Packet #3975165

Database ID:	3975165
Mesh Packet ID:	`0x39514bcb` Used for correlation across gateways
Timestamp:	2025-07-17 15:00:19 UTC
From Node:	EAL Station 2 🌟 (🌟)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	EAL Station 1 🗼🌐 (🗼)
Channel:	LongFast
RSSI:	-114 dBm
SNR:	-4.75 dBm
Hop Info:	0/6 hops Start: 6, Limit: 6

Long Name:	EAL Station 2 🌟
Short Name:	🌟
Node ID:	!6f14b147
MAC Address:	y5hvFLFH
Hardware:	NRF52_PROMICRO_DIY

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:	81 bytes
Gateway:	!7c5ac2c4
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 6

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!7c5ac2c4` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (81 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1863627079` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`81` bytes	size
`hop_limit`	`6` Remaining hops allowed	uint32
`hop_start`	`6` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-114.0` dBm Signal strength at gateway	int32
`rx_snr`	`-4.75` dB Signal quality at gateway	float
`rx_time`	`1752761620` 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`	`71` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752764419.0473492` Unix timestamp	uint32

MQTT Privacy & Exposure Analysis

Analysis of privacy features and exposure risks when packet is shared via MQTT

Exposure Level: Broadcast

Privacy Features:

✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!7c5ac2c4`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -114.0 dBm SNR: -4.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	81 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!6f14b147", "long_name": "EAL Station 2 🌟", "short_name": "🌟", "macaddr": "y5hvFLFH", "hw_model": "NRF52_PROMICRO_DIY" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!7c5ac2c4", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1863627079, "to": 4294967295, "id": 961629131, "rx_time": 1752761620, "rx_snr": -4.75, "rx_rssi": -114, "hop_limit": 6, "hop_start": 6, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 71, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213666313462313437121245414c2053746174696f6e203220f09f8c9f1a04f09f8c9f2206cb986f14b147283f422089118fa2996a866d22142a139bc57c6087bc78bd89bdb29bbbe7d0092eb89e35", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!6f14b147", "long_name": "EAL Station 2 🌟", "short_name": "🌟", "macaddr": "y5hvFLFH", "hw_model": "NRF52_PROMICRO_DIY", "public_key": "iRGPoplqhm0iFCoTm8V8YIe8eL2JvbKbu+fQCS64njU=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (81 bytes)

0a09213666313462313437121245414c2053746174696f6e203220f09f8c9f1a04f09f8c9f2206cb986f14b147283f422089118fa2996a866d22142a139bc57c6087bc78bd89bdb29bbbe7d0092eb89e35

Hex Analysis:

Size:	81 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 #3975165 Success

Packet Information

Payload Data

Decoded Data: