Packet #27441623 Success

POSITION_APP packet from CV-Montcada-Unmg-CL8 (CV05) to !ffffffff

Total Receptions

Unique Gateways

Hop Count

Payload Bytes

Packet Information

Database ID:	27441623
Mesh Packet ID:	`0x8e91a337` Used for correlation across gateways
Timestamp:	2025-12-13 18:04:15 UTC
From Node:	CV-Montcada-Unmg-CL8 (CV05)
To Node:	!ffffffff (ffff)
Success:	Processed
Protocol:	POSITION_APP Port: 3

Gateway:	FCS t1000e (FCSt)
Channel:	LongFast
RSSI:	-67 dBm
SNR:	9.75 dBm
Hop Info:	3/5 hops Start: 5, Limit: 2
Relay Node:	`e0` FCS4 Last byte of the last hop that relayed this packet - Candidate source node(s) based on 0-hop direct receptions

Payload Data

Protocol: POSITION_APP

Size: 18 bytes

Decoded: Yes

Decoded Data:

Latitude:	41.614950°
Longitude:	2.089370°
Altitude:	330 m
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:	18 bytes
Gateway:	!b94fda02
Channel:	LongFast
Payload Type:	POSITION_APP
Hop Count:	3 / 5

Privacy Summary

Exposure Level:
Broadcast

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

Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 4 more...

MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

Field	Value
`gateway_id`	`!b94fda02` Node ID format
`channel_id`	`LongFast` Default public channel
`packet`	`MeshPacket` (18 bytes) Contains the actual mesh network packet

MeshPacket Fields

Core mesh packet with routing and payload information

Field	Value	Type
`from`	`1367752284` Source node ID	uint32
`to`	`4294967295` (Broadcast) Visible to all nodes	uint32
`decoded.portnum`	`3` POSITION_APP	enum
`decoded.payload_length`	`18` bytes	size
`hop_limit`	`2` Remaining hops allowed	uint32
`hop_start`	`5` Initial hop limit	uint32
`hops_taken`	`3` Calculated: hop_start - hop_limit	derived
`rx_rssi`	`-67.0` dBm Signal strength at gateway	int32
`rx_snr`	`9.75` dB Signal quality at gateway	float
`rx_time`	`1765649055` 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`	`224` Relay node ID	uint32
`tx_after`	Not set	uint32
`timestamp`	`1765649055.6818826` 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

Exposure Risks:

⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
⚠ 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:	`!b94fda02`
Position Precision:	32 bits (~1.0m accuracy)
Position precision meters:	`1.0`
Signal Metrics:	RSSI: -67.0 dBm SNR: 9.75 dB

Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:

Protocol:	POSITION_APP
Size:	18 bytes
Decoded:	Yes

Complete Payload Data (JSON):

{ "latitude": 41.6149504, "longitude": 2.0893696, "altitude": 330, "sats_in_view": null, "precision_bits": 32 }

Complete Protobuf Decode (JSON)

{ "service_envelope": { "gateway_id": "!b94fda02", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1367752284, "to": 4294967295, "id": 2391909175, "rx_time": 1765649055, "rx_snr": 9.75, "rx_rssi": -67, "hop_limit": 2, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 224, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00f0cd181500d03e0118ca022801b80120", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 416149504, "longitude_i": 20893696, "altitude": 330, "location_source": "LOC_MANUAL", "precision_bits": 32, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }

Raw Packet Data (18 bytes)

0d00f0cd181500d03e0118ca022801b80120

Hex Analysis:

Size:	18 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.

All Receptions

All gateways that received this packet
Correlation: Using Mesh Packet ID

Reception Locations

Loading reception map...

Map shows gateway locations that received this packet. Hop counts are displayed if available.

Gateway	Time Offset	RSSI	SNR	Hops	Relay	Channel	Timestamp	Actions
FCS t1000e (FCSt) Primary	0.000s Reference	-67.0 dBm	9.75 dB	3	`e0` FCS4	LongFast	2025-12-13 18:04:15 UTC	Current
CV-Oriol-GW-8 📡 (CVO2)	-6.473s Before	-103.0 dBm	3.25 dB	0	`5c` CV05	LongFast	2025-12-13 18:04:09 UTC	View
Rubí - FCSv4 (FCS4)	-1.647s Before	-95.0 dBm	1.50 dB	2	`0a`	LongFast	2025-12-13 18:04:14 UTC	View
StBoiCLM-8jj (SBJ1)	-0.211s Before	-125.0 dBm	-18.25 dB	3	`e0` FCS4	LongFast	2025-12-13 18:04:15 UTC	View
EAMG_rubí 🏠 (EAMG)	-0.208s Before	-87.0 dBm	-17.00 dB	3	`e0` FCS4	LongFast	2025-12-13 18:04:15 UTC	View
EA3KZ-02 Terrassa (KZ02)	-0.206s Before	-102.0 dBm	-9.75 dB	3	`e0` FCS4	LongFast	2025-12-13 18:04:15 UTC	View
EA3GRN-TORRELLES-CASA (5688)	+0.004s After	-78.0 dBm	6.50 dB	3	`2c` b02c	LongFast	2025-12-13 18:04:15 UTC	View
EA3HGK 🔗 Sant Llorenç d'Hortons (Gio)	+1.045s After	-93.0 dBm	5.25 dB	3	`f6` 32f6	LongFast	2025-12-13 18:04:16 UTC	View
EA3JAV-SBD-MPL2-CM-8 🏠 (MPL2)	+1.369s After	-49.0 dBm	6.00 dB	4	`4e` MPL1	LongFast	2025-12-13 18:04:17 UTC	View
EB3FWC-Girona📡-GW-868 (EB3F)	+4.631s After	-88.0 dBm	-1.50 dB	5	-	LongFast	2025-12-13 18:04:20 UTC	View
CROQUETASTIC-CL-868 (CRQT)	+9.284s After	-110.0 dBm	7.25 dB	3	`80` NMG , XTST	LongFast	2025-12-13 18:04:24 UTC	View
g0maintt (g0mq)	+10.259s After	-76.0 dBm	6.25 dB	4	`60` g0sr	LongFast	2025-12-13 18:04:25 UTC	View
AlienSyntax EA3IIU Bravo Node 📡 (AS2)	+11.605s After	-120.0 dBm	-10.75 dB	4	`37`	LongFast	2025-12-13 18:04:27 UTC	View
MontcadaCentro-CL-868🗼🌐 (d9e8)	+12.762s After	-75.0 dBm	6.50 dB	5	`18` SPAX	LongFast	2025-12-13 18:04:28 UTC	View
CODY-ConcaDeTremp-GW-868 (CODY)	+14.013s After	-123.0 dBm	-11.25 dB	5	`9c` Rak3	LongFast	2025-12-13 18:04:29 UTC	View

15

Total Receptions

15

Unique Gateways