Packet #3078268

Database ID:	3078268
Mesh Packet ID:	`0xb1670c46` Used for correlation across gateways
Timestamp:	2025-08-19 10:23:14 UTC
From Node:	PH-3544-TBeam-🔌 (PHTB)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Meshtastic 4e50 (4e50)
Channel:	LongFast
RSSI:	-123 dBm
SNR:	-13.25 dBm
Hop Info:	3/7 hops Start: 7, Limit: 4

Long Name:	PH-3544-TBeam-🔌
Short Name:	PHTB
Node ID:	!1f9fde2c
MAC Address:	CLYfn94s
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:	!da544e50
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	3 / 7

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`	`!da544e50` 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`	`530570796` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`81` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-123.0` dBm Signal strength at gateway	int32
`rx_snr`	`-13.25` dB Signal quality at gateway	float
`rx_time`	`1755591678` 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`	Not set	uint32
`tx_after`	Not set	uint32
`timestamp`	`1755591794.4424047` 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 (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!da544e50`
Signal Metrics:	RSSI: -123.0 dBm SNR: -13.25 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": "!1f9fde2c", "long_name": "PH-3544-TBeam-🔌", "short_name": "PHTB", "macaddr": "CLYfn94s", "hw_model": "TBEAM" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!da544e50", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 530570796, "to": 4294967295, "id": 2976320582, "rx_time": 1755591678, "rx_snr": -13.25, "rx_rssi": -123, "hop_limit": 4, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 0, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09213166396664653263121250482d333534342d544265616d2df09f948c1a0450485442220608b61f9fde2c28044220233380f28609f9ae4338a7f31583f3c0e92ec613023557111dcb075e0d28e87a", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!1f9fde2c", "long_name": "PH-3544-TBeam-🔌", "short_name": "PHTB", "macaddr": "CLYfn94s", "hw_model": "TBEAM", "public_key": "IzOA8oYJ+a5DOKfzFYPzwOkuxhMCNVcRHcsHXg0o6Ho=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (81 bytes)

0a09213166396664653263121250482d333534342d544265616d2df09f948c1a0450485442220608b61f9fde2c28044220233380f28609f9ae4338a7f31583f3c0e92ec613023557111dcb075e0d28e87a

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 #3078268 Success

Packet Information

Payload Data

Decoded Data: