Packet #107453

Database ID:	107453
Mesh Packet ID:	`0x3c90ded1` Utilizado para correlação entre gateways
Tempo:	2025-09-30 23:45:29 UTC
Do Node:	CR7BMR#2RP-CL-868🇵🇹 (BMR2)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	POSITION_APP Port: 3

Gateway:	os5T-8j🇵🇹 (os5T)
Canal:	LongFast
RSSI:	-106 dBm
SNR:	-11.75 dBm
Info Hop:	4/4 hops Início: 4, Limite: 0

Latitude:	38.665286°
Longitude:	-9.143658°
Precisão:	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:	22 bytes
Gateway:	!8ec3a2d8
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	4 / 4

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`	`!8ec3a2d8` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (22 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3659132847` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`22` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`4` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-106.0` dBm Signal strength at gateway	int32
`rx_snr`	`-11.75` dB Signal quality at gateway	float
`rx_time`	`1759272329` 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`	`135` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1759272329.7305284` 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 (4 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!8ec3a2d8`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -106.0 dBm SNR: -11.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	22 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 38.665286, "longitude": -9.1436578, "altitude": 0, "sats_in_view": null, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!8ec3a2d8", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3659132847, "to": 4294967295, "id": 1016127185, "rx_time": 1759272329, "rx_snr": -11.75, "rx_rssi": -106, "hop_limit": 0, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 135, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0dbcda0b1715dec98cfa180028017800800100b80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 386652860, "longitude_i": -91436578, "altitude": 0, "location_source": "LOC_MANUAL", "ground_speed": 0, "ground_track": 0, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (22 bytes)

0dbcda0b1715dec98cfa180028017800800100b80120

Hex Analysis:

Size:	22 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.

Gateway	Time Offset	RSSI	SNR	Hops	Channel	Timestamp	Actions
os5T-8j🇵🇹 (os5T) Primary	0.000s Reference	-106.0 dBm	-11.75 dB	4	LongFast	2025-09-30 23:45:29	Current
SC0UT-8 (5C4P)	-5.707s Before	-107.0 dBm	-18.25 dB	1	LongFast	2025-09-30 23:45:24	View
☣️JHR#1-CL-8 (JHR1)	+0.114s After	-109.0 dBm	1.00 dB	4	LongFast	2025-09-30 23:45:29	View
CT1EDG-CL-8🇵🇹 (EDG1)	+314.205s After	-112.0 dBm	-1.75 dB	4	LongFast	2025-09-30 23:50:43	View

Pacote #107453 Successo

Informação de Pacotes

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