Packet #20183

Database ID:	20183
Mesh Packet ID:	`0x20c524af` Used for correlation across gateways
Timestamp:	2026-04-02 12:53:13 UTC
From Node:	Mountain Router 1 (MR1)
To Node:	!1fa05abc (5abc)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	wi3w-base (w00b)
Channel:	LongFast
RSSI:	-109 dBm
SNR:	-16.5 dBm
Hop Info:	-3/0 hops Start: 0, Limit: 3

Long Name:	Mountain Router 1
Short Name:	MR1
Node ID:	!c98cbdf2
MAC Address:	x8PJjL3y
Hardware:	RAK4631

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:	47 bytes
Gateway:	!24da43f9
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	-3 / Unknown

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`	`!24da43f9` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (47 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3381444082` Source node ID	uint32
`to`	`530602684` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`47` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	Not set	uint32
`hops_taken`	`-3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-109.0` dBm Signal strength at gateway	int32
`rx_snr`	`-16.50` dB Signal quality at gateway	float
`rx_time`	`1775134393` 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`	`1775134393.7574449` 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:	`!24da43f9`
Signal Metrics:	RSSI: -109.0 dBm SNR: -16.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	47 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!c98cbdf2", "long_name": "Mountain Router 1", "short_name": "MR1", "macaddr": "x8PJjL3y", "hw_model": "RAK4631" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!24da43f9", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3381444082, "to": 530602684, "id": 549790895, "rx_time": 1775134393, "rx_snr": -16.5, "rx_rssi": -109, "hop_limit": 3, "hop_start": 0, "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": "0a0921633938636264663212114d6f756e7461696e20526f7574657220311a034d52312206c7c3c98cbdf228093803", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!c98cbdf2", "long_name": "Mountain Router 1", "short_name": "MR1", "macaddr": "x8PJjL3y", "hw_model": "RAK4631", "role": "ROUTER_CLIENT", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (47 bytes)

0a0921633938636264663212114d6f756e7461696e20526f7574657220311a034d52312206c7c3c98cbdf228093803

Hex Analysis:

Size:	47 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 #20183 Success

Packet Information

Payload Data

Decoded Data: