Packet #3961541

Database ID:	3961541
Mesh Packet ID:	`0x2e837a31` Used for correlation across gateways
Timestamp:	2025-07-17 11:01:10 UTC
From Node:	AGM-SVH0🗼☀️ (SVH0)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	TELEMETRY_APP Port: 67

Gateway:	Cardedeu-GW-868 (GC)
Channel:	LongFast
RSSI:	-135 dBm
SNR:	-13.25 dBm
Hop Info:	3/5 hops Start: 5, Limit: 2

Temperature:	38.7°C
Pressure:	1012.9 hPa

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:	17 bytes
Gateway:	!06f689ec
Channel:	LongFast
Payload Type:	TELEMETRY_APP
Hop Count:	3 / 5

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`	`!06f689ec` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (17 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1616353048` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`67` TELEMETRY_APP	enum
`decoded.payload_length`	`17` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`5` 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`	`-13.25` dB Signal quality at gateway	float
`rx_time`	`1752750069` 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`	`1752750070.9012153` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!06f689ec`
Signal Metrics:	RSSI: -135.0 dBm SNR: -13.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	TELEMETRY_APP
Size:	17 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "time": 1752750061, "environment_metrics": { "temperature": 38.73, "barometric_pressure": 1012.861 } }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!06f689ec", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1616353048, "to": 4294967295, "id": 780368433, "rx_time": 1752750069, "rx_snr": -13.25, "rx_rssi": -135, "hop_limit": 2, "hop_start": 5, "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": 67, "payload": "0dedd778681a0a0d85eb1a421d1b377d44", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "time": 1752750061, "environment_metrics": { "temperature": 38.73, "barometric_pressure": 1012.861 }, "type": "protobuf", "portnum": "TELEMETRY_APP", "message_class": "Telemetry" } } } }

Raw Packet Data (17 bytes)

0dedd778681a0a0d85eb1a421d1b377d44

Hex Analysis:

Size:	17 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.

Gateway	Time Offset	RSSI	SNR	Hops	Channel	Timestamp	Actions
Cardedeu-GW-868 (GC) Primary	0.000s Reference	-135.0 dBm	-13.25 dB	3	LongFast	2025-07-17 11:01:10	Current
XDCP-GW2-8 (XDC3)	+0.881s After	-122.0 dBm	-20.50 dB	4	LongFast	2025-07-17 11:01:11	View
EB3FWC-Girona📡-GW-868 (EB3F)	+0.902s After	-88.0 dBm	-4.00 dB	4	LongFast	2025-07-17 11:01:11	View
CV-Oriol-GW-8 📡 (CVO2)	+1.673s After	-101.0 dBm	4.50 dB	4	LongFast	2025-07-17 11:01:12	View
MontcadaCentro-CL-868🗼🌐 (d9e8)	+381.700s After	-112.0 dBm	-12.75 dB	3	LongFast	2025-07-17 11:07:32	View

Packet #3961541 Success

Packet Information

Payload Data

Decoded Data:

Environment Metrics: