Packet #3985068

Database ID:	3985068
Mesh Packet ID:	`0x665307ba` Used for correlation across gateways
Timestamp:	2025-07-17 17:25:21 UTC
From Node:	Meshtastic 3fdc (3fdc)
To Node:	Meshtastic 9c90 (9c90)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Meshtastic 9c90 (9c90)
Channel:	LongFast
RSSI:	Unknown
SNR:	5.75 dBm
Hop Info:	0/2 hops Start: 2, Limit: 2

Long Name:	Meshtastic 3fdc
Short Name:	3fdc
Node ID:	!b03b3fdc
MAC Address:	NM2wOz/c
Hardware:	HELTEC_V3

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:	!433d9c90
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 2

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!433d9c90` 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`	`2956672988` Source node ID	uint32
`to`	`1128111248` 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`	`2` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	`5.75` dB Signal quality at gateway	float
`rx_time`	`1752773120` 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`	Not set	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752773121.172722` 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
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

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

MQTT-Specific Fields

Gateway ID:	`!433d9c90`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	SNR: 5.75 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": "!b03b3fdc", "long_name": "Meshtastic 3fdc", "short_name": "3fdc", "macaddr": "NM2wOz/c", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433d9c90", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2956672988, "to": 1128111248, "id": 1716717498, "rx_time": 1752773120, "rx_snr": 5.75, "rx_rssi": 0, "hop_limit": 2, "hop_start": 2, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 0, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216230336233666463120f4d65736874617374696320336664631a0433666463220634cdb03b3fdc282b42201ed3166df5052e692e3a92c07b1054891046386c3554327ba0a3e0c6feccd3284800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!b03b3fdc", "long_name": "Meshtastic 3fdc", "short_name": "3fdc", "macaddr": "NM2wOz/c", "hw_model": "HELTEC_V3", "public_key": "HtMWbfUFLmkuOpLAexBUiRBGOGw1VDJ7oKPgxv7M0yg=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (80 bytes)

0a09216230336233666463120f4d65736874617374696320336664631a0433666463220634cdb03b3fdc282b42201ed3166df5052e692e3a92c07b1054891046386c3554327ba0a3e0c6feccd3284800

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.

Packet #3985068 Success

Packet Information

Payload Data

Decoded Data: