Packet #41379

Database ID:	41379
Mesh Packet ID:	`0xa66f0f06` Used for correlation across gateways
Timestamp:	2026-02-18 19:35:18 UTC
From Node:	Bill KI6GQX/WRUK677 (WTK)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	EZ Portable - HDMesh.org (EZP)
Channel:	LongMod
RSSI:	-103 dBm
SNR:	3.5 dBm
Hop Info:	3/7 hops Start: 7, Limit: 4
Relay Node:	`a9` Last byte of the last hop that relayed this packet

Latitude:	34.459973°
Longitude:	-117.249393°
Altitude:	846 m
Satellites:	10
Precision:	32 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:	42 bytes
Gateway:	!4358a000
Channel:	LongMod
Payload Type:	POSITION_APP
Hop Count:	3 / 7

Privacy Summary

Exposure Level:
Broadcast

Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: LongMod
+ 1 more...

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 3 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!4358a000` Node ID format
`channel_id`	`LongMod`
`packet`	`MeshPacket` (42 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`4019564361` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`42` bytes	size
`hop_limit`	`4` Remaining hops allowed	uint32
`hop_start`	`7` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-103.0` dBm Signal strength at gateway	int32
`rx_snr`	`3.50` dB Signal quality at gateway	float
`rx_time`	`1771443312` 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`	`169` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1771443318.1523042` 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)
✓ Custom channel: LongMod
✓ Gateway node ID tracked

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
⚠ Full GPS precision shared
⚠ Multi-hop path visible (3 hops)
⚠ RF signal metrics exposed (location inference possible)

MQTT-Specific Fields

Gateway ID:	`!4358a000`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -103.0 dBm SNR: 3.50 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	42 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 34.4599733, "longitude": -117.2493933, "altitude": 846, "sats_in_view": 10, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!4358a000", "channel_id": "LongMod", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 4019564361, "to": 4294967295, "id": 2792296198, "rx_time": 1771443312, "rx_snr": 3.5, "rx_rssi": -103, "hop_limit": 4, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 169, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0db52c8a141593291dba18ce06255114966928023d35149669588b0178018001808fdd0998010ab80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 344599733, "longitude_i": -1172493933, "altitude": 846, "time": 1771443281, "location_source": "LOC_INTERNAL", "timestamp": 1771443253, "PDOP": 139, "ground_speed": 1, "ground_track": 20400000, "sats_in_view": 10, "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (42 bytes)

0db52c8a141593291dba18ce06255114966928023d35149669588b0178018001808fdd0998010ab80120

Hex Analysis:

Size:	42 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 #41379 Success

Packet Information

Payload Data

Decoded Data: