Packet #29908416

Database ID:	29908416
Mesh Packet ID:	`0x7faa4dcb` Used for correlation across gateways
Timestamp:	2025-12-24 21:31:26 UTC
From Node:	Alex (A.MC)
To Node:	EA5HBZ (JFML)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	Alex (A.MC)
Channel:	MediumFast
RSSI:	Unknown
SNR:	Unknown
Hop Info:	0/2 hops Start: 2, Limit: 2
Relay Node:	`40` A.MC Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Latitude:	37.962957°
Longitude:	-1.221837°
Altitude:	71 m
Precision:	19 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:	27 bytes
Gateway:	!9e75c440
Channel:	MediumFast
Payload Type:	POSITION_APP
Hop Count:	Unknown / 2

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
⚠ Full GPS precision shared

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!9e75c440` Node ID format
`channel_id`	`MediumFast`
`packet`	`MeshPacket` (27 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`2658518080` Source node ID	uint32
`to`	`2658558248` Target node ID	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`27` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`2` 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`	`1766611869` Receive timestamp	fixed32
`via_mqtt`	False Direct LoRa transmission	bool
`want_ack`	False No ACK requested	bool
`priority`	`70` 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`	`64` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1766611886.3635345` 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: MediumFast
✓ Gateway node ID tracked
✓ Zero-hop: direct from source to MQTT gateway

Exposure Risks:

⚠ Packet visible to MQTT subscribers
⚠ Full GPS precision shared

MQTT-Specific Fields

Gateway ID:	`!9e75c440`
Position Precision:	19 bits (~45.0m accuracy)
Position precision meters:	`45.0`
Zero Hop Policy:	Enabled Direct gateway connection

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	27 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 37.9629568, "longitude": -1.2218368, "altitude": 71, "sats_in_view": null, "precision_bits": 19 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!9e75c440", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2658518080, "to": 2658558248, "id": 2141867467, "rx_time": 1766611869, "rx_snr": 0.0, "rx_rssi": 0, "hop_limit": 2, "hop_start": 2, "via_mqtt": 0, "want_ack": 0, "priority": 70, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 64, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00b0a01615009045ff1847259d5b4c6928037800800100b80113", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 379629568, "longitude_i": -12218368, "altitude": 71, "time": 1766611869, "location_source": "LOC_EXTERNAL", "ground_speed": 0, "ground_track": 0, "precision_bits": 19, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (27 bytes)

0d00b0a01615009045ff1847259d5b4c6928037800800100b80113

Hex Analysis:

Size:	27 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 #29908416 Success

Packet Information

Payload Data

Decoded Data: