Packet #415929 Success

POSITION_APP packet from Purex-CL-8 (PURX) to !ffffffff

4
Total Receptions
3
Unique Gateways
0
Hop Count
22
Payload Bytes
Packet Information
Database ID: 415929
Mesh Packet ID: 0x08e7687b
Used for correlation across gateways
Timestamp: 2026-04-27 22:22:46 UTC
From Node: Purex-CL-8 (PURX)
To Node: !ffffffff (ffff)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: fjndb1-CL-8 (ftt9)
Channel: LongFast
RSSI: -109 dBm
SNR: -15.75 dBm
Hop Info: 0/4 hops
Start: 4, Limit: 4
Relay Node: b0 PURX
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: 22 bytes
Decoded: Yes
Decoded Data:
Latitude:38.699008°
Longitude:-9.338880°
Altitude:72 m
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:22 bytes
Gateway:!1de930c8
Channel:LongFast
Payload Type:POSITION_APP
Hop Count:0 / 4
Privacy Summary
Exposure Level:
Broadcast
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Gateway node ID tracked
+ 2 more...
Exposure Risks:
⚠ Visible to all nodes on channel
⚠ Default channel - no encryption
+ 2 more...
MQTT ServiceEnvelope Fields

FieldValue
gateway_id !1de930c8
Node ID format
channel_id LongFast
Default public channel
packet MeshPacket (22 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Canonical MeshPacket view reconstructed from stored protobuf bytes.

FieldValueType
from 268854192
Source node ID 		uint32
to 4294967295 (Broadcast)
Visible to all nodes 		uint32
decoded.portnum POSITION_APP
POSITION_APP 		enum
decoded.payload_length 22 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 -109.0 dBm
Signal strength at gateway 		int32
rx_snr -15.75 dB
Signal quality at gateway 		float
rx_time 1777328565
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 8
Channel index 		uint32
pki_encrypted False
Standard encryption 		bool
next_hop Not set uint32
relay_node 176
Relay node ID 		uint32
tx_after Not set uint32
timestamp Not set 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)
  • ✓ Gateway node ID tracked
  • ✓ Reduced position precision: ~729.0m accuracy
  • ✓ Zero-hop: direct from source to MQTT gateway
Exposure Risks:
  • ⚠ Visible to all nodes on channel
  • ⚠ Default channel - no encryption
  • ⚠ Packet visible to MQTT subscribers
  • ⚠ RF signal metrics exposed (location inference possible)
MQTT-Specific Fields
Gateway ID: !1de930c8
Position Precision: 15 bits (~729.0m accuracy)
Position precision meters: 729.0
Zero Hop Policy: Enabled
Direct gateway connection
Signal Metrics: RSSI: -109.0 dBm
SNR: -15.75 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:22 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 38.699008, "longitude": -9.33888, "altitude": 72, "sats_in_view": null, "precision_bits": 15 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "packet": { "from": 268854192, "to": 4294967295, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAERcVAABv+hhIKAF4AIABALgBDw==", "bitfield": 1 }, "id": 149383291, "rx_time": 1777328565, "rx_snr": -15.75, "hop_limit": 4, "rx_rssi": -109, "hop_start": 4, "relay_node": 176, "transport_mechanism": "TRANSPORT_LORA" }, "channel_id": "LongFast", "gateway_id": "!1de930c8" }, "mesh_packet": { "from": 268854192, "to": 4294967295, "channel": 8, "decoded": { "portnum": "POSITION_APP", "payload": "DQAAERcVAABv+hhIKAF4AIABALgBDw==", "bitfield": 1, "parsed_payload": { "latitude_i": 386990080, "longitude_i": -93388800, "altitude": 72, "location_source": "LOC_MANUAL", "ground_speed": 0, "ground_track": 0, "precision_bits": 15, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } }, "id": 149383291, "rx_time": 1777328565, "rx_snr": -15.75, "hop_limit": 4, "rx_rssi": -109, "hop_start": 4, "relay_node": 176, "transport_mechanism": "TRANSPORT_LORA" } }
Raw Packet Data (22 bytes)
0d000011171500006ffa184828017800800100b8010f
Hex Analysis:
Size:22 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
fjndb1-CL-8 (ftt9) Primary 0.000s
Reference 		-109.0 dBm -15.75 dB 0 b0 PURX LongFast 2026-04-27 22:22:46 UTC Current
2 hops Gateways that received this packet after 2 hops
TQB06-Zambujal-GT-8 (TQB6) +1260.519s
After 		-113.0 dBm -11.75 dB 2 38 LongFast 2026-04-27 22:43:46 UTC View
TQB06-Zambujal-GT-8 (TQB6) +2800.767s
After 		-111.0 dBm -6.75 dB 2 fe LongFast 2026-04-27 23:09:26 UTC View
4 hops Gateways that received this packet after 4 hops
A48-FX Sintra (A48) +4256.493s
After 		-100.0 dBm 2.75 dB 4 fe RL21 LongFast 2026-04-27 23:33:42 UTC View
4

Total Receptions

3

Unique Gateways