Packet #478600

Database ID:	478600
Mesh Packet ID:	`0xe14126c9` Utilizado para correlação entre gateways
Tempo:	2025-10-22 04:20:28 UTC
Do Node:	CartaoCidadao🪪-8🇵🇹 (🪪)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	FARO_Penha-RCC-GW-8 (PNHA)
Canal:	LongFast
RSSI:	-89 dBm
SNR:	4.0 dBm
Info Hop:	1/4 hops Início: 4, Limite: 3

Long Name:	CartaoCidadao🪪-8🇵🇹
Short Name:	🪪
Node ID:	!127cebf3
MAC Address:	63ISfOvz
Hardware:	TRACKER_T1000_E

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:	92 bytes
Gateway:	!c8fc170b
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 4

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`	`!c8fc170b` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (92 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`310176755` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`92` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-89.0` dBm Signal strength at gateway	int32
`rx_snr`	`4.00` dB Signal quality at gateway	float
`rx_time`	`1761103228` 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`	`152` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1761103228.7937582` 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 (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!c8fc170b`
Signal Metrics:	RSSI: -89.0 dBm SNR: 4.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	92 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!127cebf3", "long_name": "CartaoCidadao🪪-8🇵🇹", "short_name": "🪪", "macaddr": "63ISfOvz", "hw_model": "TRACKER_T1000_E" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!c8fc170b", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 310176755, "to": 4294967295, "id": 3779143369, "rx_time": 1761103228, "rx_snr": 4.0, "rx_rssi": -89, "hop_limit": 3, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 152, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213132376365626633121b43617274616f4369646164616ff09faaaa2d38f09f87b5f09f87b91a04f09faaaa2206eb72127cebf3284742205f833f5548ee0afdec1dc99fce1b193a4ff85542b5444342a9bd5ef3f863611a4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!127cebf3", "long_name": "CartaoCidadao🪪-8🇵🇹", "short_name": "🪪", "macaddr": "63ISfOvz", "hw_model": "TRACKER_T1000_E", "public_key": "X4M/VUjuCv3sHcmfzhsZOk/4VUK1RENCqb1e8/hjYRo=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (92 bytes)

0a09213132376365626633121b43617274616f4369646164616ff09faaaa2d38f09f87b5f09f87b91a04f09faaaa2206eb72127cebf3284742205f833f5548ee0afdec1dc99fce1b193a4ff85542b5444342a9bd5ef3f863611a4800

Hex Analysis:

Size:	92 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 #478600 Successo

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