Packet #3546956

Database ID:	3546956
Mesh Packet ID:	`0x61b9b537` Used for correlation across gateways
Timestamp:	2025-07-12 18:54:49 UTC
From Node:	EB1ITJ (ITJ)
To Node:	Lleida-GW-868 🗼🌐 (LLGW)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Lleida-GW-868 🗼🌐 (LLGW)
Channel:	LongFast
RSSI:	-111 dBm
SNR:	-3.0 dBm
Hop Info:	3/7 hops Start: 7, Limit: 4

Long Name:	EB1ITJ
Short Name:	ITJ
Node ID:	!db2a9a98
MAC Address:	EFHbKpqY
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:	72 bytes
Gateway:	!8487e224
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 7

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`	`!8487e224` 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`	`3677002392` Source node ID	uint32
`to`	`2223497764` 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`	`7` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-111.0` dBm Signal strength at gateway	int32
`rx_snr`	`-3.00` dB Signal quality at gateway	float
`rx_time`	`1752346485` 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`	`36` Next hop node ID	uint32
`relay_node`	`224` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752346489.327996` 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:	`!8487e224`
Signal Metrics:	RSSI: -111.0 dBm SNR: -3.00 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": "!db2a9a98", "long_name": "EB1ITJ", "short_name": "ITJ", "macaddr": "EFHbKpqY", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!8487e224", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3677002392, "to": 2223497764, "id": 1639560503, "rx_time": 1752346485, "rx_snr": -3.0, "rx_rssi": -111, "hop_limit": 4, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 36, "relay_node": 224, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216462326139613938120645423149544a1a0349544a22061051db2a9a98282b380142202c6ea173b23fe1e51cf3f80c5fbbecee51ed7200288ebe1ad71c8fd54c570b694800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!db2a9a98", "long_name": "EB1ITJ", "short_name": "ITJ", "macaddr": "EFHbKpqY", "hw_model": "HELTEC_V3", "role": "CLIENT_MUTE", "public_key": "LG6hc7I/4eUc8/gMX7vs7lHtcgAojr4a1xyP1UxXC2k=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (72 bytes)

0a09216462326139613938120645423149544a1a0349544a22061051db2a9a98282b380142202c6ea173b23fe1e51cf3f80c5fbbecee51ed7200288ebe1ad71c8fd54c570b694800

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 #3546956 Success

Packet Information

Payload Data

Decoded Data: