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我有两个蓝牙模块(HC05)连接到单独的arduinos。一个充当主人,另一个充当奴隶。一个LDR连接到从属部件,它将连续读取并通过蓝牙将其发送给主部件。通过蓝牙传感器读取通信

模块成功配对。我甚至可以使用连接到从属设备的按钮来控制连接到主设备的LED。

由于4天我努力获得主控串口监视器上的LDR读数。

(具有LDR)该项目的从属部分:

#include <SoftwareSerial.h> 
SoftwareSerial BTSerial(10, 11); // RX | TX 
#define ldrPin A0 
int ldrValue = 0; 
void setup() { 
    pinMode(9, OUTPUT); // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode 
    digitalWrite(9, HIGH); 
    pinMode(ldrPin, INPUT); 
    BTSerial.begin(9600); 
    Serial.begin(9600); 

} 
void loop() 
{ 
    ldrValue = analogRead(ldrPin); 
    BTSerial.println(ldrValue); 
    Serial.println(ldrValue); 
    delay(1000); 
} 

将要获得reaings和显示串行监视器上的项目的主部分:

#include <SoftwareSerial.h> 
SoftwareSerial BTSerial(10, 11); // RX | TX 
const byte numChars = 1024; 
char receivedChars[numChars]; // an array to store the received data 

boolean newData = false; 

void setup() { 
    pinMode(9, OUTPUT); // this pin will pull the HC-05 pin 34 (key pin) HIGH to switch module to AT mode 
    digitalWrite(9, HIGH); 
    BTSerial.begin(9600); 
    Serial.begin(9600); 
    Serial.println("<Arduino is ready>"); 
} 

void loop() { 
    recvWithEndMarker(); 
    showNewData(); 
} 

void recvWithEndMarker() { 
    static byte ndx = 0; 
    char endMarker = '\n'; 
    char rc; 

    while (BTSerial.available() > 0 && newData == false) { 
     rc = BTSerial.read(); 

     if (rc != endMarker) { 
      receivedChars[ndx] = rc; 
      ndx++; 
      if (ndx >= numChars) { 
       ndx = numChars - 1; 
      } 
     } 
     else { 
      receivedChars[ndx] = '\0'; // terminate the string 
      ndx = 0; 
      newData = true; 
     } 
    } 
} 

void showNewData() { 
    if (newData == true) { 
     Serial.print("This just in ... "); 
     Serial.println(receivedChars); 
     newData = false; 
    } 
} 

但问题是在串行监视器中只有最高位(392中的3)显示在串行监视器中。读数是正确的,但不显示完整的读数。 串行监测显示反应是这样的:

<Arduino is ready> 
This just in ... 1 
This just in ... 1 
This just in ... 1 
This just in ... 1 
This just in ... 1 
This just in ... 3 
This just in ... 3 
This just in ... 3 
This just in ... 3 
This just in ... 3 

IFIN奴隶部分,而不是LDR读数,如果我发送一个字符串“hello”,则打印为:

<Arduino is ready> 
This just in ... h 
This just in ... h 
This just in ... h 
This just in ... h 
This just in ... h 
This just in ... h 

我已经提到这个串口通讯链接0​​

有人可以帮助我,因为我是新的arduino。

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相反BTSerial.read的()尝试BTSerial .readString()就像在[docs](https://www.arduino.cc/en/Serial/ReadString)中一样,并且它会容易很多@ vishruth-kumar –

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谢谢!得到它的工作! –

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太棒了!我会将其作为官方答复发布 –

回答

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直接读取一个字符串到一个变量,你可以使用:

BTSerial.readString() 

代替:

BTSerial.read() 

像官方documentation