Packet #98011

Database ID:	98011
Mesh Packet ID:	`0x94c3b5f2` Utilizado para correlação entre gateways
Tempo:	2025-09-30 12:06:51 UTC
Do Node:	EA7DYY-R 🗼🛰️ (Yago)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	POSITION_APP Port: 3

Gateway:	Infam0us:🐐-8 (🐐)
Canal:	LongFast
RSSI:	-121 dBm
SNR:	-10.5 dBm
Info Hop:	2/6 hops Início: 6, Limite: 4

Latitude:	36.836470°
Longitude:	-5.952440°
Altitude:	475 m
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:	30 bytes
Gateway:	!b45a3a85
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	2 / 6

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`	`!b45a3a85` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (30 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2956752048` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`30` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`6` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-121.0` dBm Signal strength at gateway	int32
`rx_snr`	`-10.50` dB Signal quality at gateway	float
`rx_time`	`1759220963` 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`	`1759230411.9040215` 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 (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!b45a3a85`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -121.0 dBm SNR: -10.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	30 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 36.83647, "longitude": -5.95244, "altitude": 475, "sats_in_view": null, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!b45a3a85", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2956752048, "to": 4294967295, "id": 2495854066, "rx_time": 1759220963, "rx_snr": -10.5, "rx_rssi": -121, "hop_limit": 4, "hop_start": 6, "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": "0d9cccf41515d0ba73fc18db0325e194db68280150007800800100b80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 368364700, "longitude_i": -59524400, "altitude": 475, "time": 1759220961, "location_source": "LOC_MANUAL", "altitude_geoidal_separation": 0, "ground_speed": 0, "ground_track": 0, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (30 bytes)

0d9cccf41515d0ba73fc18db0325e194db68280150007800800100b80120

Hex Analysis:

Size:	30 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.

Pacote #98011 Successo

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