Packet #3877833

Database ID:	3877833
Mesh Packet ID:	`0x778d3c75` Used for correlation across gateways
Timestamp:	2025-07-16 12:17:08 UTC
From Node:	Solar@zAlex (@le2)
To Node:	SierraLaPila 868 ⛰️📡 (PILA)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	🌴ParadiSe 🌴 (pRdS)
Channel:	LongFast
RSSI:	-97 dBm
SNR:	1.75 dBm
Hop Info:	1/4 hops Start: 4, Limit: 3

Long Name:	Solar@zAlex
Short Name:	@le2
Node ID:	!a8ea5c5a
MAC Address:	xmyo6lxa
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:	76 bytes
Gateway:	!ae61b778
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`	`!ae61b778` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (76 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2833931354` Source node ID	uint32
`to`	`113870924` Target node ID	uint32
`decoded.portnum`	`4` NODEINFO_APP	enum
`decoded.payload_length`	`76` 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`	`-97.0` dBm Signal strength at gateway	int32
`rx_snr`	`1.75` dB Signal quality at gateway	float
`rx_time`	`1752668227` 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`	`134` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752668228.2661831` 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:	`!ae61b778`
Signal Metrics:	RSSI: -97.0 dBm SNR: 1.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	NODEINFO_APP
Size:	76 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "id": "!a8ea5c5a", "long_name": "Solar@zAlex", "short_name": "@le2", "macaddr": "xmyo6lxa", "hw_model": "NRF52_PROMICRO_DIY" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!ae61b778", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2833931354, "to": 113870924, "id": 2005744757, "rx_time": 1752668227, "rx_snr": 1.75, "rx_rssi": -97, "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": 134, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a09216138656135633561120b536f6c6172407a416c65781a04406c65322206c66ca8ea5c5a283f4220f125da1eee8c867fc527f6f0a1f15d51a48f5fe5343a33f4902916e572d8c3414800", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!a8ea5c5a", "long_name": "Solar@zAlex", "short_name": "@le2", "macaddr": "xmyo6lxa", "hw_model": "NRF52_PROMICRO_DIY", "public_key": "8SXaHu6Mhn/FJ/bwofFdUaSPX+U0OjP0kCkW5XLYw0E=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (76 bytes)

0a09216138656135633561120b536f6c6172407a416c65781a04406c65322206c66ca8ea5c5a283f4220f125da1eee8c867fc527f6f0a1f15d51a48f5fe5343a33f4902916e572d8c3414800

Hex Analysis:

Size:	76 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 #3877833 Success

Packet Information

Payload Data

Decoded Data: