Packet #13467530 Success

POSITION_APP packet from Meshtastic a500 (a500) to !ffffffff

17
Total Receptions
15
Unique Gateways
4
Hop Count
37
Payload Bytes
Packet Information
Database ID: 13467530
Mesh Packet ID: 0x5f09fb78
Used for correlation across gateways
Timestamp: 2025-10-03 22:21:21 UTC
From Node: Meshtastic a500 (a500)
To Node: !ffffffff (ffff)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: Meshtastic 18a4 (18a4)
Channel: MediumSlow
RSSI: -125 dBm
SNR: -15.25 dBm
Hop Info: 4/4 hops
Start: 4, Limit: 0
Payload Data
Protocol: POSITION_APP
Size: 37 bytes
Decoded: Yes
Decoded Data:
Latitude:40.339866°
Longitude:-3.688858°
Altitude:810 m
Satellites:4
Precision:18 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:!c0c318a4
Channel:MediumSlow
Payload Type:POSITION_APP
Hop Count:4 / 4
Privacy Summary
Exposure Level:
Broadcast
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: MediumSlow
+ 1 more...
Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Packet visible to MQTT subscribers
+ 3 more...
MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

FieldValue
gateway_id !c0c318a4
Node ID format
channel_id MediumSlow
packet MeshPacket (37 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 2666112256
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 Not set uint32
hop_start 4
Initial hop limit 		uint32
hops_taken 4
Calculated: hop_start - hop_limit 		derived
rx_rssi -125.0 dBm
Signal strength at gateway 		int32
rx_snr -15.25 dB
Signal quality at gateway 		float
rx_time 1759530155
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 245
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1759530081.9082797
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: MediumSlow
  • ✓ Gateway node ID tracked
Exposure Risks:
  • ⚠ Visible to all nodes on channel
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ Full GPS precision shared
  • ⚠ Multi-hop path visible (4 hops)
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !c0c318a4
Position Precision: 18 bits (~91.0m accuracy)
Position precision meters: 91.0
Signal Metrics: RSSI: -125.0 dBm
SNR: -15.25 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": 40.3398656, "longitude": -3.6888576, "altitude": 810, "sats_in_view": 4, "precision_bits": 18 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!c0c318a4", "channel_id": "MediumSlow", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2666112256, "to": 4294967295, "id": 1594489720, "rx_time": 1759530155, "rx_snr": -15.25, "rx_rssi": -125, "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": 245, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00600b18150020cdfd18aa0625af4ce068280258ea017802800190be9409980104b80112", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 403398656, "longitude_i": -36888576, "altitude": 810, "time": 1759530159, "location_source": "LOC_INTERNAL", "PDOP": 234, "ground_speed": 2, "ground_track": 19210000, "sats_in_view": 4, "precision_bits": 18, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (37 bytes)
0d00600b18150020cdfd18aa0625af4ce068280258ea017802800190be9409980104b80112
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 Channel Timestamp Actions
Meshtastic 18a4 (18a4) Primary 0.000s
Reference 		-125.0 dBm -15.25 dB 4 MediumSlow 2025-10-03 22:21:21 Current
tizon (Sylv) -2.445s
Before 		-72.0 dBm 8.75 dB 2 MediumSlow 2025-10-03 22:21:19 View
Malasaña Solar ☀️ (🌇) -2.165s
Before 		-123.0 dBm -14.25 dB 2 MediumSlow 2025-10-03 22:21:19 View
Naranjo C191 🌐 (FNL) -2.138s
Before 		-116.0 dBm -7.25 dB 2 MediumSlow 2025-10-03 22:21:19 View
Venturada2🗼🌐☀️ (Vb2) -1.532s
Before 		-110.0 dBm -10.25 dB 3 MediumSlow 2025-10-03 22:21:20 View
[TLG] 📡🌐🔋🔌 (tlg0) -1.139s
Before 		-110.0 dBm -4.50 dB 3 MediumSlow 2025-10-03 22:21:20 View
GRN1-Base🗼🌐 (GRN1) -1.111s
Before 		-101.0 dBm -5.75 dB 3 MediumSlow 2025-10-03 22:21:20 View
Arganda C191 🌐 (ARG) -1.090s
Before 		-116.0 dBm -5.25 dB 3 MediumSlow 2025-10-03 22:21:20 View
Machu Pichu (MaPi) -0.724s
Before 		-105.0 dBm -5.75 dB 4 MediumSlow 2025-10-03 22:21:21 View
Villalbilla02 (VBV2) -0.639s
Before 		-109.0 dBm -0.25 dB 4 MediumSlow 2025-10-03 22:21:21 View
KIFO (14f1) -0.144s
Before 		-114.0 dBm -3.00 dB 4 MediumSlow 2025-10-03 22:21:21 View
Meshtastic 1760 (1760) -0.012s
Before 		-122.0 dBm -5.00 dB 4 MediumSlow 2025-10-03 22:21:21 View
Suop 📡 🌐 (SUOP) +0.032s
After 		-113.0 dBm -7.00 dB 4 MediumSlow 2025-10-03 22:21:21 View
Vaguada Portable (Vgda) +0.750s
After 		-105.0 dBm -6.25 dB 4 MediumSlow 2025-10-03 22:21:22 View
Kenobi23 QTH (5aec) +207.050s
After 		-99.0 dBm 2.50 dB 4 MediumSlow 2025-10-03 22:24:48 View
Kenobi23 QTH (5aec) +237.112s
After 		-99.0 dBm 2.50 dB 4 MediumSlow 2025-10-03 22:25:19 View
Kenobi23 QTH (5aec) +259.119s
After 		-99.0 dBm 2.50 dB 4 MediumSlow 2025-10-03 22:25:41 View
17

Total Receptions

15

Unique Gateways