Packet #19970812

Database ID:	19970812
Mesh Packet ID:	`0x8e8a682b` Used for correlation across gateways
Timestamp:	2026-07-27 19:17:19 UTC
From Node:	Unlis (KEV)
To Node:	Meshtastic 5ae4 (5ae4)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Medved GW8 (MED8)
Channel:	MediumFast
RSSI:	-116 dBm
SNR:	-9.5 dBm
Hop Info:	0/2 hops Start: 2, Limit: 2

Long Name:	Unlis
Short Name:	KEV
Node ID:	!73289e04
MAC Address:	/j1zKJ4E
Hardware:	NRF52_PROMICRO_DIY

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:	69 bytes
Gateway:	!fa68e0c0
Channel:	MediumFast
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`	`!fa68e0c0` Node ID format
`channel_id`	`MediumFast`
`packet`	`MeshPacket` (69 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1932041732` Source node ID	uint32
`to`	`1770347236` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`69` 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`	`-116.0` dBm Signal strength at gateway	int32
`rx_snr`	`-9.50` dB Signal quality at gateway	float
`rx_time`	`1785169031` 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`	`4` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1785169039.2210264` 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: MediumFast
✓ 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:	`!fa68e0c0`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -116.0 dBm SNR: -9.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	69 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!73289e04", "long_name": "Unlis", "short_name": "KEV", "macaddr": "/j1zKJ4E", "hw_model": "NRF52_PROMICRO_DIY" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!fa68e0c0", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1932041732, "to": 1770347236, "id": 2391435307, "rx_time": 1785169031, "rx_snr": -9.5, "rx_rssi": -116, "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": 4, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a092137333238396530341205556e6c69731a034b45562206fe3d73289e04283f42206798726a02b7e5fa98a6bb983fd5e164787bd53f1b53a9a989377b255fbc42784800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!73289e04", "long_name": "Unlis", "short_name": "KEV", "macaddr": "/j1zKJ4E", "hw_model": "NRF52_PROMICRO_DIY", "public_key": "Z5hyagK35fqYpruYP9XhZHh71T8bU6mpiTd7JV+8Qng=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (69 bytes)

0a092137333238396530341205556e6c69731a034b45562206fe3d73289e04283f42206798726a02b7e5fa98a6bb983fd5e164787bd53f1b53a9a989377b255fbc42784800

Hex Analysis:

Size:	69 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 #19970812 Success

Packet Information

Payload Data

Decoded Data: