Packet #2499112

Database ID:	2499112
Mesh Packet ID:	`0x0b2b4cf7` Used for correlation across gateways
Timestamp:	2025-08-15 04:17:31 UTC
From Node:	Zutphen Node 1 PD4JV - No & Ignore MQTT (ZN1)
To Node:	!6c7411c0 (11c0)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	GOC-Parkstad.nl (GOC)
Channel:	LongFast
RSSI:	-127 dBm
SNR:	-18.0 dBm
Hop Info:	3/4 hops Start: 4, Limit: 1

Long Name:	Zutphen Node 1 PD4JV - No & Ignore MQTT
Short Name:	ZN1
Node ID:	!3366633c
MAC Address:	ZOgzZmM8
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:	101 bytes
Gateway:	!4357860c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 4

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`	`!4357860c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (101 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`862348092` Source node ID	uint32
`to`	`1819546048` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`101` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-127.0` dBm Signal strength at gateway	int32
`rx_snr`	`-18.00` dB Signal quality at gateway	float
`rx_time`	`1755224250` 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`	`1755224251.6556683` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!4357860c`
Signal Metrics:	RSSI: -127.0 dBm SNR: -18.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	101 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!3366633c", "long_name": "Zutphen Node 1 PD4JV - No & Ignore MQTT", "short_name": "ZN1", "macaddr": "ZOgzZmM8", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!4357860c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 862348092, "to": 1819546048, "id": 187387127, "rx_time": 1755224250, "rx_snr": -18.0, "rx_rssi": -127, "hop_limit": 1, "hop_start": 4, "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": "0a0921333336363633336312275a75747068656e204e6f64652031205044344a56202d204e6f20262049676e6f7265204d5154541a035a4e31220664e83366633c282b4220479b75c8f8a5c3efb31ff41dae86057d758bf5be3a4c343dcbf2a805022cbc78", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!3366633c", "long_name": "Zutphen Node 1 PD4JV - No & Ignore MQTT", "short_name": "ZN1", "macaddr": "ZOgzZmM8", "hw_model": "HELTEC_V3", "public_key": "R5t1yPilw++zH/QdroYFfXWL9b46TDQ9y/KoBQIsvHg=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (101 bytes)

0a0921333336363633336312275a75747068656e204e6f64652031205044344a56202d204e6f20262049676e6f7265204d5154541a035a4e31220664e83366633c282b4220479b75c8f8a5c3efb31ff41dae86057d758bf5be3a4c343dcbf2a805022cbc78

Hex Analysis:

Size:	101 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 #2499112 Success

Packet Information

Payload Data

Decoded Data: