Packet #381964

Database ID:	381964
Mesh Packet ID:	`0x4a36b9dd` Used for correlation across gateways
Timestamp:	2026-01-17 13:05:34 UTC
From Node:	UN7GRA 433 MHz (GRA4)
To Node:	!9e9e2720 (2720)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Socrates433 (3c12)
Channel:	LongFast
RSSI:	-96 dBm
SNR:	3.0 dBm
Hop Info:	2/3 hops Start: 3, Limit: 1

Long Name:	UN7GRA 433 MHz
Short Name:	GRA4
Node ID:	!db586de0
MAC Address:	EFHbWG3g
Hardware:	HELTEC_WIRELESS_TRACKER

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:	79 bytes
Gateway:	!b7603c12
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 3

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`	`!b7603c12` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (79 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3680005600` Source node ID	uint32
`to`	`2661164832` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`79` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-96.0` dBm Signal strength at gateway	int32
`rx_snr`	`3.00` dB Signal quality at gateway	float
`rx_time`	`1768637124` 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`	`176` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1768637134.443415` 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 (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!b7603c12`
Signal Metrics:	RSSI: -96.0 dBm SNR: 3.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	79 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!db586de0", "long_name": "UN7GRA 433 MHz", "short_name": "GRA4", "macaddr": "EFHbWG3g", "hw_model": "HELTEC_WIRELESS_TRACKER" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!b7603c12", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3680005600, "to": 2661164832, "id": 1245100509, "rx_time": 1768637124, "rx_snr": 3.0, "rx_rssi": -96, "hop_limit": 1, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 176, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216462353836646530120e554e3747524120343333204d487a1a044752413422061051db586de0283042207c42b0085bfe99c08a32243dda2ee79fd9b7b7c09f96e46f9a3cee03681cbb7f4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!db586de0", "long_name": "UN7GRA 433 MHz", "short_name": "GRA4", "macaddr": "EFHbWG3g", "hw_model": "HELTEC_WIRELESS_TRACKER", "public_key": "fEKwCFv+mcCKMiQ92i7nn9m3t8CfluRvmjzuA2gcu38=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (79 bytes)

0a09216462353836646530120e554e3747524120343333204d487a1a044752413422061051db586de0283042207c42b0085bfe99c08a32243dda2ee79fd9b7b7c09f96e46f9a3cee03681cbb7f4800

Hex Analysis:

Size:	79 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 #381964 Success

Packet Information

Payload Data

Decoded Data: