Packet #3120028

Database ID:	3120028
Mesh Packet ID:	`0x70787b27` Used for correlation across gateways
Timestamp:	2025-08-19 18:27:58 UTC
From Node:	Matrixed S2 (MxS2)
To Node:	Hans Mobiel 1 📟🛰️ (HVI1)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Meshtastic 7c28 (7c28)
Channel:	LongFast
RSSI:	-133 dBm
SNR:	-17.5 dBm
Hop Info:	1/3 hops Start: 3, Limit: 2

Long Name:	Matrixed S2
Short Name:	MxS2
Node ID:	!fa9dc3d0
MAC Address:	9BL6ncPQ
Hardware:	LILYGO_TBEAM_S3_CORE

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:	40 bytes
Gateway:	!9ea67c28
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 3

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`	`!9ea67c28` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (40 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`4204643280` Source node ID	uint32
`to`	`3926677284` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`40` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-133.0` dBm Signal strength at gateway	int32
`rx_snr`	`-17.50` dB Signal quality at gateway	float
`rx_time`	`1755620726` 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`	`1755620878.3315864` 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:	`!9ea67c28`
Signal Metrics:	RSSI: -133.0 dBm SNR: -17.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	40 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!fa9dc3d0", "long_name": "Matrixed S2", "short_name": "MxS2", "macaddr": "9BL6ncPQ", "hw_model": "LILYGO_TBEAM_S3_CORE" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!9ea67c28", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 4204643280, "to": 3926677284, "id": 1886944039, "rx_time": 1755620726, "rx_snr": -17.5, "rx_rssi": -133, "hop_limit": 2, "hop_start": 3, "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": "0a09216661396463336430120b4d617472697865642053321a044d7853322206f412fa9dc3d0280c", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!fa9dc3d0", "long_name": "Matrixed S2", "short_name": "MxS2", "macaddr": "9BL6ncPQ", "hw_model": "LILYGO_TBEAM_S3_CORE", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (40 bytes)

0a09216661396463336430120b4d617472697865642053321a044d7853322206f412fa9dc3d0280c

Hex Analysis:

Size:	40 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 #3120028 Success

Packet Information

Payload Data

Decoded Data: