Packet #3998762

Database ID:	3998762
Mesh Packet ID:	`0x69f984c0` Used for correlation across gateways
Timestamp:	2025-07-17 21:01:45 UTC
From Node:	Edu 96f2 (96f2)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	[TLGO] Base 📡🌐 (TLG0)
Channel:	LongFast
RSSI:	-111 dBm
SNR:	-4.5 dBm
Hop Info:	3/4 hops Start: 4, Limit: 1

Long Name:	Edu 96f2
Short Name:	96f2
Node ID:	!31e896f2
MAC Address:	yy0x6Jby
Hardware:	TRACKER_T1000_E

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:	71 bytes
Gateway:	!da638a24
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 4

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`	`!da638a24` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (71 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`837326578` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`71` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-111.0` dBm Signal strength at gateway	int32
`rx_snr`	`-4.50` dB Signal quality at gateway	float
`rx_time`	`1752786103` 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`	`1752786105.0678253` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!da638a24`
Signal Metrics:	RSSI: -111.0 dBm SNR: -4.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	71 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!31e896f2", "long_name": "Edu 96f2", "short_name": "96f2", "macaddr": "yy0x6Jby", "hw_model": "TRACKER_T1000_E" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!da638a24", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 837326578, "to": 4294967295, "id": 1777960128, "rx_time": 1752786103, "rx_snr": -4.5, "rx_rssi": -111, "hop_limit": 1, "hop_start": 4, "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": "0a09213331653839366632120845647520393666321a04393666322206cb2d31e896f2284742202b321b4b6b51aa96857b8e6ed776c2580f6251bdc93dbda95d2e99e291458725", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!31e896f2", "long_name": "Edu 96f2", "short_name": "96f2", "macaddr": "yy0x6Jby", "hw_model": "TRACKER_T1000_E", "public_key": "KzIbS2tRqpaFe45u13bCWA9iUb3JPb2pXS6Z4pFFhyU=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (71 bytes)

0a09213331653839366632120845647520393666321a04393666322206cb2d31e896f2284742202b321b4b6b51aa96857b8e6ed776c2580f6251bdc93dbda95d2e99e291458725

Hex Analysis:

Size:	71 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 #3998762 Success

Packet Information

Payload Data

Decoded Data: