Packet #13625561

Database ID:	13625561
Mesh Packet ID:	`0x014efe74` Used for correlation across gateways
Timestamp:	2025-10-04 23:01:53 UTC
From Node:	Sensor Ambiental Crespí📡🌐 (SAC)
To Node:	!9eeca654 (a654)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Fede MQTT-CLM-868 (049c)
Channel:	LongFast
RSSI:	-57 dBm
SNR:	9.5 dBm
Hop Info:	3/3 hops Start: 3, Limit: 0

Long Name:	Sensor Ambiental Crespí📡🌐
Short Name:	SAC
Node ID:	!43594ef8
MAC Address:	SMpDWU74
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:	94 bytes
Gateway:	!f9b9049c
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`	`!f9b9049c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (94 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1129926392` Source node ID	uint32
`to`	`2666309204` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`94` 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`	`-57.0` dBm Signal strength at gateway	int32
`rx_snr`	`9.50` dB Signal quality at gateway	float
`rx_time`	`1759618912` 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`	`234` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1759618913.7119176` 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:	`!f9b9049c`
Signal Metrics:	RSSI: -57.0 dBm SNR: 9.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	94 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!43594ef8", "long_name": "Sensor Ambiental Crespí📡🌐", "short_name": "SAC", "macaddr": "SMpDWU74", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!f9b9049c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1129926392, "to": 2666309204, "id": 21954164, "rx_time": 1759618912, "rx_snr": 9.5, "rx_rssi": -57, "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": 234, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213433353934656638122053656e736f7220416d6269656e74616c204372657370c3adf09f93a1f09f8c901a03534143220648ca43594ef8282b42201b9ea221b8120042dc8e992b647f6fc52640cbacde3fc2c4d7792e979ddd8f65", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!43594ef8", "long_name": "Sensor Ambiental Crespí📡🌐", "short_name": "SAC", "macaddr": "SMpDWU74", "hw_model": "HELTEC_V3", "public_key": "G56iIbgSAELcjpkrZH9vxSZAy6zeP8LE13kul53dj2U=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (94 bytes)

0a09213433353934656638122053656e736f7220416d6269656e74616c204372657370c3adf09f93a1f09f8c901a03534143220648ca43594ef8282b42201b9ea221b8120042dc8e992b647f6fc52640cbacde3fc2c4d7792e979ddd8f65

Hex Analysis:

Size:	94 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 #13625561 Success

Packet Information

Payload Data

Decoded Data: