Packet #17968688 Success

POSITION_APP packet from VE7DCX Repeater (7DCX) to !06ca331c

1
Total Receptions
1
Unique Gateways
0
Hop Count
18
Payload Bytes
Packet Information
Database ID: 17968688
Mesh Packet ID: 0x55bc306d
Used for correlation across gateways
Timestamp: 2026-03-27 18:43:32 UTC
From Node: VE7DCX Repeater (7DCX)
To Node: !06ca331c (331c)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: VE7DCX Repeater (7DCX)
Channel: LongFast
RSSI: Unknown
SNR: Unknown
Hop Info: 0/4 hops
Start: 4, Limit: 4
Relay Node: 94 7DCX
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: 18 bytes
Decoded: Yes
Decoded Data:
Latitude:49.623859°
Longitude:-115.946291°
Altitude:951 m
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:18 bytes
Gateway:!9e779694
Channel:LongFast
Payload Type:POSITION_APP
Hop Count:Unknown / 4
Privacy Summary
Exposure Level:
Direct Message
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Targeted to specific node
+ 3 more...
Exposure Risks:
⚠ Default channel - no encryption
⚠ Packet visible to MQTT subscribers
MQTT ServiceEnvelope Fields

MQTT ServiceEnvelope contains the MeshPacket plus routing metadata

FieldValue
gateway_id !9e779694
Node ID format
channel_id LongFast
Default public channel
packet MeshPacket (18 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 2658637460
Source node ID 		uint32
to 113914652
Target node ID 		uint32
decoded.portnum 3
POSITION_APP 		enum
decoded.payload_length 18 bytes size
hop_limit 4
Remaining hops allowed 		uint32
hop_start 4
Initial hop limit 		uint32
hops_taken 0
Calculated: hop_start - hop_limit 		derived
rx_rssi Not set int32
rx_snr Not set float
rx_time 1774637003
Receive timestamp 		fixed32
via_mqtt False
Direct LoRa transmission 		bool
want_ack False
No ACK requested 		bool
priority 70
Packet priority level 		enum
delayed Not set enum
channel Not set uint32
pki_encrypted False
Standard encryption 		bool
next_hop Not set uint32
relay_node 148
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1774637012.3675134
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
  • ✓ Gateway node ID tracked
  • ✓ Reduced position precision: ~2900.0m accuracy
  • ✓ Zero-hop: direct from source to MQTT gateway
Exposure Risks:
  • ⚠ Default channel - no encryption
  • ⚠ Packet visible to MQTT subscribers
MQTT-Specific Fields
Gateway ID: !9e779694
Position Precision: 13 bits (~2900.0m accuracy)
Position precision meters: 2900.0
Zero Hop Policy: Enabled
Direct gateway connection
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:18 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 49.6238592, "longitude": -115.9462912, "altitude": 951, "sats_in_view": null, "precision_bits": 13 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!9e779694", "channel_id": "LongFast", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2658637460, "to": 113914652, "id": 1438396525, "rx_time": 1774637003, "rx_snr": 0.0, "rx_rssi": 0, "hop_limit": 4, "hop_start": 4, "via_mqtt": false, "want_ack": false, "priority": 70, "delayed": 0, "channel_index": null, "pki_encrypted": false, "next_hop": 0, "relay_node": 148, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d0000941d150000e4ba18b7072801b8010d", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 496238592, "longitude_i": -1159462912, "altitude": 951, "location_source": "LOC_MANUAL", "precision_bits": 13, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (18 bytes)
0d0000941d150000e4ba18b7072801b8010d
Hex Analysis:
Size:18 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
Gateway Time Offset RSSI SNR Hops Relay Channel Timestamp Actions
VE7DCX Repeater (7DCX) Primary 0.000s
Reference 		Unknown Unknown 0 94 7DCX LongFast 2026-03-27 18:43:32 UTC Current
No other receptions found within ±2 seconds
1

Total Receptions

1

Unique Gateways