Packet #3903599

Database ID:	3903599
Mesh Packet ID:	`0xfffbfd2d` Used for correlation across gateways
Timestamp:	2025-07-16 18:41:57 UTC
From Node:	CerdanyolaV04-CL-8 Miguel (CV4C)
To Node:	EA3INU🚗 (J1)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Cardedeu-GW-868 (GC)
Channel:	LongFast
RSSI:	-135 dBm
SNR:	-12.75 dBm
Hop Info:	3/3 hops Start: 3, Limit: 0

Long Name:	CerdanyolaV04-CL-8 Miguel
Short Name:	CV4C
Node ID:	!de7a9235
MAC Address:	/4XeepI1
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:	88 bytes
Gateway:	!06f689ec
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 3

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`	`!06f689ec` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (88 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3732574773` Source node ID	uint32
`to`	`2956780196` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`88` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-135.0` dBm Signal strength at gateway	int32
`rx_snr`	`-12.75` dB Signal quality at gateway	float
`rx_time`	`1752691316` 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`	`1752691317.7407734` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!06f689ec`
Signal Metrics:	RSSI: -135.0 dBm SNR: -12.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	88 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!de7a9235", "long_name": "CerdanyolaV04-CL-8 Miguel", "short_name": "CV4C", "macaddr": "/4XeepI1", "hw_model": "TRACKER_T1000_E" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!06f689ec", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3732574773, "to": 2956780196, "id": 4294704429, "rx_time": 1752691316, "rx_snr": -12.75, "rx_rssi": -135, "hop_limit": 0, "hop_start": 3, "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": "0a09216465376139323335121943657264616e796f6c615630342d434c2d38204d696775656c1a04435634432206ff85de7a923528474220572dc6b3cec50b21b5dae17ceeac544b4ec763aa9abc7ce80ab7ffc60252c636", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!de7a9235", "long_name": "CerdanyolaV04-CL-8 Miguel", "short_name": "CV4C", "macaddr": "/4XeepI1", "hw_model": "TRACKER_T1000_E", "public_key": "Vy3Gs87FCyG12uF87qxUS07HY6qavHzoCrf/xgJSxjY=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (88 bytes)

0a09216465376139323335121943657264616e796f6c615630342d434c2d38204d696775656c1a04435634432206ff85de7a923528474220572dc6b3cec50b21b5dae17ceeac544b4ec763aa9abc7ce80ab7ffc60252c636

Hex Analysis:

Size:	88 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 #3903599 Success

Packet Information

Payload Data

Decoded Data: