手机和蓝牙通讯实验-蒲公英云

手机和蓝牙通讯实验

实验现象

使用android手机控制继电器的开关

理论学习

实验采用BT-HC05蓝牙模块，该模块主从一体，可以软件设置是主机还是从机。(发货默认机，波特率9600，PIN密码1234)，和手机连接使用从机模式不需要额外的设置
该模块默认就是串口的透传模式，只要连接好线就当无线串口用就可以了
手机上需要安装蓝牙串口助手，选择实施模式

原理图

在这里插入图片描述

代码编写

arduino UNO R3板子代码：

//串口中断实验
//arduino UNO R3板子代码
String inputString = "";         // a String to hold incoming data
bool stringComplete = false;  // whether the string is complete
void setup() { 
  // put your setup code here, to run once:
  Serial.begin(9600);//初始化串口设置波特率
  pinMode(13, OUTPUT);
}
void loop() { 
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13, LOW);
  delay(1000);
}
void serialEvent() { 
  while (Serial.available()) { 
    // get the new byte:
    char inChar = (char)Serial.read();
    // add it to the inputString:
    inputString += inChar;
    // if the incoming character is a newline, set a flag so the main loop can
    // do something about it:
    if (inChar == '\n') { 
      stringComplete = true;
    }
    if (stringComplete) { 
      Serial.println(inputString);
      // clear the string:
      inputString = "";
      stringComplete = false;
    }
  }
}

arduino Leonardo板子代码：

//串口中断实验
//arduino Leonardo板子代码
String inputString = "";         // a String to hold incoming data
bool stringComplete = false;  // whether the string is complete
void setup() { 
  // put your setup code here, to run once:
  Serial1.begin(9600);//初始化串口设置波特率
  pinMode(13, OUTPUT);
}
void loop() { 
  digitalWrite(13, HIGH);
  delay(1000);
  digitalWrite(13, LOW);
  delay(1000);
}
void serialEvent1() { 
  while (Serial1.available()) { 
    // get the new byte:
    char inChar = (char)Serial1.read();
    // add it to the inputString:
    inputString += inChar;
    // if the incoming character is a newline, set a flag so the main loop can
    // do something about it:
    if (inChar == '\n') { 
      stringComplete = true;
    }
    if (stringComplete) { 
      Serial1.println(inputString);
      // clear the string:
      inputString = "";
      stringComplete = false;
    }
  }
}