手机和蓝牙通讯实验

浅浅的花香味﹌ 2022-12-19 08:43 183阅读 0赞

# 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][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NjcxNzMy_size_16_color_FFFFFF_t_70_pic_center]

### 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;
        }
      }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NjcxNzMy_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/c3ee56115504466889f2afb97eeee9c3.png