VEHICLE SPEED ALERT / ESP32 APPLICATION
Car Danger Zone
Dynamic Car Speed Controller (DSC) & Danger Zone Detection: Cyber-physical vehicle speed regulation with ESP32 telemetry, geospatial geofencing, and Android Jetpack Compose supervisory navigation.
About this project
About this project
A four-wheel test car carries an ESP32 DevKit with a NEO-6M GPS on UART2, an HC-SR04 on the front bumper, an L298N driving the motors and a 5 V piezo horn; a Kotlin and Jetpack Compose phone app does the map, the geofencing and the talking. 61 accident hotspots from Indian highways are stored as 500 m circles, split into high (40 km/h) and medium (50 km/h) risk, and the car's position is compared with the Haversine formula. Inside a zone, PWM drops from 100% to 65% or 31%; below 35 cm the ultrasonic sensor forces 0% and stops the car. Reported latencies are 42.5 ms for a geofence and 28 ms for the emergency stop. Building the app needs Android SDK 35, JDK 17 and Google Maps, OpenRouteService and Firebase keys; the firmware is one .ino that needs TinyGPSPlus.
From the README
From the README
- Sensor
- an HC-SR04 ultrasonic obstacle sensor
- Geofence
- A geofence activation condition triggers when
- Dataset
- Records: 61 georeferenced hotspots
- Result
- Mean Geofence Detection Latency: $42.5\text{ ms}$
- App
- A native Android application built with Kotlin and Jetpack Compose
Hardware
Boards: ESP32
ESP32-class board. Verify the exact board revision, display, power source and wiring in the upstream build guide.
Media credit & rights
Upstream project media · rights remain with its owner · Credit: omkar703
Screenshots from the upstream README. Code and firmware were not executed. License notices are included.
View original source ↗ Copyright & removal · Reviewed
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