Packet #28439660 Success

POSITION_APP packet from Sierra norte Madrid ⛰️🗼🌞 (SNM) to !ffffffff

19
Total Receptions
19
Unique Gateways
4
Hop Count
15
Payload Bytes
Packet Information
Database ID: 28439660
Mesh Packet ID: 0xb859371a
Used for correlation across gateways
Timestamp: 2025-12-18 08:32:52 UTC
From Node: Sierra norte Madrid ⛰️🗼🌞 (SNM)
To Node: !ffffffff (ffff)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: Meshtastic ca85 (ca85)
Channel: MediumFast
RSSI: -47 dBm
SNR: 12.25 dBm
Hop Info: 4/4 hops
Start: 4, Limit: 0
Relay Node: dc d0dc
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: 15 bytes
Decoded: Yes
Decoded Data:
Latitude:40.724070°
Longitude:-3.892838°
Precision:14 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:15 bytes
Gateway:!4cd9ca85
Channel:MediumFast
Payload Type:POSITION_APP
Hop Count:4 / 4
Privacy Summary
Exposure Level:
Broadcast
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: MediumFast
+ 2 more...
Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 2 more...
MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

FieldValue
gateway_id !4cd9ca85
Node ID format
channel_id MediumFast
packet MeshPacket (15 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 1129719940
Source node ID 		uint32
to 4294967295 (Broadcast)
Visible to all nodes 		uint32
decoded.portnum 3
POSITION_APP 		enum
decoded.payload_length 15 bytes size
hop_limit Not set uint32
hop_start 4
Initial hop limit 		uint32
hops_taken 4
Calculated: hop_start - hop_limit 		derived
rx_rssi -47.0 dBm
Signal strength at gateway 		int32
rx_snr 12.25 dB
Signal quality at gateway 		float
rx_time 1766046742
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 220
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1766046772.4957619
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: MediumFast
  • ✓ Gateway node ID tracked
  • ✓ Reduced position precision: ~1500.0m accuracy
Exposure Risks:
  • ⚠ Visible to all nodes on channel
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ Multi-hop path visible (4 hops)
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !4cd9ca85
Position Precision: 14 bits (~1500.0m accuracy)
Position precision meters: 1500.0
Signal Metrics: RSSI: -47.0 dBm
SNR: 12.25 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:15 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 40.7240704, "longitude": -3.8928384, "altitude": null, "sats_in_view": null, "precision_bits": 14 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!4cd9ca85", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1129719940, "to": 4294967295, "id": 3092854554, "rx_time": 1766046742, "rx_snr": 12.25, "rx_rssi": -47, "hop_limit": 0, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 220, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00004618150000aefd2801b8010e", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 407240704, "longitude_i": -38928384, "location_source": "LOC_MANUAL", "precision_bits": 14, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (15 bytes)
0d00004618150000aefd2801b8010e
Hex Analysis:
Size:15 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
Meshtastic ca85 (ca85) Primary 0.000s
Reference 		-47.0 dBm 12.25 dB 4 dc d0dc MediumFast 2025-12-18 08:32:52 UTC Current
Malasaña Solar ☀️ (🌇) -37.791s
Before 		-119.0 dBm -11.50 dB 1 f5 RPT4 MediumFast 2025-12-18 08:32:14 UTC View
Karabanchel_Baldur (KarB) -37.508s
Before 		-97.0 dBm 0.50 dB 2 bb 03bb MediumFast 2025-12-18 08:32:14 UTC View
XiaoWatt c4c8 🌐🔌 (c4c8) -37.209s
Before 		-98.0 dBm -6.25 dB 1 38 tlg0 MediumFast 2025-12-18 08:32:15 UTC View
Wake Up, Neo...📡 (NEO) -37.125s
Before 		-94.0 dBm 1.25 dB 2 ec JAS MediumFast 2025-12-18 08:32:15 UTC View
Ocumare Norte🗼🌐 (RRN) -37.106s
Before 		-65.0 dBm 10.50 dB 2 98 TCLB MediumFast 2025-12-18 08:32:15 UTC View
[samsepi0l] 📡🌐 (tlg0) -36.426s
Before 		-97.0 dBm -4.00 dB 0 - MediumFast 2025-12-18 08:32:16 UTC View
🎄 SkG@Home 📡🌐 (SkGH) -36.280s
Before 		-83.0 dBm -12.75 dB 4 56 8d56 , 3d56 MediumFast 2025-12-18 08:32:16 UTC View
GRN1-Base🗼🌐 🔋 (GRN1) -35.990s
Before 		-108.0 dBm -12.25 dB 2 6a b76a MediumFast 2025-12-18 08:32:16 UTC View
P3 iGate 🏠🌐 (P3N2) -35.816s
Before 		-36.0 dBm 11.25 dB 4 25 P3N1 MediumFast 2025-12-18 08:32:16 UTC View
Meshtastic 18a4 (18a4) -35.100s
Before 		-124.0 dBm -14.50 dB 3 90 MediumFast 2025-12-18 08:32:17 UTC View
g1bal (g1b0) -34.933s
Before 		-106.0 dBm -7.50 dB 4 88 2b88 MediumFast 2025-12-18 08:32:17 UTC View
Meshtastic 1760 (1760) -34.507s
Before 		-62.0 dBm 10.25 dB 4 a4 18a4 MediumFast 2025-12-18 08:32:17 UTC View
Quass001 ☄️ (Q001) -33.559s
Before 		-50.0 dBm 10.50 dB 3 3a Q005 MediumFast 2025-12-18 08:32:18 UTC View
Fenix (FENX) -33.382s
Before 		-115.0 dBm -9.75 dB 3 88 KarB , FENX MediumFast 2025-12-18 08:32:19 UTC View
Aldinra_1640_🗼_🌐 (AldB) -32.944s
Before 		-104.0 dBm 3.50 dB 4 a4 18a4 MediumFast 2025-12-18 08:32:19 UTC View
Rodashtastic🗼🌐 (RDSt) -32.872s
Before 		-118.0 dBm -9.50 dB 3 e8 GRN1 MediumFast 2025-12-18 08:32:19 UTC View
Meshtastic 870c📡🌐 (870c) -31.281s
Before 		-95.0 dBm 8.75 dB 4 dc d0dc MediumFast 2025-12-18 08:32:21 UTC View
Varela Bot 🏡🤖 (🤖) -26.495s
Before 		-81.0 dBm 9.25 dB 1 1c 🏡 MediumFast 2025-12-18 08:32:26 UTC View
19

Total Receptions

19

Unique Gateways