Packet #28172657 Success

POSITION_APP packet from EA5AYC SENSECAP (5ayc) to !ffffffff

7
Total Receptions
7
Unique Gateways
6
Hop Count
37
Payload Bytes
Packet Information
Database ID: 28172657
Mesh Packet ID: 0x1318219d
Used for correlation across gateways
Timestamp: 2025-12-17 01:35:35 UTC
From Node: EA5AYC SENSECAP (5ayc)
To Node: !ffffffff (ffff)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: Jorge LR0 (JLR0)
Channel: MediumFast
RSSI: -92 dBm
SNR: 8.0 dBm
Hop Info: 6/7 hops
Start: 7, Limit: 1
Relay Node: 91 CN2
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: 37 bytes
Decoded: Yes
Decoded Data:
Latitude:38.043648°
Longitude:-1.671168°
Altitude:666 m
Satellites:7
Precision:15 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:37 bytes
Gateway:!8a9d934c
Channel:MediumFast
Payload Type:POSITION_APP
Hop Count:6 / 7
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 !8a9d934c
Node ID format
channel_id MediumFast
packet MeshPacket (37 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 1986881505
Source node ID 		uint32
to 4294967295 (Broadcast)
Visible to all nodes 		uint32
decoded.portnum 3
POSITION_APP 		enum
decoded.payload_length 37 bytes size
hop_limit 1
Remaining hops allowed 		uint32
hop_start 7
Initial hop limit 		uint32
hops_taken 6
Calculated: hop_start - hop_limit 		derived
rx_rssi -92.0 dBm
Signal strength at gateway 		int32
rx_snr 8.00 dB
Signal quality at gateway 		float
rx_time 1765935670
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 145
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1765935335.7645833
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: ~729.0m accuracy
Exposure Risks:
  • ⚠ Visible to all nodes on channel
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ Multi-hop path visible (6 hops)
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !8a9d934c
Position Precision: 15 bits (~729.0m accuracy)
Position precision meters: 729.0
Signal Metrics: RSSI: -92.0 dBm
SNR: 8.00 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:37 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 38.043648, "longitude": -1.671168, "altitude": 666, "sats_in_view": 7, "precision_bits": 15 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!8a9d934c", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 1986881505, "to": 4294967295, "id": 320348573, "rx_time": 1765935670, "rx_snr": 8.0, "rx_rssi": -92, "hop_limit": 1, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 145, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d0000ad1615000001ff189a0525e2084269280258eb0178008001b08bca0e980107b8010f", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 380436480, "longitude_i": -16711680, "altitude": 666, "time": 1765935330, "location_source": "LOC_INTERNAL", "PDOP": 235, "ground_speed": 0, "ground_track": 30574000, "sats_in_view": 7, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (37 bytes)
0d0000ad1615000001ff189a0525e2084269280258eb0178008001b08bca0e980107b8010f
Hex Analysis:
Size:37 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
Jorge LR0 (JLR0) Primary 0.000s
Reference 		-92.0 dBm 8.00 dB 6 91 CN2 MediumFast 2025-12-17 01:35:35 UTC Current
EAL Station 1 🗼🌐 (EAL1) -1.983s
Before 		-111.0 dBm -3.50 dB 3 a4 📍 , NOD4 MediumFast 2025-12-17 01:35:33 UTC View
Karman’s HeltecV4 Beta (KHV4) -0.810s
Before 		-66.0 dBm 9.00 dB 6 37 1337 MediumFast 2025-12-17 01:35:34 UTC View
San_Pablo🗼 (SP00) -0.524s
Before 		-118.0 dBm -11.50 dB 4 47 EAL2 MediumFast 2025-12-17 01:35:35 UTC View
EA5WA TRASTERO (WA01) -0.509s
Before 		-93.0 dBm 9.50 dB 4 47 EAL2 MediumFast 2025-12-17 01:35:35 UTC View
JP Terraza (JPT1) -0.484s
Before 		-99.0 dBm 1.75 dB 6 37 KTS1 , 1337 MediumFast 2025-12-17 01:35:35 UTC View
Albacete_01 🛜 (Ab01) +1.293s
After 		-100.0 dBm -1.25 dB 5 d8 HIR0 MediumFast 2025-12-17 01:35:37 UTC View
7

Total Receptions

7

Unique Gateways