Packet #157042

Database ID:	157042
Mesh Packet ID:	`0xe55515f1` Used for correlation across gateways
Timestamp:	2025-09-07 10:47:39 UTC
From Node:	mesh gordon (mesh)
To Node:	banderas (bras)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	m-base-b (mb-b)
Channel:	Bulgaria
RSSI:	-38 dBm
SNR:	10.5 dBm
Hop Info:	0/2 hops Start: 2, Limit: 2

Long Name:	mesh gordon
Short Name:	mesh
Node ID:	!27ca47d0
MAC Address:	PIQnykfQ
Hardware:	T_DECK

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:	!a20afe30
Channel:	Bulgaria
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 2

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 3 more...

Exposure Risks:
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!a20afe30` Node ID format
`channel_id`	`Bulgaria`
`packet`	`MeshPacket` (76 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`667568080` Source node ID	uint32
`to`	`2882367503` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`76` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`2` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-38.0` dBm Signal strength at gateway	int32
`rx_snr`	`10.50` dB Signal quality at gateway	float
`rx_time`	`1757231258` 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`	`208` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1757231259.5710962` 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
✓ Custom channel: Bulgaria
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!a20afe30`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -38.0 dBm SNR: 10.50 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": "!27ca47d0", "long_name": "mesh gordon", "short_name": "mesh", "macaddr": "PIQnykfQ", "hw_model": "T_DECK" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!a20afe30", "channel_id": "Bulgaria", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 667568080, "to": 2882367503, "id": 3847558641, "rx_time": 1757231258, "rx_snr": 10.5, "rx_rssi": -38, "hop_limit": 2, "hop_start": 2, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 208, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213237636134376430120b6d65736820676f72646f6e1a046d65736822063c8427ca47d0283238014220f462ece2a3736f10a6ff9499868fac4b2c2ea7f547720a81b42d69b5d1072545", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!27ca47d0", "long_name": "mesh gordon", "short_name": "mesh", "macaddr": "PIQnykfQ", "hw_model": "T_DECK", "role": "CLIENT_MUTE", "public_key": "9GLs4qNzbxCm/5SZho+sSywup/VHcgqBtC1ptdEHJUU=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (76 bytes)

0a09213237636134376430120b6d65736820676f72646f6e1a046d65736822063c8427ca47d0283238014220f462ece2a3736f10a6ff9499868fac4b2c2ea7f547720a81b42d69b5d1072545

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 #157042 Success

Packet Information

Payload Data

Decoded Data: