Packet #3803019

Database ID:	3803019
Mesh Packet ID:	`0x1b22bbda` Used for correlation across gateways
Timestamp:	2025-07-15 13:38:43 UTC
From Node:	Planeta X (PX)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	EYI_QTH 🗼🌐 (EYI1)
Channel:	LongFast
RSSI:	-145 dBm
SNR:	-19.25 dBm
Hop Info:	1/7 hops Start: 7, Limit: 6

Latitude:	42.851392°
Longitude:	-2.680786°
Altitude:	644 m
Satellites:	12
Precision:	32 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:	36 bytes
Gateway:	!1d628380
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	1 / 7

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
+ 4 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!1d628380` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (36 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3926558948` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`36` bytes	size
`hop_limit`	`6` Remaining hops allowed	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-145.0` dBm Signal strength at gateway	int32
`rx_snr`	`-19.25` dB Signal quality at gateway	float
`rx_time`	`1752586723` 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`	`1752586723.9394233` 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
⚠ Full GPS precision shared
⚠ Multi-hop path visible (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!1d628380`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -145.0 dBm SNR: -19.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	36 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 42.8513921, "longitude": -2.6807863, "altitude": 644, "sats_in_view": 12, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!1d628380", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3926558948, "to": 4294967295, "id": 455261146, "rx_time": 1752586723, "rx_snr": -19.25, "rx_rssi": -145, "hop_limit": 6, "hop_start": 7, "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": 3, "payload": "0d819a8a1915c9f166fe18840525115a7668280258ee0178078001b0ef2998010cb80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 428513921, "longitude_i": -26807863, "altitude": 644, "time": 1752586769, "location_source": "LOC_INTERNAL", "PDOP": 238, "ground_speed": 7, "ground_track": 686000, "sats_in_view": 12, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (36 bytes)

0d819a8a1915c9f166fe18840525115a7668280258ee0178078001b0ef2998010cb80120

Hex Analysis:

Size:	36 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 #3803019 Success

Packet Information

Payload Data

Decoded Data: