Packet #719756

Database ID:	719756
Mesh Packet ID:	`0x8b812027` Utilizado para correlação entre gateways
Tempo:	2025-11-04 02:33:06 UTC
Do Node:	CT1CVT-Alfarim-GW-8 (CVT1)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	axsxpt-GW-8 (axgw)
Canal:	LongFast
RSSI:	-107 dBm
SNR:	-6.25 dBm
Info Hop:	3/4 hops Início: 4, Limite: 1

Long Name:	CT1CVT-Alfarim-GW-8
Short Name:	CVT1
Node ID:	!07b0c62b
MAC Address:	98EHsMYr
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:	84 bytes
Gateway:	!433c52a0
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 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`	`!433c52a0` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (84 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`129025579` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`84` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-107.0` dBm Signal strength at gateway	int32
`rx_snr`	`-6.25` dB Signal quality at gateway	float
`rx_time`	`1762223586` 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`	`4` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1762223586.9196677` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!433c52a0`
Signal Metrics:	RSSI: -107.0 dBm SNR: -6.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	84 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!07b0c62b", "long_name": "CT1CVT-Alfarim-GW-8", "short_name": "CVT1", "macaddr": "98EHsMYr", "hw_model": "NRF52_PROMICRO_DIY" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433c52a0", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 129025579, "to": 4294967295, "id": 2340495399, "rx_time": 1762223586, "rx_snr": -6.25, "rx_rssi": -107, "hop_limit": 1, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 4, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921303762306336326212134354314356542d416c666172696d2d47572d381a04435654312206f7c107b0c62b283f42205ff7881599140706a3c8e3f2e7c84f5e160445a0cb69c65c6748a61c000873564800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!07b0c62b", "long_name": "CT1CVT-Alfarim-GW-8", "short_name": "CVT1", "macaddr": "98EHsMYr", "hw_model": "NRF52_PROMICRO_DIY", "public_key": "X/eIFZkUBwajyOPy58hPXhYERaDLacZcZ0imHAAIc1Y=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (84 bytes)

0a0921303762306336326212134354314356542d416c666172696d2d47572d381a04435654312206f7c107b0c62b283f42205ff7881599140706a3c8e3f2e7c84f5e160445a0cb69c65c6748a61c000873564800

Hex Analysis:

Size:	84 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 #719756 Successo

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