KAIRUHS 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.
🟢 Wi-Fi + LoRa
Wi-Fi 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. Hostiles show up red.
🟡 Satellite Confidence
More satellites = more accurate radar positioning.
⚡ Built-In Simulation
Spawn AI targets (jetliners, warbirds, props) with pursuit modes and browser-based tuning.
How Radar Works
Each equipped node (aircraft, wingman, ground rig, beacon) broadcasts compact GPS telemetry through the Wi-Fi + LoRa peer-to-peer system.
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, radar range, pilot ID, and vehicle ID.
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 and drivers 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 Labels
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 satellite count provides immediate feedback on GPS quality. More satellites = more accurate radar positioning and better visibility on other pilots’ radars.
Network & Performance
Wi-Fi: Instant updates (up to 20 Hz) at short to medium range.
LoRa Extension: Slower but longer-range tracking beyond Wi-Fi’s reach.
Range:
- With HW v2.2 external antennas: ~1500 ft ground-to-air at 20 Hz (air-to-air typically farther).
- Onboard antennas: Reduced effective range.
Capacity: Supports ~15 pilots/drivers; higher congestion gracefully lowers update rate.
Radio Modes & Configuration
The radar runs on a dual-radio system that blends high-speed Wi-Fi with long-range LoRa. You control how the radios behave through the menu or web config:
Radio Mode Selector:
- Off: No radio task active
- Wi-Fi only: Ultra-low latency peer-to-peer at short to medium range
- LoRa only: Long-range, lower update rate
Wi-Fi Settings:
- Wi-Fi Channel: Select 1–11 (avoid crowded channels)
- TX Power: Adjustable. 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. Lower power if issues 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: Adjustable. 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.
Display Considerations
When using radio with multiple ST7789 (1.14″) displays, some setups may experience interference. ST7735 (1.44″) displays are more stable. See manual for troubleshooting guidance on SPI speed, power supply, and cable routing.
Simulation Features
The radar can spawn simulated.
Spawn Control: Enable/disable sims, cap total count, and set spawn probability.
Behavior: Random heading/climb, pursuer mode (targets can chase your position).
Filters: Show all, friendlies only, hostiles only, or none.
Tuning in Browser: Adjust spawn rate, max count, filters, and pursuit logic live in the field.
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.
FPV Combat (Ground and Air): Track opponents in real-time tactical scenarios.
Race Gates & Common Points of Interest: Mark rally spots, gates, or mission objectives.
Simulation Training: Practice with generated targets before live engagements.
Specs at a Glance
Network: KAIRUHS Wi-Fi + LoRa peer-to-peer
Update Rate: 10–20 Hz (congestion-dependent)
Capacity: ~15 pilots/drivers supported
Range: ~1500 ft (ext. antennas, ground-air, HW v2.2); farther air-air
Radar Range: Adjustable via transmitter or fixed in menu
Display Modes: Circular (air), Landscape (ground)
Target Info: ID, altitude, distance; hostiles show up red
Legends: Radio status, satellite count, radar range, vehicle ID, pilot ID
Satellite Tracking: More satellites = better positioning accuracy
Simulation: Configurable spawns, behaviors, filters, browser-based tuning