Changes

• Closing speed detection — Smoothed closing speed calculated from last 3 distance samples. Vehicles closing at ≥36 km/h differential are auto-escalated one threat level (Approaching→Warning, Warning→Critical). Vehicles holding distance or receding are suppressed — no more alerts for traffic matching your speed.
• Traffic density adaptation — Rolling 30-second average of vehicle count. When sustained heavy traffic (≥2 vehicles for 10+ seconds) is detected, Approaching alerts are suppressed. Fast-closing vehicles are escalated first, so they bypass density suppression and always break through.
• Target change detection — Distance jumps >30 m automatically reset closing speed tracking. When a vehicle passes and a new one appears, the system starts fresh instead of producing invalid speed data.

How It Works Together

On a busy road: normal traffic is silent. A fast-closing vehicle gets escalated to Warning → bypasses density suppression AND triggers throttler escalation bypass → immediate alert.

Critical alerts always fire regardless of any suppression. No new settings — fully automatic.

Changes

• Remove non-functional haptic/vibration feature — Karoo has no vibration motor (only a piezo buzzer), so HapticEngine was entirely non-functional. Removed the vibration toggle from settings and stopped advertising it as a feature.
• Remove dead volume control — Karoo SDK doesn't support volume adjustment. Removed the unused soundVolume field.
• Fix StatisticsCollector resource leak — Coroutine scope is now properly cancelled on extension destroy.
• Update documentation — README and website now accurately describe 2 alert channels (banner + sound).

Alert Channels

New feature

• Quick mute toggle — assign to a physical button or remote in Karoo Controls settings
  • Mutes all alerts (sound, vibration, banner) with one press
  • Data fields continue showing radar data with "MUTED" indicator
  • Press again to re-enable alerts
  • Auto-unmutes when ride ends for safety
  • Ideal for group rides where nearby cyclists trigger false alerts

Bug fix

• Fix incorrect default settings for new users:
  • Approaching distance: 150m → 100m (correct silent awareness zone)
  • Speed gate: 5 km/h → Off (disabled by default as recommended)
  • Clear chime: Off → On (safe-to-maneuver confirmation)
  • Haptic alerts: Off → On (most reliable alert channel while cycling)

Improvements

• Rounded corners on data field widgets
• Status bar properly inset to avoid corner overflow
• Cleaner visual appearance across all widget sizes

What's new

• Redesigned data fields — dark background with colored status bar and colored text values instead of solid color backgrounds. Fixes corner color clipping. Cleaner hierarchy, better outdoor readability.
• Shared widget components — extracted reusable GlanceComponents (DataFieldContainer, StatusBar, ValueText, LabelText)
• Consistent -- display for all disconnected/inactive states

Install

Download eiradar.apk and sideload to your Karoo via USB or web installer.

What's new

• App icon — proper adaptive launcher icon with branded gradient background and radar rings
• Minor internal improvements

Install

Download eiradar.apk and sideload to your Karoo via USB or web installer.

eiRadar v1.0.0

First public release. Rear radar alert extension for Hammerhead Karoo 2/3.

Features

• 3 data field layouts — Small (1x1), Medium (2x1), Large (2x2)
• Multi-channel alerts — Visual banner, sound patterns, haptic vibration
• 4 sound sets — Classic, Subtle, Urgent, Bike Bell
• 3 threat levels — Approaching, Warning, Critical with color coding
• Speed gate — Suppress minor alerts at low speed (critical alerts always fire)
• Night mode — Auto-detected, extends detection thresholds by 33%
• All-clear chime — Confirms when road is clear again
• Screen wake — Configurable wake-on-alert policy
• Imperial/Metric — Automatic unit detection from Karoo profile
• Ride statistics — Vehicle detections, alerts, closest approach tracking
• Fully offline — No accounts, no cloud, no internet required

Installation

Download eiradar.apk and install via ADB or Hammerhead Companion app.

Compatible Radars

Any ANT+ cycling radar.