The Bike That Calls for Help When You Crash

Edge-Impulse

Arduino Nesso N1

USB-C cable

Arduino IDE

MIT-App-Inventor

<html><body>Cyclists often ride alone, and most crashes happen with no one around to help. The gear we wear is passive: helmets, lights, and gloves protect you during a fall but do nothing to summon help after one. The usual answer is to press an SOS button on your watch, which is exactly what you can't do when you're unconscious on the ground.This project closes that gap. An Arduino Nesso N1 mounts to the bike's top tube and reads its onboard BMI270 IMU at 100 Hz. A lightweight Edge Impulse model runs directly on the board's ESP32-C6, classifying motion as either normal riding or a fall, with no cloud connection in the loop. When it confirms a crash, the board notifies a paired phone over Bluetooth LE, and the phone texts an emergency contact automatically.The full build covers collecting and labeling IMU data on the move, handling the rare-event imbalance of fall data, training and deploying a TinyML model, and wiring up the BLE-to-SMS alert chain through a simple companion app. It's a complete, low-cost example of proactive safety running on the edge, and the same approach adapts to motorcycles, skiing, or elderly fall detection.</body></html>

The Bike That Calls for Help When You Crash

An Arduino Nesso N1 reads your bike's motion, spots a crash on-device with Edge Impulse™, and texts an emergency contact, no button to press, no cloud required.