Program arduino untuk Alat pengingat Cuci Tangan

Halo sobat Arduino Indonesia, gencar gencarnya cuci tangan pada saat ini guna menaggulangi virus corona atau covid-19. kami sendiri yang sering lupa untuk cuci tangan ketika masuk rumah, berinisiatif untuk membuat alat yang bisa membantu mengingatkan buat cuci tangan.

Bahan-bahan yang diperlukan adalah sebagai berikut :

1. Arduino nano 
2. Sensor ultrasonic 
3. Mp3 Player (DFPlayer mini) 
4. Speaker 
5. Breadboard 
6. Kabel Jumper

untuk penyusunan pengkabelan bisa di lihat di video berikut :

Coding untuk Project Alat pencuci tangan Otomatis adalah sebagai berikut :

/*
 * Alat Cuci Tangan Otomatis
 * Sekolah Robot Indonesia
 */
 #include "Arduino.h"
#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"
#include <NewPing.h>

#define TRIGGER_PIN  6  // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define ECHO_PIN     7  // Arduino pin tied to echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.

NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
SoftwareSerial mySoftwareSerial(4, 2); // RX, TX
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

int data = 0;
void setup() {
  mySoftwareSerial.begin(9600);
  Serial.begin(115200); // Open serial monitor at 115200 baud to see ping results.
Serial.println();
  Serial.println(F("DFRobot DFPlayer Mini Demo"));
  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));
 
  if (!myDFPlayer.begin(mySoftwareSerial)) {  //Use softwareSerial to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while(true){
      delay(0); // Code to compatible with ESP8266 watch dog.
    }
  }
  Serial.println(F("DFPlayer Mini online."));
 
  myDFPlayer.volume(30);  //Set volume value. From 0 to 30
  myDFPlayer.play(1);  //Play the first mp3
}

void loop() {
  delay(50);                     // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
  static unsigned long timer = millis();
  Serial.print("Ping: ");
  Serial.print(sonar.ping_cm()); // Send ping, get distance in cm and print result (0 = outside set distance range)
  Serial.println("cm");
   if(sonar.ping_cm()>1 && sonar.ping_cm() <6)
 {

 if (millis() - timer > 4500) {
    timer = millis();
    myDFPlayer.next();  //Play next mp3 every 3 second.
  }
  }
}

*sumber video : https://youtu.be/dDFZZFkg-d4