Packet #13444575

Database ID:	13444575
Mesh Packet ID:	`0xa7e114d3` Used for correlation across gateways
Timestamp:	2025-10-03 19:10:55 UTC
From Node:	LENO-01-MQTT (LENO)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Sensor Ambiental Crespí📡🌐 (SAC)
Channel:	LongFast
RSSI:	-126 dBm
SNR:	-19.75 dBm
Hop Info:	2/3 hops Start: 3, Limit: 1

Long Name:	LENO-01-MQTT
Short Name:	LENO
Node ID:	!43b7a148
MAC Address:	SMpDt6FI
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:	75 bytes
Gateway:	!43594ef8
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 3

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`	`!43594ef8` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (75 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1136107848` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`75` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-126.0` dBm Signal strength at gateway	int32
`rx_snr`	`-19.75` dB Signal quality at gateway	float
`rx_time`	`1759518654` 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`	`1759518655.7083972` 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 (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!43594ef8`
Signal Metrics:	RSSI: -126.0 dBm SNR: -19.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	75 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!43b7a148", "long_name": "LENO-01-MQTT", "short_name": "LENO", "macaddr": "SMpDt6FI", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!43594ef8", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1136107848, "to": 4294967295, "id": 2816546003, "rx_time": 1759518654, "rx_snr": -19.75, "rx_rssi": -126, "hop_limit": 1, "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": "0a09213433623761313438120c4c454e4f2d30312d4d5154541a044c454e4f220648ca43b7a148282b422067f4f5edbf654a2e22b6719a37699e8c35a63bf23757bfea0271e8fbf1c5a40b", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!43b7a148", "long_name": "LENO-01-MQTT", "short_name": "LENO", "macaddr": "SMpDt6FI", "hw_model": "HELTEC_V3", "public_key": "Z/T17b9lSi4itnGaN2mejDWmO/I3V7/qAnHo+/HFpAs=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (75 bytes)

0a09213433623761313438120c4c454e4f2d30312d4d5154541a044c454e4f220648ca43b7a148282b422067f4f5edbf654a2e22b6719a37699e8c35a63bf23757bfea0271e8fbf1c5a40b

Hex Analysis:

Size:	75 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 #13444575 Success

Packet Information

Payload Data

Decoded Data: