Packet #3083567

Database ID:	3083567
Mesh Packet ID:	`0x48dbdfcb` Used for correlation across gateways
Timestamp:	2025-07-07 20:43:42 UTC
From Node:	Nauta (auta)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	indaMesh (7efc)
Channel:	LongFast
RSSI:	Unknown
SNR:	6.5 dBm
Hop Info:	0/4 hops Start: 4, Limit: 4

Latitude:	41.399091°
Longitude:	2.156134°
Altitude:	60 m
Precision:	15 bits

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:	27 bytes
Gateway:	!a0cc7efc
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	Unknown / 4

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 2 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!a0cc7efc` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (27 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3758941812` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`27` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	`6.50` dB Signal quality at gateway	float
`rx_time`	`1751921020` 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`	`116` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1751921022.341928` 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
✓ Reduced position precision: ~729.0m accuracy
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

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

MQTT-Specific Fields

Gateway ID:	`!a0cc7efc`
Position Precision:	15 bits (~729.0m accuracy)
Position precision meters:	`729.0`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	SNR: 6.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	27 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 41.3990912, "longitude": 2.1561344, "altitude": 60, "sats_in_view": null, "precision_bits": 15 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!a0cc7efc", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3758941812, "to": 4294967295, "id": 1222369227, "rx_time": 1751921020, "rx_snr": 6.5, "rx_rssi": 0, "hop_limit": 4, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 116, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d0000ad181500004901183c257b316c6828037800800100b8010f", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 413990912, "longitude_i": 21561344, "altitude": 60, "time": 1751921019, "location_source": "LOC_EXTERNAL", "ground_speed": 0, "ground_track": 0, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (27 bytes)

0d0000ad181500004901183c257b316c6828037800800100b8010f

Hex Analysis:

Size:	27 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 #3083567 Success

Packet Information

Payload Data

Decoded Data: