Packet #27784493 Success

POSITION_APP packet from Calnus - Base (CALB) to Sierra norte Madrid ⛰️🗼🌞 (SNM)

8
Total Receptions
8
Unique Gateways
2
Hop Count
33
Payload Bytes
Packet Information
Database ID: 27784493
Mesh Packet ID: 0xbacc0919
Used for correlation across gateways
Timestamp: 2025-12-15 08:52:28 UTC
From Node: Calnus - Base (CALB)
To Node: Sierra norte Madrid ⛰️🗼🌞 (SNM)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: XiaoWatt c4c8 🌐🔌 (c4c8)
Channel: MediumFast
RSSI: -99 dBm
SNR: -8.75 dBm
Hop Info: 2/4 hops
Start: 4, Limit: 2
Relay Node: 44 RPT6
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: 33 bytes
Decoded: Yes
Decoded Data:
Latitude:40.448819°
Longitude:-3.434086°
Altitude:571 m
Satellites:10
Precision:13 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:33 bytes
Gateway:!3387c4c8
Channel:MediumFast
Payload Type:POSITION_APP
Hop Count:2 / 4
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
⚠ Multi-hop path visible (2 hops)
+ 1 more...
MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

FieldValue
gateway_id !3387c4c8
Node ID format
channel_id MediumFast
packet MeshPacket (33 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 2641270696
Source node ID 		uint32
to 1129719940
Target node ID 		uint32
decoded.portnum 3
POSITION_APP 		enum
decoded.payload_length 33 bytes size
hop_limit 2
Remaining hops allowed 		uint32
hop_start 4
Initial hop limit 		uint32
hops_taken 2
Calculated: hop_start - hop_limit 		derived
rx_rssi -99.0 dBm
Signal strength at gateway 		int32
rx_snr -8.75 dB
Signal quality at gateway 		float
rx_time 1765788747
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 68
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1765788748.330324
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
  • ✓ Reduced position precision: ~2900.0m accuracy
Exposure Risks:
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ Multi-hop path visible (2 hops)
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !3387c4c8
Position Precision: 13 bits (~2900.0m accuracy)
Position precision meters: 2900.0
Signal Metrics: RSSI: -99.0 dBm
SNR: -8.75 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:33 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 40.4488192, "longitude": -3.4340864, "altitude": 571, "sats_in_view": 10, "precision_bits": 13 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!3387c4c8", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2641270696, "to": 1129719940, "id": 3133933849, "rx_time": 1765788747, "rx_snr": -8.75, "rx_rssi": -99, "hop_limit": 2, "hop_start": 4, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 68, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00001c18150000f4fd18bb042537cc3f692802587e780080010098010ab8010d", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 404488192, "longitude_i": -34340864, "altitude": 571, "time": 1765788727, "location_source": "LOC_INTERNAL", "PDOP": 126, "ground_speed": 0, "ground_track": 0, "sats_in_view": 10, "precision_bits": 13, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (33 bytes)
0d00001c18150000f4fd18bb042537cc3f692802587e780080010098010ab8010d
Hex Analysis:
Size:33 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
XiaoWatt c4c8 🌐🔌 (c4c8) Primary 0.000s
Reference 		-99.0 dBm -8.75 dB 2 44 RPT6 MediumFast 2025-12-15 08:52:28 UTC Current
Mec Rocket Meco (MRM) -18.656s
Before 		-110.0 dBm -9.75 dB 0 a8 CALB MediumFast 2025-12-15 08:52:09 UTC View
Rodashtastic🗼🌐 (RDSt) -11.538s
Before 		-115.0 dBm -6.25 dB 1 e8 GRN1 MediumFast 2025-12-15 08:52:16 UTC View
GRN1-Base🗼🌐 🔋 (GRN1) -9.567s
Before 		-98.0 dBm -1.75 dB 0 a8 CALB MediumFast 2025-12-15 08:52:18 UTC View
JAGO1_Cañaveral (JAGO) +49.099s
After 		-113.0 dBm -4.50 dB 3 84 SNM , Ancr , 📡 MediumFast 2025-12-15 08:53:17 UTC View
Ocumare Norte🗼🌐 (RRN) +52.589s
After 		-108.0 dBm -13.00 dB 4 b0 Vbm , Vb2 MediumFast 2025-12-15 08:53:20 UTC View
NodeJPL6 (JPL6) +52.653s
After 		-96.0 dBm -7.50 dB 4 b0 Vb2 MediumFast 2025-12-15 08:53:20 UTC View
Venturada2 🗼🌞 (Vb2) +53.307s
After 		-102.0 dBm -6.75 dB 3 af RPT7 MediumFast 2025-12-15 08:53:21 UTC View
8

Total Receptions

8

Unique Gateways