Packet #7417274

Database ID:	7417274
Mesh Packet ID:	`0x25dff9fa` Used for correlation across gateways
Timestamp:	2025-08-20 14:40:01 UTC
From Node:	Valdemoro_ba8c (ba8c)
To Node:	Valdemoro_1614 (1614)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Valdemoro_1614 (1614)
Channel:	MediumSlow
RSSI:	-33 dBm
SNR:	8.5 dBm
Hop Info:	0/3 hops Start: 3, Limit: 3

Latitude:	40.194657°
Longitude:	-3.678562°
Altitude:	622 m

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:	28 bytes
Gateway:	!db2f1614
Channel:	MediumSlow
Payload Type:	POSITION_APP
Hop Count:	Unknown / 3

Privacy Summary

Exposure Level:
Direct Message

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 3 more...

Exposure Risks:
⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!db2f1614` Node ID format
`channel_id`	`MediumSlow`
`packet`	`MeshPacket` (28 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`3677010572` Source node ID	uint32
`to`	`3677296148` Target node ID	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`28` bytes	size
`hop_limit`	`3` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`0` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-33.0` dBm Signal strength at gateway	int32
`rx_snr`	`8.50` dB Signal quality at gateway	float
`rx_time`	`1755700710` 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`	`20` Next hop node ID	uint32
`relay_node`	`140` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1755700801.9975882` 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
✓ Custom channel: MediumSlow
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Packet visible to MQTT subscribers
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!db2f1614`
Zero Hop Policy:	Enabled Direct gateway connection
Signal Metrics:	RSSI: -33.0 dBm SNR: 8.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	28 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 40.1946572, "longitude": -3.6785622, "altitude": 622, "sats_in_view": null, "precision_bits": null }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!db2f1614", "channel_id": "MediumSlow", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 3677010572, "to": 3677296148, "id": 635435514, "rx_time": 1755700710, "rx_snr": 8.5, "rx_rssi": -33, "hop_limit": 3, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 20, "relay_node": 140, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0dcc37f517152ab2cefd18ee0425d2dda568280348c40a7800800100", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 401946572, "longitude_i": -36785622, "altitude": 622, "time": 1755700690, "location_source": "LOC_EXTERNAL", "altitude_hae": 674, "ground_speed": 0, "ground_track": 0, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (28 bytes)

0dcc37f517152ab2cefd18ee0425d2dda568280348c40a7800800100

Hex Analysis:

Size:	28 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 #7417274 Success

Packet Information

Payload Data

Decoded Data: