Packet #430386

Database ID:	430386
Mesh Packet ID:	`0xa41c460c` Utilizado para correlação entre gateways
Tempo:	2025-10-19 10:24:38 UTC
Do Node:	Teknob-CL-868 (Tknb)
Para o Node:	!ffffffff (ffff)
Successo:	Processado
Protocolo:	TELEMETRY_APP Port: 67

Gateway:	Mr Meshtastik-CL-868 (AP8)
Canal:	LongFast
RSSI:	-127 dBm
SNR:	-17.75 dBm
Info Hop:	4/4 hops Início: 4, Limite: 0

Temperatura:	23.1°C
Humidade:	54.1%
Pressão:	1003.4 hPa

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:	!433a6dd0
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`	`!433a6dd0` 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`	`4201495564` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`67` TELEMETRY_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`	`-127.0` dBm Signal strength at gateway	int32
`rx_snr`	`-17.75` dB Signal quality at gateway	float
`rx_time`	`1760863399` 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`	`39` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1760865878.1603475` 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:	`!433a6dd0`
Signal Metrics:	RSSI: -127.0 dBm SNR: -17.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	TELEMETRY_APP
Size:	22 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "time": 1756568272, "environment_metrics": { "temperature": 23.08, "relative_humidity": 54.11133, "barometric_pressure": 1003.3533 } }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433a6dd0", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 4201495564, "to": 4294967295, "id": 2753316364, "rx_time": 1760863399, "rx_snr": -17.75, "rx_rssi": -127, "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": 39, "tx_after": 0, "decoded": { "portnum": 67, "payload": "0dd01ab3681a0f0dd7a3b84115007258421d9cd67a44", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "time": 1756568272, "environment_metrics": { "temperature": 23.08, "relative_humidity": 54.11133, "barometric_pressure": 1003.3533 }, "type": "protobuf", "portnum": "TELEMETRY_APP", "message_class": "Telemetry" } } } }

Raw Packet Data (22 bytes)

0dd01ab3681a0f0dd7a3b84115007258421d9cd67a44

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.

Pacote #430386 Successo

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