Packet #783169

Database ID:	783169
Mesh Packet ID:	`0x5acd919b` Used for correlation across gateways
Timestamp:	2026-04-11 15:45:42 UTC
From Node:	FabLab Lübeck (FLHL)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	FabLab Lübeck (FLHL)
Channel:	LongFast
RSSI:	Unknown
SNR:	Unknown
Hop Info:	0/5 hops Start: 5, Limit: 5
Relay Node:	`34` FLHL Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Long Name:	FabLab Lübeck
Short Name:	FLHL
Node ID:	!69828534
MAC Address:	kHBpgoU0
Hardware:	HELTEC_V4

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:	79 bytes
Gateway:	!69828534
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	0 / 5

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 1 more...

MQTT ServiceEnvelope Fields

Field	Value
`gateway_id`	`!69828534` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (79 bytes) Contains the actual mesh network packet

MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

Field	Value	Type
`from`	`1770161460` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`NODEINFO_APP` NODEINFO_APP	enum
`decoded.payload_length`	`79` bytes	size
`hop_limit`	`5` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	Not set	float
`rx_time`	`1775922341` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	`BACKGROUND` Packet priority level	enum
`delayed`	Not set	enum
`channel`	`8` Channel index	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`52` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	Not set	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
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers

MQTT-Specific Fields

Gateway ID:	`!69828534`
Zero Hop Policy:	Enabled Direct gateway connection

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	79 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!69828534", "long_name": "FabLab Lübeck", "short_name": "FLHL", "macaddr": "kHBpgoU0", "hw_model": "HELTEC_V4" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "packet": { "from": 1770161460, "to": 4294967295, "channel": 8, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNjk4Mjg1MzQSDkZhYkxhYiBMw7xiZWNrGgRGTEhMIgaQcGmChTQobkIgnEsF+NSELNYnH5NYg2n7yoOqIm+OWHMyRAVBgDoH7X1IAA==", "bitfield": 1 }, "id": 1523421595, "rx_time": 1775922341, "hop_limit": 5, "priority": "BACKGROUND", "hop_start": 5, "relay_node": 52 }, "channel_id": "LongFast", "gateway_id": "!69828534" }, "mesh_packet": { "from": 1770161460, "to": 4294967295, "channel": 8, "decoded": { "portnum": "NODEINFO_APP", "payload": "CgkhNjk4Mjg1MzQSDkZhYkxhYiBMw7xiZWNrGgRGTEhMIgaQcGmChTQobkIgnEsF+NSELNYnH5NYg2n7yoOqIm+OWHMyRAVBgDoH7X1IAA==", "bitfield": 1, "parsed_payload": { "id": "!69828534", "long_name": "FabLab Lübeck", "short_name": "FLHL", "macaddr": "kHBpgoU0", "hw_model": "HELTEC_V4", "public_key": "nEsF+NSELNYnH5NYg2n7yoOqIm+OWHMyRAVBgDoH7X0=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } }, "id": 1523421595, "rx_time": 1775922341, "hop_limit": 5, "priority": "BACKGROUND", "hop_start": 5, "relay_node": 52 } }

Raw Packet Data (79 bytes)

0a09213639383238353334120e4661624c6162204cc3bc6265636b1a04464c484c2206907069828534286e42209c4b05f8d4842cd6271f93588369fbca83aa226f8e587332440541803a07ed7d4800

Hex Analysis:

Size:	79 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 #783169 Success

Packet Information

Payload Data

Decoded Data: