Packet #101568

Database ID:	101568
Mesh Packet ID:	`0x37164582` Utilizado para correlação entre gateways
Tempo:	2025-09-30 16:36:48 UTC
Do Node:	Pirrao01-CL-868 (Prr1)
Para o Node:	!b03d68ec (68ec)
Successo:	Processado
Protocolo:	NODEINFO_APP Port: 4

Gateway:	CR7BUI-CL-8 (7BUI)
Canal:	LongFast
RSSI:	-74 dBm
SNR:	6.5 dBm
Info Hop:	2/4 hops Início: 4, Limite: 2

Long Name:	Pirrao01-CL-868
Short Name:	Prr1
Node ID:	!75fbab96
MAC Address:	7B11+6uW
Hardware:	T_ECHO

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:	!ba6a711c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 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`	`!ba6a711c` 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`	`1979427734` Source node ID	uint32
`to`	`2956814572` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`80` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-74.0` dBm Signal strength at gateway	int32
`rx_snr`	`6.50` dB Signal quality at gateway	float
`rx_time`	`1759246584` 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`	`80` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1759246608.252245` 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 (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!ba6a711c`
Signal Metrics:	RSSI: -74.0 dBm SNR: 6.50 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": "!75fbab96", "long_name": "Pirrao01-CL-868", "short_name": "Prr1", "macaddr": "7B11+6uW", "hw_model": "T_ECHO" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!ba6a711c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1979427734, "to": 2956814572, "id": 924206466, "rx_time": 1759246584, "rx_snr": 6.5, "rx_rssi": -74, "hop_limit": 2, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 80, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213735666261623936120f50697272616f30312d434c2d3836381a04507272312206ec1d75fbab962807422075ad7728c18027efdc6c39f79b55d0a5db63ad27937f74072460a50498db0a4e4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!75fbab96", "long_name": "Pirrao01-CL-868", "short_name": "Prr1", "macaddr": "7B11+6uW", "hw_model": "T_ECHO", "public_key": "da13KMGAJ+/cbDn3m1XQpdtjrSeTf3QHJGClBJjbCk4=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (80 bytes)

0a09213735666261623936120f50697272616f30312d434c2d3836381a04507272312206ec1d75fbab962807422075ad7728c18027efdc6c39f79b55d0a5db63ad27937f74072460a50498db0a4e4800

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 #101568 Successo

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