Packet #2715288

Database ID:	2715288
Mesh Packet ID:	`0xa6959f24` Used for correlation across gateways
Timestamp:	2025-08-16 18:20:51 UTC
From Node:	PD2DMA (DMA)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Matrixed H3 (MtxH)
Channel:	LongFast
RSSI:	-127 dBm
SNR:	-17.0 dBm
Hop Info:	5/5 hops Start: 5, Limit: 0

Long Name:	PD2DMA
Short Name:	DMA
Node ID:	!ae1b1d91
MAC Address:	6VGuGx2R
Hardware:	HELTEC_MESH_POCKET

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:	70 bytes
Gateway:	!da544e28
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	5 / 5

Privacy Summary

Exposure Level:
Broadcast

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

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!da544e28` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (70 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2921012625` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`70` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`5` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-127.0` dBm Signal strength at gateway	int32
`rx_snr`	`-17.00` dB Signal quality at gateway	float
`rx_time`	`1751066137` 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`	`1755361251.2732382` 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

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (5 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!da544e28`
Signal Metrics:	RSSI: -127.0 dBm SNR: -17.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	70 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!ae1b1d91", "long_name": "PD2DMA", "short_name": "DMA", "macaddr": "6VGuGx2R", "hw_model": "HELTEC_MESH_POCKET" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!da544e28", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2921012625, "to": 4294967295, "id": 2794823460, "rx_time": 1751066137, "rx_snr": -17.0, "rx_rssi": -127, "hop_limit": 0, "hop_start": 5, "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": "0a092161653162316439311206504432444d411a03444d412206e951ae1b1d91285e4220272ad8e323d83fd499d68059eb0b3f7df9aa49daa463d34dd2f401cd2a079e264800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!ae1b1d91", "long_name": "PD2DMA", "short_name": "DMA", "macaddr": "6VGuGx2R", "hw_model": "HELTEC_MESH_POCKET", "public_key": "JyrY4yPYP9SZ1oBZ6ws/ffmqSdqkY9NN0vQBzSoHniY=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (70 bytes)

0a092161653162316439311206504432444d411a03444d412206e951ae1b1d91285e4220272ad8e323d83fd499d68059eb0b3f7df9aa49daa463d34dd2f401cd2a079e264800

Hex Analysis:

Size:	70 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 #2715288 Success

Packet Information

Payload Data

Decoded Data: