com_port || verbose == VerboseMode::nothing) return; com_port->println(number); } void Commander::println(const float number) { if (!com_port || verbose == VerboseMode::nothing) return; com_port->println((float)number, (int)decimal_places); } void Commander::println(const char *...
(版本2) 宏定义29 整型 29 浮点数 31 数据类型31 void31 boolean32 char32 unsigned char33 byte33 int34 unsigned int35 word35 long36 unsigned long36 float37 double38 string39 String(c++)41 array42 数据类型转换44 char()44 byte()44 int()45 word()45 long()46 float()46 变量作用域修饰符...
Serial.println(stringOne); // using a float and the right decimal places: stringOne = String(5.698, 3); Serial.println(stringOne); // using a float and less decimal places to use rounding: stringOne = String(5.698, 2); Serial.println(stringOne); // do nothing while true: while (tr...
long Unsigned long short float double array String-chararray String-object 关键字 说明 void void关键字仅用于函数声明。它表示该函数预计不会向调用它的函数返回任何信息。 例子 Void Loop ( ) { // rest of the code } 1. 2. 3. Boolean 布尔值保存两个值之一,true或false。每个布尔变量占用一个字...
2、= 8复合或|= 8变量 8常量 8宏定义 8整型常量 8浮点数常量 9数据类型 9void 9boolean 10char 10unsigned char 10byte 10int 10unsigned int 10word 10long 10unsigned long 10float 10double 10string 10String(c+) 10array 10数据类型转换 10char() 10byte() 10int() 10word() 10long() 10float...
(复合或) 范围 HIGH | LOW INPUT | OUTPUT true | false 整型常量 浮点数常量数据类型void boolean char unsigned char byte int unsigned int word long unsigned long float double string String(c++) array 数据类型转换char() byte() int() word() long() float() 变量作用域变量作用域 static (...
这里有一个对象数组(数组用[]区分)employees。 每个对象里面有两个字段firstName和lastName,它们的值类型都是String。重点:无论是JSON对象还是JSON数组,它们的核心都是键值对,也就是key-value形式。3.ArduinoJson库 上面说到,ArduinoJson库有两个大版本 —— V5 和 V6。 不管是V5...
325, 0.190223) - 1) * (T * 280.4137 + 128897.8)); } void SendAltitudeToDisplay(void) { // Save the response values float ResponseP, ResponseT; // Send a request in a specific format cs.node[1]->request_handler((struct CS_Request_Struct[] ) {{ "5", "EV", "P" }}, cs...
float txValue = 0; const int readPin = 32; // Use GPIO number. See ESP32 board pinouts const int LED = 2; // Could be different depending on the dev board. I used the DOIT ESP32 dev board. //std::string rxValue; // Could also make this a global var to access it in loop(...
float16(const float16 &f)copy constructor. Conversion double toDouble(void)convert value to double or float (if the same e.g. UNO). float toFloat(void)convert value to float. String toString(unsigned int decimals = 2)convert value to a String with decimals. Please note that the accuracy...