Packet #3920267

Database ID:	3920267
Mesh Packet ID:	`0x1bf16c41` Used for correlation across gateways
Timestamp:	2025-07-16 22:38:40 UTC
From Node:	dB sky (dBs)
To Node:	!ba38d350 (d350)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	[TLGO] Base 📡🌐 (TLG0)
Channel:	LongFast
RSSI:	-112 dBm
SNR:	-5.75 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4

Long Name:	dB sky
Short Name:	dBs
Node ID:	!433f0198
MAC Address:	SMpDPwGY
Hardware:	HELTEC_V3

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:	68 bytes
Gateway:	!da638a24
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`	`!da638a24` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (68 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1128202648` Source node ID	uint32
`to`	`3124286288` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`68` 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`	`-112.0` dBm Signal strength at gateway	int32
`rx_snr`	`-5.75` dB Signal quality at gateway	float
`rx_time`	`1752705518` 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`	`1752705520.9978895` 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:	`!da638a24`
Signal Metrics:	RSSI: -112.0 dBm SNR: -5.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	68 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!433f0198", "long_name": "dB sky", "short_name": "dBs", "macaddr": "SMpDPwGY", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!da638a24", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1128202648, "to": 3124286288, "id": 468806721, "rx_time": 1752705518, "rx_snr": -5.75, "rx_rssi": -112, "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": "0a092134333366303139381206644220736b791a03644273220648ca433f0198282b4220f0f84c56e865040ca66b9958ad7348a851ce5102ac073a1bd407106a77e8ab68", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!433f0198", "long_name": "dB sky", "short_name": "dBs", "macaddr": "SMpDPwGY", "hw_model": "HELTEC_V3", "public_key": "8PhMVuhlBAyma5lYrXNIqFHOUQKsBzob1AcQanfoq2g=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (68 bytes)

0a092134333366303139381206644220736b791a03644273220648ca433f0198282b4220f0f84c56e865040ca66b9958ad7348a851ce5102ac073a1bd407106a77e8ab68

Hex Analysis:

Size:	68 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 #3920267 Success

Packet Information

Payload Data

Decoded Data: