Arduino实验

点灯实验

代码展示


const int buttonPin = 2;     // the number of the pushbutton pin
const int ledPin =  13;      // the number of the LED pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
}

void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);

  }
}

电位器实验

代码展示


int sensorPin = A0; // select the input pin for the potentiometer
int ledPin = 13; // select the pin for the LED
int sensorValue = 0; // variable to store the value coming from the sensor
void setup() {
 // declare the ledPin as an OUTPUT:
 pinMode(ledPin, OUTPUT);
}
void loop() {
 // read the value from the sensor:
 sensorValue = analogRead(sensorPin);
 // turn the ledPin on
 digitalWrite(ledPin, HIGH);
 // stop the program for  milliseconds:
 delay(sensorValue);
 // turn the ledPin off:
 digitalWrite(ledPin, LOW);
 // stop the program for for  milliseconds:
 delay(sensorValue);
}
//
int sensorPin = A0; // select the input pin for the potentiometer
int ledPin = 13; // select the pin for the LED
int sensorValue = 0; // variable to store the value coming from the sensor
void setup() {
 // declare the ledPin as an OUTPUT:
 pinMode(ledPin, OUTPUT);
 Serial.begin(9600);
}
void loop() {
 // read the value from the sensor:
 sensorValue = analogRead(sensorPin);
 // turn the ledPin on
 digitalWrite(ledPin, HIGH);
 // stop the program for  milliseconds:
 delay(sensorValue);
 // turn the ledPin off:
 digitalWrite(ledPin, LOW);
 // stop the program for for  milliseconds:
 delay(sensorValue);
 Serial.println(sensorValue);
 delay(1);
}

超声波测距，LCD1602显示

实物展示

代码展示


#include  //需要用的到库文件, 这个库需要到arduino ide中安装

LiquidCrystal lcd(2/*RS*/, 3/*E*/, 4/*D4*/, 5/*D5*/, 6/*D6*/, 7/*D7*/);//创建1602显示器实例




//us
// circuit

/*
Arduino        SR04
5V        ---    VCC
A0        ---    Trig
A1        ---    Echo
GND        ---    GND
*/

// pin setting

#define TrigPin A0    
// __|^|_____________
// 10us or more HITH SIGNAL will drive it work for one time

#define EchoPin A1    
// ______|^^^^^^^^|__ 
// PULSE WIDTH stand for distance(the time of ultrasound transmit, both go and back)
// pulse width WILL NOT long than 38ms, it means timeout
// Distance = Speed x Time
// Speed of sound ~= 340m/s = 0.340mm/us

int count = 0;

long duration;
// PULSE WIDTH


//湿度
#include "DHT.h"

#define DHTPIN A2     // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.

// Uncomment whatever type you're using!
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor

// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors.  This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN,DHTTYPE);





void setup() {
    // set Serial communication
    Serial.begin(115200);
    // set pin mode
    pinMode(TrigPin, OUTPUT);
    pinMode(EchoPin, INPUT);
    // init pin
    digitalWrite(TrigPin, LOW);
    delay(1);
  Serial.println(F("DHTxx test!"));

  dht.begin();





  
  lcd.begin(16, 2); //LCD初始化


  //lcd.print("hello, world!"); //LCD输出字符 hello,world!
}

void loop() {
  lcd.setCursor(0, 1);//设置光标到指定位置
  //lcd.print(millis()/1000);//显示上电到目前为止的秒数
  Serial.println(count++);
  Serial.println(getDistance());
  Serial.println("");
  Serial.println("");
  char tt="";


  
  delay(1000);

  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.println(F("°F"));

  
  lcd.clear();
  lcd.print(t);
  lcd.print("C ");
  lcd.setCursor(0, 1);//设置光标到指定位置
  lcd.print(h);
  lcd.print("% ");
}


long getDistance() {
    // trig
    digitalWrite(TrigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(TrigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(TrigPin, LOW);
    // echo
    duration = pulseIn(EchoPin, HIGH);     // unit: us
    return duration * 0.34029 / 2;         // unit: mm
}

温湿度传感实验

代码展示


#include  //需要用的到库文件, 这个库需要到arduino ide中安装

LiquidCrystal lcd(2/*RS*/, 3/*E*/, 4/*D4*/, 5/*D5*/, 6/*D6*/, 7/*D7*/);//创建1602显示器实例




//us
// circuit

/*
Arduino        SR04
5V        ---    VCC
A0        ---    Trig
A1        ---    Echo
GND        ---    GND
*/

// pin setting

#define TrigPin A0    
// __|^|_____________
// 10us or more HITH SIGNAL will drive it work for one time

#define EchoPin A1    
// ______|^^^^^^^^|__ 
// PULSE WIDTH stand for distance(the time of ultrasound transmit, both go and back)
// pulse width WILL NOT long than 38ms, it means timeout
// Distance = Speed x Time
// Speed of sound ~= 340m/s = 0.340mm/us

int count = 0;

long duration;
// PULSE WIDTH


//湿度
#include "DHT.h"

#define DHTPIN A2     // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.

// Uncomment whatever type you're using!
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor

// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors.  This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN,DHTTYPE);





void setup() {
    // set Serial communication
    Serial.begin(115200);
    // set pin mode
    pinMode(TrigPin, OUTPUT);
    pinMode(EchoPin, INPUT);
    // init pin
    digitalWrite(TrigPin, LOW);
    delay(1);
  Serial.println(F("DHTxx test!"));

  dht.begin();





  
  lcd.begin(16, 2); //LCD初始化


  //lcd.print("hello, world!"); //LCD输出字符 hello,world!
}

void loop() {
  lcd.setCursor(0, 1);//设置光标到指定位置
  //lcd.print(millis()/1000);//显示上电到目前为止的秒数
  Serial.println(count++);
  Serial.println(getDistance());
  Serial.println("");
  Serial.println("");
  char tt="";


  
  delay(1000);

  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.println(F("°F"));

  
  lcd.clear();
  lcd.print(t);
  lcd.print("C ");
  lcd.setCursor(0, 1);//设置光标到指定位置
  lcd.print(h);
  lcd.print("% ");
}


long getDistance() {
    // trig
    digitalWrite(TrigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(TrigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(TrigPin, LOW);
    // echo
    duration = pulseIn(EchoPin, HIGH);     // unit: us
    return duration * 0.34029 / 2;         // unit: mm
}

与processing联动的红绿灯实验

processing代码展示


import processing.serial.*;
Serial port;

void setup(){
  port=new Serial(this,"COM5",9600); //Arduino's com
  size(600,200);
}

void draw(){
  fill(255,0,0);
  rect(450,50,100,100);  

  fill(0,255,0);
  rect(50,50,100,100);

  fill(255,255,0);
  rect(250,50,100,100);
}

void mouseClicked(){
  if((mouseX>=50)&(mouseX<=150)&(mouseY>=50)&(mouseY<=150))
  {
    println("green");
    port.write("b");
  }
  else if((mouseX>=250)&(mouseX<=350)&(mouseY>=50)&(mouseY<=150))
  {
    println("yellow");
    port.write("c");
  }
  else if((mouseX>=450)&(mouseX<=550)&(mouseY>=50)&(mouseY<=150))
  {
    println("red");
    port.write("a");
  }
}

Arduinos代码展示


    int redPin = 3;
    int greenPin = 4;
    int bluePin = 5;
    
    int c = 0;
    
    void setup()
    {
      Serial.begin(9600);  
      pinMode(redPin,OUTPUT);
      pinMode(greenPin,OUTPUT);
      pinMode(bluePin,OUTPUT);
    }
    
    void loop()
    {
      if(Serial.available());
      c = Serial.read();
      if (c == 97)  //a in ASCII is 97
      {
        digitalWrite(redPin,HIGH);   
        delay(500);
        digitalWrite(redPin,LOW); 
      }
      if (c == 98)  //b in ASCII is 98
      {
        digitalWrite(greenPin,HIGH);   
        delay(500);
        digitalWrite(greenPin,LOW);    
      }
      if (c == 99)  
      {
        digitalWrite(bluePin,HIGH);   
        delay(500);
        digitalWrite(bluePin,LOW);
      }
    }