Packet #25782314

Database ID:	25782314
Mesh Packet ID:	`0x8864a753` Used for correlation across gateways
Timestamp:	2025-12-05 09:56:21 UTC
From Node:	J_s1 (8126)
To Node:	ea2ath-4 (ath4)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	LUNATIC (LNTC)
Channel:	LongFast
RSSI:	-79 dBm
SNR:	7.0 dBm
Hop Info:	1/4 hops Start: 4, Limit: 3
Relay Node:	`20` SNT3 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Long Name:	J_s1
Short Name:	J_s1
Node ID:	!4b368126
MAC Address:	w8dLNoEm
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:	71 bytes
Gateway:	!b2a7e4ec
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 4

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`	`!b2a7e4ec` 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`	`1261863206` Source node ID	uint32
`to`	`3759190260` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`71` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`4` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-79.0` dBm Signal strength at gateway	int32
`rx_snr`	`7.00` dB Signal quality at gateway	float
`rx_time`	`1764928580` 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`	`32` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1764928581.4282365` 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 (1 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!b2a7e4ec`
Signal Metrics:	RSSI: -79.0 dBm SNR: 7.00 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": "!4b368126", "long_name": "J_s1", "short_name": "J_s1", "macaddr": "w8dLNoEm", "hw_model": "NRF52_PROMICRO_DIY" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!b2a7e4ec", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1261863206, "to": 3759190260, "id": 2288297811, "rx_time": 1764928580, "rx_snr": 7.0, "rx_rssi": -79, "hop_limit": 3, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 32, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921346233363831323612044a5f73311a044a5f73312206c3c74b368126283f380c4220ffeab8ea30b8e49ccee0e48728bd1c722d7e321f4e319817b622fac339d15e3a4801", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!4b368126", "long_name": "J_s1", "short_name": "J_s1", "macaddr": "w8dLNoEm", "hw_model": "NRF52_PROMICRO_DIY", "role": "CLIENT_BASE", "public_key": "/+q46jC45JzO4OSHKL0cci1+Mh9OMZgXtiL6wznRXjo=", "is_unmessagable": true, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (71 bytes)

0a0921346233363831323612044a5f73311a044a5f73312206c3c74b368126283f380c4220ffeab8ea30b8e49ccee0e48728bd1c722d7e321f4e319817b622fac339d15e3a4801

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 #25782314 Success

Packet Information

Payload Data

Decoded Data: