Packet #428762

Database ID:	428762
Mesh Packet ID:	`0xb003a650` Utilizado para correlação entre gateways
Tempo:	2025-10-19 09:08:10 UTC
Do Node:	ALFA3000-CL-868 (ALF3)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	AL0-GW-8 (🛜)
Canal:	LongFast
RSSI:	-46 dBm
SNR:	6.75 dBm
Info Hop:	2/3 hops Início: 3, Limite: 1

Long Name:	ALFA3000-CL-868
Short Name:	ALF3
Node ID:	!ba654238
MAC Address:	ECC6ZUI4
Hardware:	HELTEC_WIRELESS_TRACKER

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:	80 bytes
Gateway:	!ea8f88e4
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`	`!ea8f88e4` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (80 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3127198264` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`80` 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`	`-46.0` dBm Signal strength at gateway	int32
`rx_snr`	`6.75` dB Signal quality at gateway	float
`rx_time`	`1760861290` 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`	`81` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760861290.672403` 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:	`!ea8f88e4`
Signal Metrics:	RSSI: -46.0 dBm SNR: 6.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	80 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!ba654238", "long_name": "ALFA3000-CL-868", "short_name": "ALF3", "macaddr": "ECC6ZUI4", "hw_model": "HELTEC_WIRELESS_TRACKER" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!ea8f88e4", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3127198264, "to": 4294967295, "id": 2953029200, "rx_time": 1760861290, "rx_snr": 6.75, "rx_rssi": -46, "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": 81, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216261363534323338120f414c4641333030302d434c2d3836381a04414c463322061020ba65423828304220f1d8186b59016c4ccf319324c51799bdb4e020d7f4fca42e831a76bb79dbde474800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!ba654238", "long_name": "ALFA3000-CL-868", "short_name": "ALF3", "macaddr": "ECC6ZUI4", "hw_model": "HELTEC_WIRELESS_TRACKER", "public_key": "8dgYa1kBbEzPMZMkxReZvbTgINf0/KQugxp2u3nb3kc=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (80 bytes)

0a09216261363534323338120f414c4641333030302d434c2d3836381a04414c463322061020ba65423828304220f1d8186b59016c4ccf319324c51799bdb4e020d7f4fca42e831a76bb79dbde474800

Hex Analysis:

Size:	80 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 #428762 Successo

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