LoRa/WiFi Radar - Kairuhs — RC HUD, Telemetry & Radar Displays

KAIRUHS Fastlink Radar

Real-Time FPV Radar & Team Awareness

Key Features

🔴 Real-Time Radar
Peer-to-peer updates at up to 20 Hz with zero internet or cellular dependency.
🟢 Hybrid Fastlink + LoRa
Fastlink handles close-range speed; LoRa extends awareness well beyond visual line of sight.
🟣 Multi-Layout Displays
Circular air radar and landscape ground radar.
🔵 Target Intelligence
ID, altitude, and distance labels with cyan friendlies and red hostiles for instant clarity.
🟡 Satellite Confidence
SAT icon color scale: Orange <7 sats, White 8–18, Cyan 19+.
⚡ Built-In Simulation
Spawn AI targets (jetliners, warbirds, props) with pursuit modes and browser-based tuning.
🛠 Creative Mesh Uses
Shared ground points, recovery beacons, pit dashboards, and relay nodes. The network grows with the community.
📡 Expandable Ecosystem
Designed for the KAIRUHS quad-display system with full HUD overlay integration.

Built as more than an instrument, Fastlink Radar is a community-driven network for pilots. linking aircraft, ground rigs, and creative nodes into a shared tactical picture.

The KAIRUHS Fastlink Radar is not just a display, it’s a full tactical awareness platform for FPV pilots. Powered by our hybrid mesh system, it combines ultra-low latency Fastlink updates for close-range encounters with LoRa’s extended reach for long-range awareness. Fastlink Radar continuously exchanges position data between aircraft and ground nodes, updating targets in real time without internet or cellular service. Up to 15 pilots can be supported simultaneously, with graceful performance degradation when the network gets busy.

How Fastlink Radar Works

Each equipped node (aircraft, wingman, ground rig, beacon) broadcasts compact GPS telemetry through the Fastlink + LoRa mesh.
The radar fuses those broadcasts into a tactical picture: your ownship at center, with others rendered as bearing/distance/altitude blips.
A home/hangar icon anchors your saved home point.
Legend shows radio status, satellite count, current range, pilot ID, and connected radio node presence.

Display Modes & Layouts

Air (Circular) Radar: For intercepts, formation flying, and dogfights.
Ground (Landscape) Radar: Square-grid layout optimized for surface vehicles.
Adaptive Range: Selectable ranges that scale the radar grid for both near and far engagements. Range can be controlled directly from your transmitter (mapped channel) with adjustable endpoints in the menu, giving you fine-grained control over minimum and maximum distance. Pilots can also lock the radar to a fixed distance for consistent scaling during training, races, or specific mission profiles.
Declutter & Filters: Show all, friendlies only, hostiles only, or hide all targets.

Target Logic & Symbology

Colors: Cyan = friendly, Red = hostile.
Labels: ID, altitude, and distance appear alongside each target.
Legends: Critical data at top and bottom of screen to prevent clutter in the grid.

GPS & Satellite Confidence

The SAT icon provides a color scale for GPS quality, so pilots instantly know how reliable their positioning is:

Orange: Fewer than 7 satellites (low confidence).
White: 8–18 satellites (good lock).
Cyan: 19 or more satellites (high precision).

This gives immediate feedback on GPS geometry before committing to maneuvers or relying on network data.

Network & Performance

Fastlink Mesh: Instant updates (up to 20 Hz) at short to medium range.
LoRa Extension: Slower but longer-range tracking beyond Fastlink’s reach.
Range:
- With HW v2.1 external antennas: ~1300 ft ground-to-air at 20 Hz (air-to-air typically farther).
- Onboard antennas: Reduced effective range.
- LoRa max range: Not fully tested in this release, but extends significantly beyond Fastlink’s envelope.
Capacity: Supports ~15 pilots; higher congestion gracefully lowers update rate.

Radio Modes & Configuration

Fastlink Radar runs on a dual-radio system that blends high-speed Fastlink with long-range LoRa. You control how the radios behave through the menu or web config:

Radio Mode Selector:
- Off: No radio task active
- Fastlink only: Ultra-low latency peer-to-peer at short to medium range
- LoRa only: Long-range, lower update rate
- Hybrid: Runs both radios, combining Fastlink’s speed with LoRa’s reach
Fastlink Settings:
- Wi-Fi Channel: Select 1–11 (avoid crowded channels)
- TX Power: Adjustable from −1 dBm to ~15.0 dBm. Higher is not always better—balance with antenna gain.
- Long-Range Mode: Extends coverage, but may not be permitted in all regions.
- ⚠ Caution: Excessive TX power can cause instability or boot loops. Lower power if resets occur.
LoRa Settings:
- Region: US (902–928 MHz), EU (863–870 MHz), or Custom
- Center Frequency: Example US: 915.0 MHz; EU: 869.5 MHz
- Bandwidth: 125 / 250 / 500 kHz (500 kHz US-only). Narrower = longer range.
- TX Power: Up to 15.0 dBm recommended max. Use external antennas for best results.
- Band Helper (EU):
  - 868.0–868.6 MHz
  - 868.7–869.2 MHz
  - 869.4–869.65 MHz (≤250 kHz BW)
- ⚠ Compliance: You are responsible for following local FCC/RED limits.

This section ensures pilots know how to set up radios safely, avoid boot loop traps, and stay compliant.

Simulation Features

Fastlink Radar isn’t limited to live telemetry, it can also spawn simulated traffic.

Spawn Control: Enable/disable sims, cap total count, and set spawn probability.
Classes: Jetliners, warbirds, props.
Behavior: Random heading/climb, pursuer mode (targets can chase your position), class-specific speed/turn rates, loop-back logic if overshot.
Filters: Show all, friendlies only, hostiles only, or none.
Tuning in Browser: Adjust spawn rate, max count, filters, pursuit logic, and friend/foe ratio live in the field.

Visual Design & Efficiency

Palette-Driven Rendering: High contrast, crisp updates, minimal CPU overhead.
Grid Geometry: Concentric rings (air) or horizon-weighted grid (ground) tuned for rapid situational reads.
Optimized Labels: Compact distance + altitude text ensures legibility without clutter.

Use Cases

Dogfights & Combat Events: Real-time tracking makes merges and maneuvers more tactical.
Formation Flying: Stay tight with your wingman while keeping situational awareness.
Simulation Training: Practice with generated targets before live engagements.

Creative Uses & Future Potential

Fastlink Radar is more than an instrument, it’s a canvas for pilot creativity. With every aircraft, rig, or beacon acting as a node, pilots can invent entirely new ways to fly and collaborate:

Shared Ground Points: Drop common reference nodes to mark rally spots, gates, or mission objectives.
Search & Recovery: Use multiple ground nodes to triangulate and recover downed aircraft faster.
Field Events: Build dynamic race courses, combat zones, or cooperative missions using the mesh as a live map.
Ground Dashboards: Imagine military-style field stations or big-screen pit crew displays showing the same radar picture as the pilots.

⚡ The real potential lies in what pilots dream up. Fastlink Radar isn’t locked into one use, it’s an evolving platform, shaped by community feedback and experiments. Every firmware update and every pilot innovation pushes it closer to a true tactical network.

Specs at a Glance

Network: KAIRUHS Fastlink + LoRa hybrid
Update Rate: 10–20 Hz (congestion-dependent)
Capacity: ~15 pilots supported
Range: ~1300 ft (ext. antennas, ground-air); farther air-air; LoRa extension untested max
Display Modes: Circular (air), Landscape (ground)
Target Info: ID, altitude, distance; cyan = friendly, red = hostile
Legends: radio status, sats, range, vehicle ID, pilot ID, node status
Satellite Scale: Orange (<7 sats), White (8–18), Cyan (19+)
Simulation: Configurable spawns, behaviors, filters, browser-based tuning
Integration: Quad-display ecosystem + HUD overlay, menu adjustable, NVS saved

⚡ Bottom line: The KAIRUHS Fastlink Radar is the first hybrid FPV radar built for both combat and teamwork. With real-time peer-to-peer awareness, satellite confidence scaling, flexible layouts, creative mesh applications, and even built-in traffic simulation, it isn’t just telemetry, it’s a tactical advantage and a platform for the community to shape.