Packet #12988938 Success

POSITION_APP packet from AlcalaHeltekV3 (C3Po) to !ffffffff

18
Total Receptions
18
Unique Gateways
3
Hop Count
28
Payload Bytes
Packet Information
Database ID: 12988938
Mesh Packet ID: 0xd8d725c7
Used for correlation across gateways
Timestamp: 2025-09-30 20:08:01 UTC
From Node: AlcalaHeltekV3 (C3Po)
To Node: !ffffffff (ffff)
Success: Processed
Protocol: POSITION_APP
Port: 3
Gateway: SkG@Home 📡🌐 (SkGH)
Channel: MediumSlow
RSSI: -112 dBm
SNR: -3.5 dBm
Hop Info: 3/5 hops
Start: 5, Limit: 2
Payload Data
Protocol: POSITION_APP
Size: 28 bytes
Decoded: Yes
Decoded Data:
Latitude:40.448819°
Longitude:-3.381658°
Altitude:589 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:28 bytes
Gateway:!405d4a44
Channel:MediumSlow
Payload Type:POSITION_APP
Hop Count:3 / 5
Privacy Summary
Exposure Level:
Broadcast
Privacy Features:
✓ Direct LoRa transmission (not via MQTT)
✓ Custom channel: MediumSlow
+ 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 !405d4a44
Node ID format
channel_id MediumSlow
packet MeshPacket (28 bytes)
Contains the actual mesh network packet
MeshPacket Fields

Core mesh packet with routing and payload information

FieldValueType
from 2661417196
Source node ID 		uint32
to 4294967295 (Broadcast)
Visible to all nodes 		uint32
decoded.portnum 3
POSITION_APP 		enum
decoded.payload_length 28 bytes size
hop_limit 2
Remaining hops allowed 		uint32
hop_start 5
Initial hop limit 		uint32
hops_taken 3
Calculated: hop_start - hop_limit 		derived
rx_rssi -112.0 dBm
Signal strength at gateway 		int32
rx_snr -3.50 dB
Signal quality at gateway 		float
rx_time 1759262880
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 86
Relay node ID 		uint32
tx_after Not set uint32
timestamp 1759262881.9599783
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
  • ✓ Reduced position precision: ~2900.0m 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: !405d4a44
Position Precision: 13 bits (~2900.0m accuracy)
Position precision meters: 2900.0
Signal Metrics: RSSI: -112.0 dBm
SNR: -3.50 dB
Complete Payload Analysis

Detailed breakdown of all payload fields and decoded data

Payload Metadata:
Protocol:POSITION_APP
Size:28 bytes
Decoded: Yes
Complete Payload Data (JSON):
{ "latitude": 40.4488192, "longitude": -3.3816576, "altitude": 589, "sats_in_view": null, "precision_bits": 13 }
Complete Protobuf Decode (JSON)
{ "service_envelope": { "gateway_id": "!405d4a44", "channel_id": "MediumSlow", "packet": "MeshPacket (see mesh_packet below)" }, "mesh_packet": { "from": 2661417196, "to": 4294967295, "id": 3637978567, "rx_time": 1759262880, "rx_snr": -3.5, "rx_rssi": -112, "hop_limit": 2, "hop_start": 5, "via_mqtt": 0, "want_ack": 0, "priority": 0, "delayed": 0, "channel_index": null, "pki_encrypted": 0, "next_hop": 0, "relay_node": 86, "tx_after": 0, "decoded": { "portnum": 3, "payload": "0d00001c18150000fcfd18cd04259938dc6828017800800100b8010d", "want_response": null, "dest": null, "source": null, "request_id": null, "reply_id": null, "emoji": null, "parsed_payload": { "latitude_i": 404488192, "longitude_i": -33816576, "altitude": 589, "time": 1759262873, "location_source": "LOC_MANUAL", "ground_speed": 0, "ground_track": 0, "precision_bits": 13, "type": "protobuf", "portnum": "POSITION_APP", "message_class": "Position" } } } }
Raw Packet Data (28 bytes)
0d00001c18150000fcfd18cd04259938dc6828017800800100b8010d
Hex Analysis:
Size:28 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
SkG@Home 📡🌐 (SkGH) Primary 0.000s
Reference 		-112.0 dBm -3.50 dB 3 MediumSlow 2025-09-30 20:08:01 Current
Venturada2🗼🌐☀️ (Vb2) -3.534s
Before 		-103.0 dBm -9.00 dB 1 MediumSlow 2025-09-30 20:07:58 View
[TLG] 📡🌐🔋🔌 (tlg0) -3.178s
Before 		-115.0 dBm -8.25 dB 1 MediumSlow 2025-09-30 20:07:58 View
Meshtastic 1760 (1760) -0.872s
Before 		-129.0 dBm -12.00 dB 2 MediumSlow 2025-09-30 20:08:01 View
Meshtastic 18a4 (18a4) -0.495s
Before 		Unknown Unknown 3 MediumSlow 2025-09-30 20:08:01 View
Ocumare_Base_🗼🌐 (CATA) +0.123s
After 		-89.0 dBm 6.25 dB 3 MediumSlow 2025-09-30 20:08:02 View
Meshtastic 2688 (2688) +0.248s
After 		-117.0 dBm -0.25 dB 3 MediumSlow 2025-09-30 20:08:02 View
Perseo 📡🌐☀ (nvm1) +0.575s
After 		-94.0 dBm -6.00 dB 2 MediumSlow 2025-09-30 20:08:02 View
Kenobi23 QTH (5aec) +1.255s
After 		-84.0 dBm 7.00 dB 4 MediumSlow 2025-09-30 20:08:03 View
Baldur Fijo (BalF) +1.483s
After 		-111.0 dBm -3.00 dB 3 MediumSlow 2025-09-30 20:08:03 View
Meshtastic c498📡🌐 (C498) +3.030s
After 		-116.0 dBm -14.50 dB 4 MediumSlow 2025-09-30 20:08:04 View
EA4HTS Ventas 🗼🇪🇸 (HTSv) +3.777s
After 		-118.0 dBm -11.25 dB 5 MediumSlow 2025-09-30 20:08:05 View
Trasto 🐰 Va (trva) +3.872s
After 		Unknown 8.25 dB 5 MediumSlow 2025-09-30 20:08:05 View
Will - Azuqueca (WAzq) +7.349s
After 		-107.0 dBm -1.75 dB 3 MediumSlow 2025-09-30 20:08:09 View
Machu Pichu (MaPi) +7.635s
After 		-97.0 dBm Unknown 3 MediumSlow 2025-09-30 20:08:09 View
Rodashtastic🗼🌐 (RDSt) +7.675s
After 		-114.0 dBm -6.00 dB 3 MediumSlow 2025-09-30 20:08:09 View
Naranjo C191 🌐 (FNL) +7.719s
After 		-114.0 dBm -9.50 dB 3 MediumSlow 2025-09-30 20:08:09 View
Mec Rocket Meco (MRM) +8.592s
After 		-34.0 dBm 8.50 dB 4 MediumSlow 2025-09-30 20:08:10 View
18

Total Receptions

18

Unique Gateways