https://github.com/RobTillaart/PrintCharArray (captures data in a char buffer) https://github.com/RobTillaart/PrintSize (counts length of a number of print commands) https://github.com/RobTillaart/PrintString (captures data in a String) Interface #include "PrintCharArray.h" PrintCharArray...
11.13 string( char array/字符串) 11.14 String object( String类) 11.15 array(数组) 十二、数据类型转换 12.1 char() 12.2 byte() 12.3int() 12.4 word() 12.5 long() 12.6 float() 十三、变量作用域&修饰符 13.1 variable scope(变量的作用域) 13.2 static(静态变量) 13.3 volatile 13.4 const 十四、...
在Arduino常用的数据类型有:整型int,long长整型,浮点型float,字符型char还有布尔型 boolean,其他的还有byte,word。short数据类型用的很少。void将来在自定义函数时再看,array数组也放在数组部分介绍,String 被称谓字符串对象,它主要帮助我们处理字符串,比如查找字符,修改字符,分割字符等等。 常用的int 、long 、float、...
char P_NAME[] = " "; //设置热点名称 char P_PSWD[] = " "; //设置热点密码 char sub[] = "Sub/100052"; //设置设备SUB名称 char pub[] = "Pub/100052"; //设置设备PUB名称 const char *ssid = P_NAME; const char *password = P_PSWD; const char *mqtt_server = "121.5.58.100"; S...
void setup() { char my_str[6]; // an array big enough for a 5 character string Serial.begin(9600); my_str[0] = 'H'; // the string consists of 5 characters my_str[1] = 'e'; my_str[2] = 'l'; my_str[3] = 'l'; my_str[4] = 'o'; my_str[5] = 0; // 6th ...
byte a = compass.getAzimuth(); char myArray[3]; compass.getDirection(myArray, a); Serial.print(myArray[0]); Serial.print(myArray[1]); Serial.print(myArray[2]); Serial.println(); delay(250); } 实验串口返回情况 模块实验接线示意图 Arduino实验场景图...
Serial.print((char)first[i]); } } void writeMsg(byte* first, size_t len) { for(int i = 0; i 《 len; i++) { EEPROM.write(i, first[i]); } } void readMsg(size_t len) { byte res; Serial.print(“Message: ”);
char c='A'; String d="hello world";//字符串 unsigned int e;//无符号整型,范围0-65535 unsigned long f;//无符号长整型,范围0-4294967295 const int g=1;//表示为常量整数,常亮定义后,不能对他的值进行更改。 Arduino 语法手册 http://wiki.geek-workshop.com/doku.php?id=arduino:arduino_languag...
结构体所有元素的内存是独享的,char 数据类型占用1个字节,float 数据类型占用4个字节,那定义了结构体后,结构体占用的空间就是5字节(上左图),而联合体不同,定义了联合体后,联合体内元素占用的空间是共享的,以占用空间最大的元素为基准作为联合体的占用空间,例如上面float是4个字节比另一个元素char占用一个字节多...
char c = Wire.read(); // receive a byte as character Serial.print(c); // print the character } delay(500); } Wire.setClock()修改I2C通信的频率,标准值是100KHz Description This function modifies the clock frequency for I2C communication. I2C slave devices have no minimum working clock frequ...