Packet #4118976

Database ID:	4118976
Mesh Packet ID:	`0xd4896690` Used for correlation across gateways
Timestamp:	2025-07-19 09:00:07 UTC
From Node:	EA7LJD BASE📱🧸 (LJD2)
To Node:	!7a6be7f8 (e7f8)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	KEL1 (59b0)
Channel:	LongFast
RSSI:	-115 dBm
SNR:	-3.5 dBm
Hop Info:	3/3 hops Start: 3, Limit: 0

Long Name:	EA7LJD BASE📱🧸
Short Name:	LJD2
Node ID:	!97004010
MAC Address:	zLqXAEAQ
Hardware:	T_DECK

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:	84 bytes
Gateway:	!433d59b0
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 3

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 1 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 2 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!433d59b0` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (84 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2533376016` Source node ID	uint32
`to`	`2053892088` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`84` bytes	size
`hop_limit`	Not set	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-115.0` dBm Signal strength at gateway	int32
`rx_snr`	`-3.50` dB Signal quality at gateway	float
`rx_time`	`1752915589` 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`	`1752915607.7500534` 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
✓ Gateway node ID tracked

Exposure Risks:

⚠ 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:	`!433d59b0`
Signal Metrics:	RSSI: -115.0 dBm SNR: -3.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	84 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!97004010", "long_name": "EA7LJD BASE📱🧸", "short_name": "LJD2", "macaddr": "zLqXAEAQ", "hw_model": "T_DECK" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!433d59b0", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2533376016, "to": 2053892088, "id": 3565774480, "rx_time": 1752915589, "rx_snr": -3.5, "rx_rssi": -115, "hop_limit": 0, "hop_start": 3, "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": "0a0921393730303430313012134541374c4a442042415345f09f93b1f09fa7b81a044c4a44322206ccba970040102832380142206aa43c8ed377418ea1ca371cd19a7a411ee3c75f1d21461353c13937f9988513", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!97004010", "long_name": "EA7LJD BASE📱🧸", "short_name": "LJD2", "macaddr": "zLqXAEAQ", "hw_model": "T_DECK", "role": "CLIENT_MUTE", "public_key": "aqQ8jtN3QY6hyjcc0Zp6QR7jx18dIUYTU8E5N/mYhRM=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (84 bytes)

0a0921393730303430313012134541374c4a442042415345f09f93b1f09fa7b81a044c4a44322206ccba970040102832380142206aa43c8ed377418ea1ca371cd19a7a411ee3c75f1d21461353c13937f9988513

Hex Analysis:

Size:	84 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 #4118976 Success

Packet Information

Payload Data

Decoded Data: