Packet #2821925

Database ID:	2821925
Mesh Packet ID:	`0x45eefeca` Used for correlation across gateways
Timestamp:	2025-11-27 22:43:24 UTC
From Node:	K2XAP deck (XAPk)
To Node:	!00000001 (0001)
Success:	Processed
Protocol:	NEIGHBORINFO_APP Port: 71

Gateway:	K2XAP deck (XAPk)
Channel:	MediumSlow
RSSI:	Unknown
SNR:	Unknown
Hop Info:	0/4 hops Start: 4, Limit: 4
Relay Node:	`38` XAPk Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Reporting Node:	K2XAP deck (XAPk)
Last Sent By:	K2XAP deck (XAPk)
Broadcast Interval:	21600 seconds
Neighbors Found:	4

Neighbor Node	SNR	Last Heard	Broadcast Interval	Signal Quality
K2XAP V4 MS (XAP4)	8.0 dB	Unknown	Unknown	Excellent
K2XAP R1 ext (3ba0)	8.2 dB	Unknown	Unknown	Excellent
K2XAP R1int MS (XAPM)	7.5 dB	Unknown	Unknown	Excellent
K2XAP neo (XAPn)	8.5 dB	Unknown	Unknown	Excellent

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:	!432fc238
Channel:	MediumSlow
Payload Type:	NEIGHBORINFO_APP
Hop Count:	Unknown / 4

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 3 more...

Exposure Risks:
⚠ Packet visible to MQTT subscribers

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!432fc238` Node ID format
`channel_id`	`MediumSlow`
`packet`	`MeshPacket` (68 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1127203384` Source node ID	uint32
`to`	`1` Target node ID	uint32
`decoded.portnum`	`71` NEIGHBORINFO_APP	enum
`decoded.payload_length`	`68` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	Not set	float
`rx_time`	`1764283513` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	`10` Packet priority level	enum
`delayed`	Not set	enum
`channel`	Not set	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`56` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1764283404.099595` 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
✓ Custom channel: MediumSlow
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Packet visible to MQTT subscribers

MQTT-Specific Fields

Gateway ID:	`!432fc238`
Zero Hop Policy:	Enabled Direct gateway connection

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NEIGHBORINFO_APP
Size:	68 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "node_id": 1127203384, "last_sent_by_id": 1127203384, "node_broadcast_interval_secs": 21600, "neighbors": [ { "node_id": 2996806560, "snr": 8.0, "last_rx_time": null, "node_broadcast_interval_secs": null, "last_rx_time_str": "Unknown", "node_name": "K2XAP V4 MS (XAP4)" }, { "node_id": 2972990368, "snr": 8.25, "last_rx_time": null, "node_broadcast_interval_secs": null, "last_rx_time_str": "Unknown", "node_name": "K2XAP R1 ext (3ba0)" }, { "node_id": 1103350811, "snr": 7.5, "last_rx_time": null, "node_broadcast_interval_secs": null, "last_rx_time_str": "Unknown", "node_name": "K2XAP R1int MS (XAPM)" }, { "node_id": 1495597667, "snr": 8.5, "last_rx_time": null, "node_broadcast_interval_secs": null, "last_rx_time_str": "Unknown", "node_name": "K2XAP neo (XAPn)" } ], "neighbor_count": 4, "node_name": "K2XAP deck (XAPk)", "last_sent_by_name": "K2XAP deck (XAPk)" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!432fc238", "channel_id": "MediumSlow", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1127203384, "to": 1, "id": 1173290698, "rx_time": 1764283513, "rx_snr": 0.0, "rx_rssi": 0, "hop_limit": 4, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 10, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 56, "tx_after": 0, "decoded": { "portnum": 71, "payload": "08b884bf990410b884bf990418e0a801220b08a0c7fe940b1500000041220b08a0f7d0890b1500000441220b089b988f8e04150000f040220b08e38494c9051500000841", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "node_id": 1127203384, "last_sent_by_id": 1127203384, "node_broadcast_interval_secs": 21600, "neighbors": [ { "node_id": 2996806560, "snr": 8.0 }, { "node_id": 2972990368, "snr": 8.25 }, { "node_id": 1103350811, "snr": 7.5 }, { "node_id": 1495597667, "snr": 8.5 } ], "type": "protobuf", "portnum": "NEIGHBORINFO_APP", "message_class": "NeighborInfo" } } } }

Raw Packet Data (68 bytes)

08b884bf990410b884bf990418e0a801220b08a0c7fe940b1500000041220b08a0f7d0890b1500000441220b089b988f8e04150000f040220b08e38494c9051500000841

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 #2821925 Success

Packet Information

Payload Data

Decoded Data:

Neighbor Information Report

4

Neighbor Details