Packet #3980677

Database ID:	3980677
Mesh Packet ID:	`0x3ea1abc0` Used for correlation across gateways
Timestamp:	2025-07-17 16:23:52 UTC
From Node:	CMG-CL-15f0 (15f0)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	CMG-CL-1724 (1724)
Channel:	LongFast
RSSI:	-46 dBm
SNR:	6.75 dBm
Hop Info:	1/5 hops Start: 5, Limit: 4

Long Name:	CMG-CL-15f0
Short Name:	15f0
Node ID:	!a0cb15f0
MAC Address:	MO2gyxXw
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:	76 bytes
Gateway:	!db2f1724
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 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`	`!db2f1724` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (76 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2697663984` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`76` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-46.0` dBm Signal strength at gateway	int32
`rx_snr`	`6.75` dB Signal quality at gateway	float
`rx_time`	`1752768922` 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`	`28` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752769432.4401097` 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 (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!db2f1724`
Signal Metrics:	RSSI: -46.0 dBm SNR: 6.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	76 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!a0cb15f0", "long_name": "CMG-CL-15f0", "short_name": "15f0", "macaddr": "MO2gyxXw", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!db2f1724", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2697663984, "to": 4294967295, "id": 1050782656, "rx_time": 1752768922, "rx_snr": 6.75, "rx_rssi": -46, "hop_limit": 4, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 28, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216130636231356630120b434d472d434c2d313566301a0431356630220630eda0cb15f0282b42203b89b19b41189c5abd36cb117c390e262f4162bdee213ba7dbc6719a89b3d04a4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!a0cb15f0", "long_name": "CMG-CL-15f0", "short_name": "15f0", "macaddr": "MO2gyxXw", "hw_model": "HELTEC_V3", "public_key": "O4mxm0EYnFq9NssRfDkOJi9BYr3uITun28Zxmomz0Eo=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (76 bytes)

0a09216130636231356630120b434d472d434c2d313566301a0431356630220630eda0cb15f0282b42203b89b19b41189c5abd36cb117c390e262f4162bdee213ba7dbc6719a89b3d04a4800

Hex Analysis:

Size:	76 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 #3980677 Success

Packet Information

Payload Data

Decoded Data: