Packet #3920004

Database ID:	3920004
Mesh Packet ID:	`0xee6d49e2` Used for correlation across gateways
Timestamp:	2025-07-16 22:34:34 UTC
From Node:	Network TBeam (🖥)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Meshtastic aa4c (aa4c)
Channel:	LongFast
RSSI:	-98 dBm
SNR:	4.75 dBm
Hop Info:	3/5 hops Start: 5, Limit: 2

Latitude:	39.655834°
Longitude:	-0.425984°
Altitude:	181 m
Satellites:	5
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:	46 bytes
Gateway:	!43b6aa4c
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	3 / 5

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...

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`	`!43b6aa4c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (46 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1819542308` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`46` 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`	`-98.0` dBm Signal strength at gateway	int32
`rx_snr`	`4.75` dB Signal quality at gateway	float
`rx_time`	`1752705273` 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`	`1752705274.1015608` 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

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:	`!43b6aa4c`
Position Precision:	15 bits (~729.0m accuracy)
Position precision meters:	`729.0`
Signal Metrics:	RSSI: -98.0 dBm SNR: 4.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	46 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 39.6558336, "longitude": -0.425984, "altitude": 181, "sats_in_view": 5, "precision_bits": 15 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!43b6aa4c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1819542308, "to": 4294967295, "id": 4000139746, "rx_time": 1752705273, "rx_snr": 4.75, "rx_rssi": -98, "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": 3, "payload": "0d0000a317150000bfff18b50125e228786828023d7f2078685064609d027807800190b45c980105b00103b8010f", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 396558336, "longitude_i": -4259840, "altitude": 181, "time": 1752705250, "location_source": "LOC_INTERNAL", "timestamp": 1752703103, "altitude_geoidal_separation": 50, "HDOP": 285, "ground_speed": 7, "ground_track": 1514000, "sats_in_view": 5, "seq_number": 3, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (46 bytes)

0d0000a317150000bfff18b50125e228786828023d7f2078685064609d027807800190b45c980105b00103b8010f

Hex Analysis:

Size:	46 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 #3920004 Success

Packet Information

Payload Data

Decoded Data: