Packet #1290254

Database ID:	1290254
Mesh Packet ID:	`0xe1b17c6c` Used for correlation across gateways
Timestamp:	2025-06-20 02:05:28 UTC
From Node:	Base@zAlex (@leB)
To Node:	Meshtastic 507c (507c)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Meshtastic 507c (507c)
Channel:	LongFast
RSSI:	-5 dBm
SNR:	7.0 dBm
Hop Info:	0/2 hops Start: 2, Limit: 2

Long Name:	AlcTest001v2🚛
Short Name:	AlcT
Node ID:	!7aa6f6ec
MAC Address:	NJh6pvbs
Hardware:	HELTEC_V2_1

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:	!849a507c
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 2

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`	`!849a507c` 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`	`2057762540` Source node ID	uint32
`to`	`2224705660` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`81` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`2` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-5.0` dBm Signal strength at gateway	int32
`rx_snr`	`7.00` dB Signal quality at gateway	float
`rx_time`	`1750385125` 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`	`124` Next hop node ID	uint32
`relay_node`	`236` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1750385128.2670388` 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:	`!849a507c`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -5.0 dBm SNR: 7.00 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": "!7aa6f6ec", "long_name": "AlcTest001v2🚛", "short_name": "AlcT", "macaddr": "NJh6pvbs", "hw_model": "HELTEC_V2_1" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!849a507c", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2057762540, "to": 2224705660, "id": 3786505324, "rx_time": 1750385125, "rx_snr": 7.0, "rx_rssi": -5, "hop_limit": 2, "hop_start": 2, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 124, "relay_node": 236, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a092137616136663665631210416c63546573743030317632f09f9a9b1a04416c6354220634987aa6f6ec280a42204f87bf2a9eb7281cb464c54f05d6a1ebb2f106efd7699cee4d5ca2a4f9a644584800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!7aa6f6ec", "long_name": "AlcTest001v2🚛", "short_name": "AlcT", "macaddr": "NJh6pvbs", "hw_model": "HELTEC_V2_1", "public_key": "T4e/Kp63KBy0ZMVPBdah67LxBu/XaZzuTVyipPmmRFg=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (81 bytes)

0a092137616136663665631210416c63546573743030317632f09f9a9b1a04416c6354220634987aa6f6ec280a42204f87bf2a9eb7281cb464c54f05d6a1ebb2f106efd7699cee4d5ca2a4f9a644584800

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 #1290254 Success

Packet Information

Payload Data

Decoded Data: