Packet #51643

Database ID:	51643
Mesh Packet ID:	`0x0a8e6027` Utilizado para correlação entre gateways
Tempo:	2025-09-27 17:07:38 UTC
Do Node:	Meshtastic 83c4 (83c4)
Para o Node:	Tortillita de Camarones II 📟 (TCmv)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	KOLHF-RL-8🇵🇹 (OLHO)
Canal:	LongFast
RSSI:	-92 dBm
SNR:	-9.5 dBm
Info Hop:	4/4 hops Início: 4, Limite: 0

Long Name:	Meshtastic 83c4
Short Name:	83c4
Node ID:	!ea8f83c4
MAC Address:	jL/qj4PE
Hardware:	SEEED_XIAO_S3

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:	78 bytes
Gateway:	!eba69543
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	4 / 4

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 1 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!eba69543` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (78 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3935273924` Source node ID	uint32
`to`	`1103466123` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`78` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`4` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-92.0` dBm Signal strength at gateway	int32
`rx_snr`	`-9.50` dB Signal quality at gateway	float
`rx_time`	`1758989257` 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`	`124` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1758989258.7351658` 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

Exposure Risks:

⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (4 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!eba69543`
Signal Metrics:	RSSI: -92.0 dBm SNR: -9.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	78 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!ea8f83c4", "long_name": "Meshtastic 83c4", "short_name": "83c4", "macaddr": "jL/qj4PE", "hw_model": "SEEED_XIAO_S3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!eba69543", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3935273924, "to": 1103466123, "id": 177102887, "rx_time": 1758989257, "rx_snr": -9.5, "rx_rssi": -92, "hop_limit": 0, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 124, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216561386638336334120f4d65736874617374696320383363341a043833633422068cbfea8f83c4285142208436221e473016435d4dc21264881ed0f0996ab9ee10045d4091e45d24668a34", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!ea8f83c4", "long_name": "Meshtastic 83c4", "short_name": "83c4", "macaddr": "jL/qj4PE", "hw_model": "SEEED_XIAO_S3", "public_key": "hDYiHkcwFkNdTcISZIge0PCZarnuEARdQJHkXSRmijQ=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (78 bytes)

0a09216561386638336334120f4d65736874617374696320383363341a043833633422068cbfea8f83c4285142208436221e473016435d4dc21264881ed0f0996ab9ee10045d4091e45d24668a34

Hex Analysis:

Size:	78 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 #51643 Successo

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