Packet #21400503

Database ID:	21400503
Mesh Packet ID:	`0x0421fc1b` Used for correlation across gateways
Timestamp:	2026-08-31 20:49:15 UTC
From Node:	Meshtastic b52e (b52e)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Medved GW8 (MED8)
Channel:	MediumFast
RSSI:	-100 dBm
SNR:	4.0 dBm
Hop Info:	4/7 hops Start: 7, Limit: 3

Long Name:	Meshtastic b52e
Short Name:	b52e
Node ID:	!fa26b52e
MAC Address:	8Kr6JrUu
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:	80 bytes
Gateway:	!fa68e0c0
Channel:	MediumFast
Payload Type:	NODEINFO_APP
Hop Count:	4 / 7

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: MediumFast
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!fa68e0c0` Node ID format
`channel_id`	`MediumFast`
`packet`	`MeshPacket` (80 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`4196840750` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`80` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`4` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-100.0` dBm Signal strength at gateway	int32
`rx_snr`	`4.00` dB Signal quality at gateway	float
`rx_time`	`1788198511` 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`	`76` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1788198555.7060838` 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: MediumFast
✓ Gateway node ID tracked

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (4 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!fa68e0c0`
Signal Metrics:	RSSI: -100.0 dBm SNR: 4.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	80 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!fa26b52e", "long_name": "Meshtastic b52e", "short_name": "b52e", "macaddr": "8Kr6JrUu", "hw_model": "HELTEC_MESH_POCKET" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!fa68e0c0", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 4196840750, "to": 4294967295, "id": 69336091, "rx_time": 1788198511, "rx_snr": 4.0, "rx_rssi": -100, "hop_limit": 3, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 76, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216661323662353265120f4d65736874617374696320623532651a04623532652206f0aafa26b52e285e4220a3a7fbbc67589c225b4b7634bd8f539a6543aa4ff35ccc7aa9825e08a35c8a0c4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!fa26b52e", "long_name": "Meshtastic b52e", "short_name": "b52e", "macaddr": "8Kr6JrUu", "hw_model": "HELTEC_MESH_POCKET", "public_key": "o6f7vGdYnCJbS3Y0vY9TmmVDqk/zXMx6qYJeCKNcigw=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (80 bytes)

0a09216661323662353265120f4d65736874617374696320623532651a04623532652206f0aafa26b52e285e4220a3a7fbbc67589c225b4b7634bd8f539a6543aa4ff35ccc7aa9825e08a35c8a0c4800

Hex Analysis:

Size:	80 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 #21400503 Success

Packet Information

Payload Data

Decoded Data: