Packet #3017729

Database ID:	3017729
Mesh Packet ID:	`0x28f7750f` Used for correlation across gateways
Timestamp:	2026-03-19 18:17:24 UTC
From Node:	Meshtastic 039c (039c)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Lonlis-8🇵🇹 (JPE)
Channel:	LongFast
RSSI:	-113 dBm
SNR:	-20.0 dBm
Hop Info:	2/4 hops Start: 4, Limit: 2

Long Name:	Meshtastic 039c
Short Name:	039c
Node ID:	!849a039c
MAC Address:	sIGEmgOc
Hardware:	HELTEC_V3

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:	82 bytes
Gateway:	!6984b6bc
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	2 / 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`	`!6984b6bc` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (82 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2224685980` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`82` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-113.0` dBm Signal strength at gateway	int32
`rx_snr`	`-20.00` dB Signal quality at gateway	float
`rx_time`	`1773944243` 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`	`86` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1773944244.480274` 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 (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!6984b6bc`
Signal Metrics:	RSSI: -113.0 dBm SNR: -20.00 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	82 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!849a039c", "long_name": "Meshtastic 039c", "short_name": "039c", "macaddr": "sIGEmgOc", "hw_model": "HELTEC_V3" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!6984b6bc", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2224685980, "to": 4294967295, "id": 687305999, "rx_time": 1773944243, "rx_snr": -20.0, "rx_rssi": -113, "hop_limit": 2, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 86, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213834396130333963120f4d65736874617374696320303339631a04303339632206b081849a039c282b380142201db8d174988274ae46257801f9bed55246f320315c782e35c7a8a407aaa0d37a4800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!849a039c", "long_name": "Meshtastic 039c", "short_name": "039c", "macaddr": "sIGEmgOc", "hw_model": "HELTEC_V3", "role": "CLIENT_MUTE", "public_key": "HbjRdJiCdK5GJXgB+b7VUkbzIDFceC41x6ikB6qg03o=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (82 bytes)

0a09213834396130333963120f4d65736874617374696320303339631a04303339632206b081849a039c282b380142201db8d174988274ae46257801f9bed55246f320315c782e35c7a8a407aaa0d37a4800

Hex Analysis:

Size:	82 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 #3017729 Success

Packet Information

Payload Data

Decoded Data: