Packet #28665317 Success

POSITION_APP packet from GJ T1000 (GJ89) to !ffffffff

9
Total Receptions
9
Unique Gateways
3
Hop Count
37
Payload Bytes
Packet Information
Database ID: 28665317
Mesh Packet ID: 0x43641f22
Used for correlation across gateways
Timestamp: 2025-12-19 12:17:38 UTC
From Node: GJ T1000 (GJ89)
To Node: !ffffffff (ffff)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: EAL Station 1 🗼🌐 (EAL1)
Channel: MediumFast
RSSI: -110 dBm
SNR: -3.75 dBm
Hop Info: 3/7 hops
Start: 7, Limit: 4
Relay Node: a4 📍
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:38.187827°
Longitude:-1.893990°
Altitude:601 m
Satellites:6
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:!7c5ac2c4
Channel:MediumFast
Payload Type:POSITION_APP
Hop Count:3 / 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 !7c5ac2c4
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 2945126916
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 4
Remaining hops allowed 		uint32
hop_start 7
Initial hop limit 		uint32
hops_taken 3
Calculated: hop_start - hop_limit 		derived
rx_rssi -110.0 dBm
Signal strength at gateway 		int32
rx_snr -3.75 dB
Signal quality at gateway 		float
rx_time 1766146657
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 164
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1766146658.7198303
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 (3 hops)
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !7c5ac2c4
Position Precision: 15 bits (~729.0m accuracy)
Position precision meters: 729.0
Signal Metrics: RSSI: -110.0 dBm
SNR: -3.75 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": 38.1878272, "longitude": -1.8939904, "altitude": 601, "sats_in_view": 6, "precision_bits": 15 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!7c5ac2c4", "channel_id": "MediumFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2945126916, "to": 4294967295, "id": 1130635042, "rx_time": 1766146657, "rx_snr": -3.75, "rx_rssi": -110, "hop_limit": 4, "hop_start": 7, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 164, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d0000c316150000dffe18d9042566424569280258cb0278018001c8cf9609980106b8010f", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 381878272, "longitude_i": -18939904, "altitude": 601, "time": 1766146662, "location_source": "LOC_INTERNAL", "PDOP": 331, "ground_speed": 1, "ground_track": 19245000, "sats_in_view": 6, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (37 bytes)
0d0000c316150000dffe18d9042566424569280258cb0278018001c8cf9609980106b8010f
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
EAL Station 1 🗼🌐 (EAL1) Primary 0.000s
Reference 		-110.0 dBm -3.75 dB 3 a4 📍 MediumFast 2025-12-19 12:17:38 UTC Current
CARREFOUR ea5wa (WA01) -0.034s
Before 		-111.0 dBm -4.25 dB 3 a4 📍 MediumFast 2025-12-19 12:17:38 UTC View
Albacete_01 🛜 (Ab01) +0.770s
After 		-112.0 dBm -11.75 dB 4 47 EAL2 MediumFast 2025-12-19 12:17:39 UTC View
San_Pablo🗼 (SP00) +1.181s
After 		-118.0 dBm -10.00 dB 5 c0 5HIG , MIK6 MediumFast 2025-12-19 12:17:39 UTC View
🇪🇸EA5URM📟⚡🇪🇸🌍📡 (URE) +4.776s
After 		-135.0 dBm -11.25 dB 6 - MediumFast 2025-12-19 12:17:43 UTC View
NarKT3S3📡 (NKT3) +7.730s
After 		-113.0 dBm -7.75 dB 7 0c 30BV MediumFast 2025-12-19 12:17:46 UTC View
JP Terraza (JPT1) +10.577s
After 		-109.0 dBm 0.75 dB 6 88 MediumFast 2025-12-19 12:17:49 UTC View
Karman’s HeltecV4 Beta (KHV4) +11.989s
After 		-108.0 dBm -14.25 dB 7 64 ALT1 MediumFast 2025-12-19 12:17:50 UTC View
Meshtastic 3dc0 (3dc0) +12.175s
After 		-96.0 dBm -6.75 dB 7 7c SpB1 MediumFast 2025-12-19 12:17:50 UTC View
9

Total Receptions

9

Unique Gateways