Packet #1322853

Database ID:	1322853
Mesh Packet ID:	`0xa5b0fb4b` Used for correlation across gateways
Timestamp:	2025-06-20 12:10:42 UTC
From Node:	Kiao 35d5 (35d5)
To Node:	Meshtastic 507c (507c)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Meshtastic 507c (507c)
Channel:	LongFast
RSSI:	-104 dBm
SNR:	-2.25 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4

Long Name:	Kiao 35d5
Short Name:	35d5
Node ID:	!182835d5
MAC Address:	3kkYKDXV
Hardware:	XIAO_NRF52_KIT

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:	72 bytes
Gateway:	!849a507c
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`	`!849a507c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (72 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`405288405` Source node ID	uint32
`to`	`2224705660` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`72` 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`	`-104.0` dBm Signal strength at gateway	int32
`rx_snr`	`-2.25` dB Signal quality at gateway	float
`rx_time`	`1750420923` 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`	`83` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1750421442.733865` 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:	`!849a507c`
Signal Metrics:	RSSI: -104.0 dBm SNR: -2.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	72 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!182835d5", "long_name": "Kiao 35d5", "short_name": "35d5", "macaddr": "3kkYKDXV", "hw_model": "XIAO_NRF52_KIT" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!849a507c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 405288405, "to": 2224705660, "id": 2779839307, "rx_time": 1750420923, "rx_snr": -2.25, "rx_rssi": -104, "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": 83, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921313832383335643512094b69616f20333564351a04333564352206de49182835d5285842207401757d1c233762e88cd1bf4fb5509a1904d0a2cee7904b8e6806c26b61a537", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!182835d5", "long_name": "Kiao 35d5", "short_name": "35d5", "macaddr": "3kkYKDXV", "hw_model": "XIAO_NRF52_KIT", "public_key": "dAF1fRwjN2LojNG/T7VQmhkE0KLO55BLjmgGwmthpTc=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (72 bytes)

0a0921313832383335643512094b69616f20333564351a04333564352206de49182835d5285842207401757d1c233762e88cd1bf4fb5509a1904d0a2cee7904b8e6806c26b61a537

Hex Analysis:

Size:	72 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 #1322853 Success

Packet Information

Payload Data

Decoded Data: