Packet #2529107

Database ID:	2529107
Mesh Packet ID:	`0xfdc42371` Used for correlation across gateways
Timestamp:	2026-03-27 09:51:55 UTC
From Node:	tStamenova SCap 2ace (tSSC)
To Node:	iTushev SenseCAP a00c (iTSC)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	CityMesh (City)
Channel:	Bulgaria
RSSI:	-119 dBm
SNR:	-8.25 dBm
Hop Info:	1/2 hops Start: 2, Limit: 1
Relay Node:	`fc` AP02 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Latitude:	41.557085°
Longitude:	23.274280°
Altitude:	227 m
Satellites:	15
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:	!a0cbb8ac
Channel:	Bulgaria
Payload Type:	POSITION_APP
Hop Count:	1 / 2

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 more...

Exposure Risks:
⚠ Packet visible to MQTT subscribers
⚠ Full GPS precision shared
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!a0cbb8ac` Node ID format
`channel_id`	`Bulgaria`
`packet`	`MeshPacket` (36 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3379243726` Source node ID	uint32
`to`	`2920652812` Target node ID	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`36` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`2` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-119.0` dBm Signal strength at gateway	int32
`rx_snr`	`-8.25` dB Signal quality at gateway	float
`rx_time`	`1774605113` 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`	`12` Next hop node ID	uint32
`relay_node`	`252` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1774605115.4322925` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Direct Message

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
✓ Custom channel: Bulgaria
✓ Gateway node ID tracked

Exposure Risks:

⚠ 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:	`!a0cbb8ac`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -119.0 dBm SNR: -8.25 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": 41.557085, "longitude": 23.27428, "altitude": 227, "sats_in_view": 15, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!a0cbb8ac", "channel_id": "Bulgaria", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3379243726, "to": 2920652812, "id": 4257489777, "rx_time": 1774605113, "rx_snr": -8.25, "rx_rssi": -119, "hop_limit": 1, "hop_start": 2, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 12, "relay_node": 252, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0da21bc51815905fdf0d18e301253a53c6692802587278008001c884a60c98010fb80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 415570850, "longitude_i": 232742800, "altitude": 227, "time": 1774605114, "location_source": "LOC_INTERNAL", "PDOP": 114, "ground_speed": 0, "ground_track": 25789000, "sats_in_view": 15, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (36 bytes)

0da21bc51815905fdf0d18e301253a53c6692802587278008001c884a60c98010fb80120

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 #2529107 Success

Packet Information

Payload Data

Decoded Data: