return value; // 返回值的数据类型要和 dataType 一致 } ``` 在上述代码中: - `void` 是一个关键字,表示函数没有返回值。 - `dataType` 是函数返回值的数据类型,可以是`int`、`float`、`char`等。 - `functionName` 是函数的名称,可以根据需要自行命名。 - `parameterType` 是函数参数的数据类型,可...
A string read from the serial buffer readStringUntil() Description 读取字符到一个字符串,遇到停止符停止读取 readStringUntil() reads characters from the serial buffer into a string. The function terminates if the terminator character is detected or it times out (see setTimeout()). This function...
dataFile.println(dataString); dataFile.close(); // print to the serial port too: SerialUSB.println(dataString); } // if the file isn't open, pop up an error: else { SerialUSB.println("error opening datalog.txt"); } delay(15000); } // This function return a string with the time...
intsum_func (intx,inty)//function declaration {intz =0; z= x+y ;returnz;//return the value}voidsetup () { Statements//group of statements} Void loop () {intresult =0; result= Sum_func (5,6) ;//function call} 第二种方法,称为函数定义或声明,必须在循环函数的下面声明,它包括: 函...
// Declared weak in Arduino.h to allow user redefinitions.int atexit(void (* /*func*/ )()) { return 0; } // Weak empty variant initialization function.// May be redefined by variant files.void initVariant() __attribute__((weak));void initVar...
return response; } /* * Name: sendHTTPResponse * Description: Function that sends HTTP 200, HTML UTF-8 response */ void sendHTTPResponse(int connectionId, String content) { // build HTTP response String httpResponse; String httpHeader; ...
void)获取数字mgetTextDatum(void)获取文本基准width(void) //Return the pixel width of display (per current rotation)height(void) //Return the pixel height of display (per current rotation)textWidth(const String& string)返回 字符串在当前字体下的像素宽度textWidth(const String& string, uint8_t ...
return buttons; } if (var == "TEMPERATUREC") { return read_uart_data(); } return String(); } 代码如何运作 1.首先,包含必要的库: #include "main.hpp" #include "WiFi.h" #include "AsyncTCP.h" #include "ESPAsyncWebServer.h"
2.9 return 2.10 goto 九、复合运算符 9.1++(increment) 9.2 – (decrement) 9.3+=(compoundaddition) 9.4 -=(compoundsubtraction) 9.5 *=(compoundmultiplication) 9.6 /= (compound division) 9.6&=(compoundbitwiseand) 9.8|=(compoundbitwiseor)
简单来说，Windows Remote Arduino是一个开源的Windows运行时组件，通过它，我们可以使用蓝牙、USB、WiFi...