Packet #2620687

Database ID:	2620687
Mesh Packet ID:	`0xdb52eb00` Used for correlation across gateways
Timestamp:	2026-04-03 04:35:59 UTC
From Node:	Veliko Tarnovo 01 (VT01)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	WisMesh Booster (WMB)
Channel:	Bulgaria
RSSI:	-86 dBm
SNR:	7.75 dBm
Hop Info:	0/2 hops Start: 2, Limit: 2
Relay Node:	`1f` VT01 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Latitude:	43.083366°
Longitude:	25.624576°
Altitude:	200 m
Precision:	14 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:	23 bytes
Gateway:	!dce58c09
Channel:	Bulgaria
Payload Type:	POSITION_APP
Hop Count:	Unknown / 2

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: Bulgaria
+ 3 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!dce58c09` Node ID format
`channel_id`	`Bulgaria`
`packet`	`MeshPacket` (23 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`4147553055` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`23` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`2` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-86.0` dBm Signal strength at gateway	int32
`rx_snr`	`7.75` dB Signal quality at gateway	float
`rx_time`	`1775190947` 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`	`31` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1775190959.559198` 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)
✓ Custom channel: Bulgaria
✓ Gateway node ID tracked
✓ Reduced position precision: ~1500.0m accuracy
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!dce58c09`
Position Precision:	14 bits (~1500.0m accuracy)
Position precision meters:	`1500.0`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -86.0 dBm SNR: 7.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	23 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 43.0833664, "longitude": 25.624576, "altitude": 200, "sats_in_view": null, "precision_bits": 14 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!dce58c09", "channel_id": "Bulgaria", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 4147553055, "to": 4294967295, "id": 3679644416, "rx_time": 1775190947, "rx_snr": 7.75, "rx_rssi": -86, "hop_limit": 2, "hop_start": 2, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 31, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d0000ae19150000460f18c80128017800800100b8010e", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 430833664, "longitude_i": 256245760, "altitude": 200, "location_source": "LOC_MANUAL", "ground_speed": 0, "ground_track": 0, "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (23 bytes)

0d0000ae19150000460f18c80128017800800100b8010e

Hex Analysis:

Size:	23 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 #2620687 Success

Packet Information

Payload Data

Decoded Data: