Packet #10327244

Database ID:	10327244
Mesh Packet ID:	`0xd18df4ac` Used for correlation across gateways
Timestamp:	2025-09-12 20:31:44 UTC
From Node:	EA5ISA-Sense (5ISA)
To Node:	EA5ISV_Heltec_3_V3 (5ISV)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	EA5ISA-Heltec-1.3 (2ISA)
Channel:	LongFast
RSSI:	-114 dBm
SNR:	-4.75 dBm
Hop Info:	1/3 hops Start: 3, Limit: 2

Long Name:	EA5ISA-Sense
Short Name:	5ISA
Node ID:	!c849c40c
MAC Address:	9n7IScQM
Hardware:	TRACKER_T1000_E

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:	75 bytes
Gateway:	!ba6549e4
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	1 / 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`	`!ba6549e4` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (75 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3360277516` Source node ID	uint32
`to`	`1127909380` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`75` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`1` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-114.0` dBm Signal strength at gateway	int32
`rx_snr`	`-4.75` dB Signal quality at gateway	float
`rx_time`	`1757709103` 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`	`233` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1757709104.3444595` 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:	`!ba6549e4`
Signal Metrics:	RSSI: -114.0 dBm SNR: -4.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	75 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!c849c40c", "long_name": "EA5ISA-Sense", "short_name": "5ISA", "macaddr": "9n7IScQM", "hw_model": "TRACKER_T1000_E" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!ba6549e4", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3360277516, "to": 1127909380, "id": 3515741356, "rx_time": 1757709103, "rx_snr": -4.75, "rx_rssi": -114, "hop_limit": 2, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 233, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216338343963343063120c4541354953412d53656e73651a04354953412206f67ec849c40c284742205a1472f51ae550551c0511ae369ea2aafd2979fd41ccfca9d5974f5fe8b09602", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!c849c40c", "long_name": "EA5ISA-Sense", "short_name": "5ISA", "macaddr": "9n7IScQM", "hw_model": "TRACKER_T1000_E", "public_key": "WhRy9RrlUFUcBRGuNp6iqv0pef1BzPyp1ZdPX+iwlgI=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (75 bytes)

0a09216338343963343063120c4541354953412d53656e73651a04354953412206f67ec849c40c284742205a1472f51ae550551c0511ae369ea2aafd2979fd41ccfca9d5974f5fe8b09602

Hex Analysis:

Size:	75 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 #10327244 Success

Packet Information

Payload Data

Decoded Data: