Packet #26997112

Database ID:	26997112
Mesh Packet ID:	`0x86b325b6` Used for correlation across gateways
Timestamp:	2025-12-11 15:41:17 UTC
From Node:	EA2DQN-ERAVI (DQN1)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	OraCle-1 (OrC1)
Channel:	LongFast
RSSI:	-107 dBm
SNR:	-20.0 dBm
Hop Info:	2/3 hops Start: 3, Limit: 1
Relay Node:	`34` RCF2 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Latitude:	42.840883°
Longitude:	-2.706637°
Altitude:	537 m
Precision:	15 bits

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:	!6ef961cf
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	2 / 3

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
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!6ef961cf` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (28 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2697706632` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`28` bytes	size
`hop_limit`	`1` Remaining hops allowed	uint32
`hop_start`	`3` Initial hop limit	uint32
`hops_taken`	`2` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-107.0` dBm Signal strength at gateway	int32
`rx_snr`	`-20.00` dB Signal quality at gateway	float
`rx_time`	`1765462055` 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`	`52` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1765467677.9759116` 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
✓ Reduced position precision: ~729.0m accuracy

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
⚠ Multi-hop path visible (2 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!6ef961cf`
Position Precision:	15 bits (~729.0m accuracy)
Position precision meters:	`729.0`
Signal Metrics:	RSSI: -107.0 dBm SNR: -20.00 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": 42.8408832, "longitude": -2.7066368, "altitude": 537, "sats_in_view": null, "precision_bits": 15 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!6ef961cf", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2697706632, "to": 4294967295, "id": 2259887542, "rx_time": 1765462055, "rx_snr": -20.0, "rx_rssi": -107, "hop_limit": 1, "hop_start": 3, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 52, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d0000891915000063fe1899042502d03a6928017800800100b8010f", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 428408832, "longitude_i": -27066368, "altitude": 537, "time": 1765462018, "location_source": "LOC_MANUAL", "ground_speed": 0, "ground_track": 0, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (28 bytes)

0d0000891915000063fe1899042502d03a6928017800800100b8010f

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 #26997112 Success

Packet Information

Payload Data

Decoded Data: