C ESP32 BluetoothSerial无法在读取数据之前检查密码

我使用带BluetoothSerial的ESP32从蓝牙接收命令。我想在读取命令数据之前检查密码

void loop() {
    
        while (SerialBT.available() > 0)   {  // detect new input
         rcvdstring = SerialBT.readString();
         cmdInt();  //invoke the command interpreter
      }
      
    }
    
    void cmdInt(void)
    {
     
        rcvdstring.trim();  // remove leading&trailing whitespace, if any
        // find index of separator ('=')
        sepIndex = rcvdstring.indexOf('=');
        if (sepIndex==-1) {  // no parameter in command
          cmdstring = rcvdstring;
          noparm = 1;   
        }
        else  {
        // extract command and parameter
          cmdstring = rcvdstring.substring(0, sepIndex);
          cmdstring.trim();
          parmstring = rcvdstring.substring(sepIndex+1); 
          parmstring.trim();
          noparm = 0;
        }
    
        //check password
        if(cmdstring.equalsIgnoreCase("1234")){
            SerialBT.println("Password correct!");
    
            //If password correct then can read this command
            if (cmdstring.equalsIgnoreCase("wifissid"))   {
              SerialBT.println(ssid);
    
            }
            else   { // Command no match
                SerialBT.println("Invalid command.");
            }  
              
        }else{
          SerialBT.println("Password wrong!");
        }
        
     }

当我输入密码1234时，输出为

Password correct!
Invalid command.

输入命令时，wifissid输出为

Password wrong!

---

看起来它可以同时检查密码和命令。我想在读取命令之前检查密码。如何修复它？

查看蓝牙设备发送的整个字符串会很有帮助。 但是，查看代码时，您正在检查cmdstring是否同时为“1234”和“wifissid”。当然，情况永远不会是这样

您的代码应该更像这样：

bool passwordCorrect = false;
void loop() {
    while (SerialBT.available() > 0)   {  // detect new input
        rcvdstring = SerialBT.readString();
        cmdInt();  //invoke the command interpreter
    }
}

void cmdInt()
{
 
    rcvdstring.trim();  // remove leading&trailing whitespace, if any
    // find index of separator ('=')
    sepIndex = rcvdstring.indexOf('=');
    if (sepIndex==-1) {  // no parameter in command
      cmdstring = rcvdstring;
      noparm = 1;   
    }
    else{
    //extract command and parameter
      cmdstring = rcvdstring.substring(0, sepIndex);
      cmdstring.trim();
      parmstring = rcvdstring.substring(sepIndex+1); 
      parmstring.trim();
      noparm = 0;
    }

    //check password
    if(cmdstring.equalsIgnoreCase("1234")){
        SerialBT.println("Password correct!");
        passwordCorrect = true;
    }else{
      SerialBT.println("Password wrong!");
    }
    //If password correct then can read this command
    if (cmdstring.equalsIgnoreCase("wifissid") && passwordCorrect)   {
      SerialBT.println(ssid);
    }else   
    { 
        // Command no match
        SerialBT.println("Invalid command.");
    }
}

我没有测试这个，但它可能会给你一个什么是错误的想法