Kids OK with adultESP32Level 2/3
LiDAR Smart Cane
One LiDAR looks ahead for poles, another looks down for potholes, and the handle vibrates before you step.
Kids OK, with an adult
DIY project. Children must build this only with an adult (16+ years) beside them at all times. Not suitable for children under 8 years.
Use a vibration motor module with its own driver, never a bare motor on a GPIO pin. This is a learning project, not a certified mobility aid.
Strictly follow the description given with this video.
Video
The video link will be added here soon.
How it works
- The front LiDAR measures the distance to obstacles ahead.
- The ground LiDAR learns the normal ground distance at start-up.
- Ground more than 20 cm farther than normal means a drop or pothole.
- The vibration motor module buzzes in the handle to warn you.
Parts you need
- 2× LiDAR distance sensors (front + ground)× 2Buy
- ESP32 development board (30-pin)× 1Buy
- Vibration motor module (with on-board driver)× 1Buy
- USB power bank× 1Buy
Kit for this projectPrice on request
Get the kitWiring
PowerGroundSignal
| # | From | Connect to |
|---|---|---|
| 1 Signal | Front LiDAR TX | ESP32 D27 |
| 2 Signal | Front LiDAR RX | ESP32 D14 |
| 3 Signal | Ground LiDAR TX | ESP32 D33 |
| 4 Signal | Ground LiDAR RX | ESP32 D32 |
| 5 Power | Both LiDAR 5V / GND | 5V / GND rails |
| 6 Power | Vibration VCC | ESP32 3V3 |
| 7 Ground | Vibration GND | ESP32 GND |
| 8 Signal | Vibration IN | ESP32 D18 |
| 9 Signal | Power bank | ESP32 USB |
3D print files
This project has no 3D-printed parts.
Code
The tested Arduino / ESP32 code for this project will be posted here, ready to copy.