Packet #2845

Database ID:	2845
Mesh Packet ID:	`0x8f8b9226` Used for correlation across gateways
Timestamp:	2025-10-21 14:28:57 UTC
From Node:	Ph-34d0 (prot) (M-01)
To Node:	art28 portable (art2)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	art28 portable (art2)
Channel:	LongFast
RSSI:	-144 dBm
SNR:	-19.25 dBm
Hop Info:	0/3 hops Start: 3, Limit: 3

Long Name:	Mobile-01 [34d0]
Short Name:	M-01
Node ID:	!bba834d0
MAC Address:	LLy7qDTQ
Hardware:	TBEAM

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:	81 bytes
Gateway:	!c0c3313c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 3

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 2 more...

Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!c0c3313c` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (81 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3148362960` Source node ID	uint32
`to`	`3234017596` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`81` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-144.0` dBm Signal strength at gateway	int32
`rx_snr`	`-19.25` dB Signal quality at gateway	float
`rx_time`	`1761042536` 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`	`208` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1761042537.2893963` 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
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!c0c3313c`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -144.0 dBm SNR: -19.25 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	81 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!bba834d0", "long_name": "Mobile-01 [34d0]", "short_name": "M-01", "macaddr": "LLy7qDTQ", "hw_model": "TBEAM" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!c0c3313c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3148362960, "to": 3234017596, "id": 2408288806, "rx_time": 1761042536, "rx_snr": -19.25, "rx_rssi": -144, "hop_limit": 3, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 208, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921626261383334643012104d6f62696c652d3031205b333464305d1a044d2d303122062cbcbba834d0280442207e1d502f07b60799f37fcb30a974223f2fda6d1c91b6b26ff68b4a2a5561ff294800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!bba834d0", "long_name": "Mobile-01 [34d0]", "short_name": "M-01", "macaddr": "LLy7qDTQ", "hw_model": "TBEAM", "public_key": "fh1QLwe2B5nzf8swqXQiPy/abRyRtrJv9otKKlVh/yk=", "is_unmessagable": false, "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (81 bytes)

0a0921626261383334643012104d6f62696c652d3031205b333464305d1a044d2d303122062cbcbba834d0280442207e1d502f07b60799f37fcb30a974223f2fda6d1c91b6b26ff68b4a2a5561ff294800

Hex Analysis:

Size:	81 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 #2845 Success

Packet Information

Payload Data

Decoded Data: