Packet #469605

Database ID:	469605
Mesh Packet ID:	`0xa532737c` Utilizado para correlação entre gateways
Tempo:	2025-10-21 17:47:19 UTC
Do Node:	Meshtastic 62ec (SVQ1)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	TELEMETRY_APP Port: 67

Gateway:	KOLHF-RL-8🇵🇹 (OLHO)
Canal:	LongFast
RSSI:	-102 dBm
SNR:	-15.5 dBm
Info Hop:	4/4 hops Início: 4, Limite: 0

Bateria:	101%
Voltagem:	4.29 V
Ch Util.:	3.6%
Air Util.:	0.3%

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:	27 bytes
Gateway:	!eba69543
Channel:	LongFast
Payload Type:	TELEMETRY_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
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!eba69543` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (27 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3676922604` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`67` TELEMETRY_APP	enum
`decoded.payload_length`	`27` 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`	`-102.0` dBm Signal strength at gateway	int32
`rx_snr`	`-15.50` dB Signal quality at gateway	float
`rx_time`	`1761065238` 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`	`1` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1761065239.4199398` 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
⚠ Multi-hop path visible (4 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!eba69543`
Signal Metrics:	RSSI: -102.0 dBm SNR: -15.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	TELEMETRY_APP
Size:	27 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "time": 1761065196, "device_metrics": { "battery_level": 101, "voltage": 4.285, "channel_utilization": 3.6299999, "air_util_tx": 0.2853611, "uptime_seconds": 7621 } }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!eba69543", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3676922604, "to": 4294967295, "id": 2771547004, "rx_time": 1761065238, "rx_snr": -15.5, "rx_rssi": -102, "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": 1, "tx_after": 0, "decoded": { "portnum": 67, "payload": "0decb8f7681214086515b81e89401deb51684025da1a923e28c53b", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "time": 1761065196, "device_metrics": { "battery_level": 101, "voltage": 4.285, "channel_utilization": 3.6299999, "air_util_tx": 0.2853611, "uptime_seconds": 7621 }, "type": "protobuf", "portnum": "TELEMETRY_APP", "message_class": "Telemetry" } } } }

Raw Packet Data (27 bytes)

0decb8f7681214086515b81e89401deb51684025da1a923e28c53b

Hex Analysis:

Size:	27 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 #469605 Successo

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