STEM教育 · 猪年小猪送吉：Arduino Uno控制的互动小猪

猪年年关快要到了。先祝大家新年愉快。这个项目是用一个Arduino uno来主控，通过小猪头上的超声模块来探测前方物体。如果探测到了。就通过DFPlayer mini MP3模块来说话。并且小猪为表示愉快，还会通过伺服电机来摇头晃脑。而且随着PING前方物体的向前的移动，MP3会回以不同的问候语句。

猪年小猪送吉图2

首先这个连线图上的连线是要调整的。原因是我用的那个连线图工具，不能自由的改连线的接脚。大家看我改过的图。
[mw_shl_code=applescript,true]/*---------Made by Gada888 2019-01-10------*/
[mw_shl_code=applescript,true]//-----------IMPORT LIB-----------
#include <Servo.h>
#include <SoftwareSerial.h>
#include <DFPlayer_Mini_Mp3.h>
//--------INICIALIZE----------
Servo myServo;
int pos = 0;
int trig = 2;
int echo = 3;
//--------------SETUP-------------
void setup () {
  Serial.begin (9600);
myServo.attach(9);
pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  mp3_set_serial (Serial);
  mp3_set_volume (25);
}
//-------------LOOPING------------
void loop () {

  int duration , distance;
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo, HIGH);
  distance = (duration / 2) / 21.9;
  Serial.print(distance);
  Serial.print("cm");
  delay(50);
  if (distance < 3)
  {
  mp3_play (1);
  delay (2000);

  {
  }
  }
else if ((3 < distance) && (distance < 6))
  {
  mp3_play (2);
  delay (2000);
}
  else if ((6< distance) && (distance < 9))
  {
  mp3_play (3);
  delay (2000);
myServo.write(30);
  delay (500);
myServo.write(-30);
  delay (500);
myServo.write(30);
  delay (500);
myServo.write(-30);
  delay (500);
myServo.write(30);
  delay (500);
myServo.write(-30);
  delay (500);
}
  else if ((9 < distance) && (distance < 12))
  {
  mp3_play (4);
  delay (1000);
  myServo.write(30);
  delay (500);
myServo.write(-30);
  delay (500);
myServo.write(30);
  delay (500);
myServo.write(-30);
  delay (500);
myServo.write(30);
  delay (500);
myServo.write(-30);
  delay (500);
}
}[/mw_shl_code]

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