Packet #2636153

Database ID:	2636153
Mesh Packet ID:	`0x18f4ad23` Used for correlation across gateways
Timestamp:	2026-04-04 05:59:51 UTC
From Node:	LondarVR-BG09-Home (8d18)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Vratsa MK 🇧🇬🏚️🛰️ (VRMK)
Channel:	ShortFast
RSSI:	-106 dBm
SNR:	4.75 dBm
Hop Info:	0/2 hops Start: 2, Limit: 2
Relay Node:	`18` VRMM , 8d18 , a018 , 7018 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Long Name:	LondarVR-BG09-Home
Short Name:	8d18
Node ID:	!9e3c8d18
MAC Address:	8J6ePI0Y
Hardware:	HELTEC_VISION_MASTER_T190

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:	85 bytes
Gateway:	!433dec60
Channel:	ShortFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 2

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: ShortFast
+ 2 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!433dec60` Node ID format
`channel_id`	`ShortFast`
`packet`	`MeshPacket` (85 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2654768408` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`85` 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`	`-106.0` dBm Signal strength at gateway	int32
`rx_snr`	`4.75` dB Signal quality at gateway	float
`rx_time`	`1775282390` 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`	`24` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1775282391.6569548` 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)
✓ Custom channel: ShortFast
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!433dec60`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -106.0 dBm SNR: 4.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	85 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!9e3c8d18", "long_name": "LondarVR-BG09-Home", "short_name": "8d18", "macaddr": "8J6ePI0Y", "hw_model": "HELTEC_VISION_MASTER_T190" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433dec60", "channel_id": "ShortFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2654768408, "to": 4294967295, "id": 418688291, "rx_time": 1775282390, "rx_snr": 4.75, "rx_rssi": -106, "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": 24, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921396533633864313812124c6f6e64617256522d424730392d486f6d651a04386431382206f09e9e3c8d182842380c4220984bc1c8d6b3e2ce3065867eb3ed0972c506a382a65b61c8451ab8ff7f33bb044800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!9e3c8d18", "long_name": "LondarVR-BG09-Home", "short_name": "8d18", "macaddr": "8J6ePI0Y", "hw_model": "HELTEC_VISION_MASTER_T190", "role": "CLIENT_BASE", "public_key": "mEvByNaz4s4wZYZ+s+0JcsUGo4KmW2HIRRq4/38zuwQ=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (85 bytes)

0a0921396533633864313812124c6f6e64617256522d424730392d486f6d651a04386431382206f09e9e3c8d182842380c4220984bc1c8d6b3e2ce3065867eb3ed0972c506a382a65b61c8451ab8ff7f33bb044800

Hex Analysis:

Size:	85 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 #2636153 Success

Packet Information

Payload Data

Decoded Data: