Packet #3901251

Database ID:	3901251
Mesh Packet ID:	`0x675d6536` Used for correlation across gateways
Timestamp:	2025-07-16 18:06:05 UTC
From Node:	Hugo 📱🌡️ (HUGO)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	NODEINFO_APP Port: 4

Gateway:	Hugo 📱🌡️ (HUGO)
Channel:	LongFast
RSSI:	Unknown
SNR:	Unknown
Hop Info:	0/5 hops Start: 5, Limit: 5

Long Name:	Hugo 📱🌡️
Short Name:	HUGO
Node ID:	!f1c9ead8
MAC Address:	0czxyerY
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:	81 bytes
Gateway:	!f1c9ead8
Channel:	LongFast
Payload Type:	NODEINFO_APP
Hop Count:	Unknown / 5

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 1 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!f1c9ead8` 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`	`4056541912` 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`	`5` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	Not set	int32
`rx_snr`	Not set	float
`rx_time`	`1752678552` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	`10` Packet priority level	enum
`delayed`	Not set	enum
`channel`	Not set	uint32
`pki_encrypted`	False Standard encryption	bool
`next_hop`	Not set	uint32
`relay_node`	`216` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1752689165.0266006` 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
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers

MQTT-Specific Fields

Gateway ID:	`!f1c9ead8`
Zero Hop Policy:	Enabled Direct gateway connection

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": "!f1c9ead8", "long_name": "Hugo 📱🌡️", "short_name": "HUGO", "macaddr": "0czxyerY", "hw_model": "TRACKER_T1000_E" }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!f1c9ead8", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 4056541912, "to": 4294967295, "id": 1734174006, "rx_time": 1752678552, "rx_snr": 0.0, "rx_rssi": 0, "hop_limit": 5, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 10, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 216, "tx_after": 0, "decoded": { "portnum": 4, "payload": "0a0921663163396561643812104875676f20f09f93b1f09f8ca1efb88f1a044855474f2206d1ccf1c9ead82847380142202b321b4b6b51aa96857b8e6ed776c2580f6251bdc93dbda95d2e99e291458725", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "id": "!f1c9ead8", "long_name": "Hugo 📱🌡️", "short_name": "HUGO", "macaddr": "0czxyerY", "hw_model": "TRACKER_T1000_E", "role": "CLIENT_MUTE", "public_key": "KzIbS2tRqpaFe45u13bCWA9iUb3JPb2pXS6Z4pFFhyU=", "type": "protobuf", "portnum": "NODEINFO_APP", "message_class": "User" } } } }

Raw Packet Data (81 bytes)

0a0921663163396561643812104875676f20f09f93b1f09f8ca1efb88f1a044855474f2206d1ccf1c9ead82847380142202b321b4b6b51aa96857b8e6ed776c2580f6251bdc93dbda95d2e99e291458725

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 #3901251 Success

Packet Information

Payload Data

Decoded Data: