	`73` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1758761926.9946444` 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 (5 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!75d5ee78`
Signal Metrics:	RSSI: -57.0 dBm SNR: 7.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	82 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!db2f070c", "long_name": "Meshtastic 070c", "short_name": "070c", "macaddr": "EFHbLwcM", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!75d5ee78", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3677292300, "to": 4294967295, "id": 548605854, "rx_time": 1758761927, "rx_snr": 7.0, "rx_rssi": -57, "hop_limit": 0, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 73, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216462326630373063120f4d65736874617374696320303730631a043037306322061051db2f070c282b3801422042dbe257b29e58959fd91b12f2c4fcd97f252c9543f42100fb35770041407a7f4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!db2f070c", "long_name": "Meshtastic 070c", "short_name": "070c", "macaddr": "EFHbLwcM", "hw_model": "HELTEC_V3", "role": "CLIENT_MUTE", "public_key": "QtviV7KeWJWf2RsS8sT82X8lLJVD9CEA+zV3AEFAen8=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (82 bytes)

0a09216462326630373063120f4d65736874617374696320303730631a043037306322061051db2f070c282b3801422042dbe257b29e58959fd91b12f2c4fcd97f252c9543f42100fb35770041407a7f4800

Hex Analysis:

Size:	82 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 #2182 Successo

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