[Arduino] 안드로이드 앱 실습 (mit, bluetooth, chat)

#블루투스 이름, 속도, pin번호 정하기

모니터:

CMD: AT

Return: OK

CMD: AT

Return: OK

CMD: AT+NAMEsongBT

Return: OKsetname

CMD: AT+BAUD4

Return: OK9600

CMD: AT+PIN1234

Return: OKsetPIN

CMD: 

코드:

#include <SoftwareSerial.h>

#define RXD_PIN 2

#define TXD_PIN 3

SoftwareSerial bt(RXD_PIN, TXD_PIN);

char data;

void setup() {

  Serial.begin(9600);

  bt.begin(9600);

  Serial.println("Ready...");

  

}

void loop() {

  Serial.flush();

  Serial.print("CMD: ");

  while(!Serial.available());

  while(Serial.available()) {

    data = Serial.read();

    if(data == -1) break;

    bt.print(data);

    Serial.print(data);

    delay(1);

    

  }

  Serial.println();

  delay(1000);

  Serial.print("Return: ");

  while(bt.available())

  {

    data = bt.read();

    if(data == -1) break;

    Serial.print(data);

    delay(1);

    

  }

  Serial.print("\n\n");

  

}

예제 02 Aruduino와 smart App의 블루투스 통신 실습

#include <SoftwareSerial.h>

#define RXD_PIN 2

#define TXD_PIN 3

#define ledPin  13

#define BUFF_SIZE 256

SoftwareSerial swBT(RXD_PIN, TXD_PIN);

uint8_t buffer[BUFF_SIZE];

uint8_t index = 0;

uint8_t data;

void setup() {

  swBT.begin(9600);

  Serial.begin(9600);

  pinMode(ledPin, OUTPUT);

  

}

void loop() {

  digitalWrite(ledPin, LOW);

  while(!swBT.available());

  digitalWrite(ledPin,  HIGH);

  while(swBT.available())

  {

    data = swBT.read();

    buffer[index++] = data;

    if(index == BUFF_SIZE || data == '\0')

      break;

      delay(1);

  }

  for(uint8_t i = 0; i < index; ++i) {

    swBT.write(buffer[i]);

  }

  index = 0;

}

실습 휴대폰 - 아두이노 채팅

#include <SoftwareSerial.h>

SoftwareSerial btSerial(2,3);

void setup() {

  // put your setup code here, to run once:

  Serial.begin(9600);

  btSerial.begin(9600);

}

void loop() {

  // put your main code here, to run repeatedly:

  if(btSerial.available()){

    Serial.write(btSerial.read());

  }

  if(Serial.available()){

    btSerial.write(Serial.read());

  }

}

\===========================================

#include <SoftwareSerial.h>

SoftwareSerial btSerial(2,3);

String btString ="";

void setup() {

  // put your setup code here, to run once:

  Serial.begin(9600);

  btSerial.begin(9600);

}

void loop() {

  // put your main code here, to run repeatedly:

  while(btSerial.available()){

    char btChar = (char)btSerial.read();

    btString+=btChar;

    delay(10);

  }

  if(!btString.equals("")){

    Serial.println("recv : "+btString);

    btString="";

  }

  while(Serial.available()){

    char btChar = (char)Serial.read();

    btString+=btChar;

    delay(10);

  }

  if(!btString.equals("")){

    btSerial.println(btString);

   // Serial.println("INPUT : "+btString);

    btString="";

  }

}

실습:mit app inventor 폰에 깔아서 arduino led on/off 폰으로 제어

#include <SoftwareSerial.h>

SoftwareSerial BTSerial(2,3);

void setup() {

  // put your setup code here, to run once:

  BTSerial.begin(9600);

  pinMode(13, OUTPUT);

}

void loop() {

  // put your main code here, to run repeatedly:

  if(BTSerial.available()){

    char data = BTSerial.read();

    //Serial.write(data);

    if(data=='0'){

      digitalWrite(13, HIGH);

    }else if(data=='1'){

      digitalWrite(13,LOW);

    }

  }

}