Packet #3948938

Database ID:	3948938
Mesh Packet ID:	`0x681e8933` Used for correlation across gateways
Timestamp:	2025-07-17 07:16:50 UTC
From Node:	Lua JSG 2040 3 (JSG3)
To Node:	ROUTER MONTALT 🗻📡 (TALT)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Meshtastic aa4c (aa4c)
Channel:	LongFast
RSSI:	-98 dBm
SNR:	5.75 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4

Long Name:	Lua JSG 2040 3
Short Name:	JSG3
Node ID:	!e7158723
MAC Address:	XAXnFYcj
Hardware:	RP2040_LORA

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:	77 bytes
Gateway:	!43b6aa4c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 5

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 1 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!43b6aa4c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (77 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3876947747` Source node ID	uint32
`to`	`1125725871` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`77` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-98.0` dBm Signal strength at gateway	int32
`rx_snr`	`5.75` dB Signal quality at gateway	float
`rx_time`	`1752736609` 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`	`1752736610.57915` 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
✓ Gateway node ID tracked

Exposure Risks:

⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!43b6aa4c`
Signal Metrics:	RSSI: -98.0 dBm SNR: 5.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	77 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!e7158723", "long_name": "Lua JSG 2040 3", "short_name": "JSG3", "macaddr": "XAXnFYcj", "hw_model": "RP2040_LORA" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!43b6aa4c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3876947747, "to": 1125725871, "id": 1746831667, "rx_time": 1752736609, "rx_snr": 5.75, "rx_rssi": -98, "hop_limit": 4, "hop_start": 5, "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": 4, "payload": "0a09216537313538373233120e4c7561204a5347203230343020331a044a53473322065c05e7158723281e42204df567dab0a02774c0cf6506e4085d66e42b1e0ebbf345a4114b06441ed4bb07", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!e7158723", "long_name": "Lua JSG 2040 3", "short_name": "JSG3", "macaddr": "XAXnFYcj", "hw_model": "RP2040_LORA", "public_key": "TfVn2rCgJ3TAz2UG5AhdZuQrHg6780WkEUsGRB7Uuwc=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (77 bytes)

0a09216537313538373233120e4c7561204a5347203230343020331a044a53473322065c05e7158723281e42204df567dab0a02774c0cf6506e4085d66e42b1e0ebbf345a4114b06441ed4bb07

Hex Analysis:

Size:	77 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 #3948938 Success

Packet Information

Payload Data

Decoded Data: