Published November 24, 2022

Powering with Love-Automatic Sensor Crossing Light

Be a warm light in your dark night

BeginnerFull instructions provided1 hour206

Powering with Love-Automatic Sensor Crossing Light

Things used in this project

Hardware components

Seeed Studio XIAO nRF52840 Sense (XIAO BLE Sense)

All the XIAO can be use in this project

Seeed Studio XIAO Expansion Board

Seeed Studio Grove - Ultrasonic Ranger

Seeed Studio Grove - WS2813 RGB LED Strip Waterproof - 60 LED/m - 1m

Software apps and online services

Arduino IDE

Story

Have you ever been in a completely dark room and hit your toe on a table or stepped on something like a lego? Or are you concerned about grandparents falling down the stairs to use the restroom because there is no aisle light? I was concerned about all of the above, so I created an Automatic Sensor Crossing Light.

This project is based on Seeed Studio's XIAO as the controller, connecting with the XIAO expansion board, and then using the Ultrasonic distance sensor to sense the distance, allowing the RGB Light Strip to be illuminated to achieve a long-distance automatic light.

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The image above shows XIAO connected to the XIAO Expansion Board, which has four Grove ports at the same time. This simplifies the project because all you need to do is plug and play and you're ready to go.

If you don't have an XIAO expansion board, you can connect it with a jump wire. The sensor and RGB Strip Pinout for the XIAO and the project are listed below.

Pinout

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Features

To ensure the safety of nighttime walking
Easy to build with, friendly for beginners.

Get start

Hardware required

Seeed Studio XIAO Series （In my case I use XIAO BLE Sense)
Seeed Studio XIAO expansion board
Seeed Studio Grove - Ultrasonic Distance Sensor
Seeed Studio Grove - RGB LED Strip

Connection

Because there is no wiring diagram, pictures must be used to demonstrate how to connect the sensor and RGB light strip.

According to the Seeed Studio page, both products use digital as output and all four ports of the XIAO Expansion Board support digital, allowing you to connect those components to any of the four Grove ports.

Instruction

Step 1. Connecting all the components to the XIAO Expansion Board/ XIAO Pinout

Step 2. Download the Arduino IDE

Step3. Please install the Seeeduino XIAO board manager, follow the instruction

Step 4. Adding UltrasonicRanger and RGB Light Strip library install. If you do not know how to install the library. please go to this guide.

Step 5. Copy the code and stick it on the Arduino IDE then upload it.

Code

All the code for this project

#include <Ultrasonic.h>
#include "Adafruit_NeoPixel.h"
Ultrasonic ultrasonic(A0);// Set PIN

int ledstripPin = A3;// Set PIN
int intnumber;
#define NUMPIXELS      48 // Set # of Pixels 
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, ledstripPin, NEO_GRB + NEO_KHZ800);

 
int delayval = 1;
void setup() {
  Serial.begin(9600);
  pinMode(A3,OUTPUT);
  pinMode(A0,INPUT);
 
#if defined (__AVR_ATtiny85__)
  if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif

  pixels.setBrightness(150);
  pixels.begin();
}

void loop() {

long sensorvalue;
long MeasureIn;



  sensorvalue = ultrasonic.MeasureInCentimeters();

 int sensor = (int)sensorvalue;
  Serial.print("cm");
  Serial.println(sensorvalue);
  Serial.println(sensor);
  if(sensor<30){ // Set your Range : Example:I set the range in 30CM
    
     for(int i=0;i<NUMPIXELS;i++){
 
    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
    pixels.setPixelColor(i, pixels.Color(50,100,50)); // Moderately bright green color.
 
    pixels.show(); // This sends the updated pixel color to the hardware.
 
    delay(delayval);
    Serial.println("1");
  }
  }
  else if(sensor>30){// Set your Range : Example:I set the range in 30CM

    
 for(int i=0;i<NUMPIXELS;i++){
    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
    pixels.setPixelColor(i, pixels.Color(0,0,0)); // Moderately bright green color.
 
    pixels.show(); 
 
    delay(delayval);
    Serial.println("2");
 }
  }



}

Powering with Love-Automatic Sensor Crossing Light

Things used in this project

Hardware components

Software apps and online services

Story

Pinout

Features

Get start

Connection

Instruction

Schematics

Connecting all the components

Code

All the code for this project

Credits

XIANGYI XIA

Comments

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Powering with Love-Automatic Sensor Crossing Light

Powering with Love-Automatic Sensor Crossing Light

Things used in this project

Hardware components

Software apps and online services

Story

Pinout

Features

Get start

Connection

Instruction

Schematics

Connecting all the components

Code

All the code for this project

Credits

XIANGYI XIA

Comments

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