int num1 = 123; float num2 = 3.14; const char* str = "Hello, Arduino!"; String str1 = String::format("num1 = %d, num2 = %.2f, str = %s", num1, num2, str); // 输出字符串:num1 = 123, num2 = 3.14, str = Hello, Arduino! 使用这两种方式,可以在 Arduino 中方便地将 ...
com_port || verbose == VerboseMode::nothing) return; com_port->print(number); } void Commander::print(const float number) { if (!com_port || verbose == VerboseMode::nothing) return; com_port->print((float)number, (int)decimal_places); } void Commander::print(const char *message)...
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、...
const int curtainPin = D1; void setup() { pinMode(curtainPin, OUTPUT); // 其他初始化代码 } void loop() { float thresholdTemperature = 25.0; // 设定温度阈值 if (currentTemperature() > thresholdTemperature) { openCurtains(); } else { closeCurtains(); } delay(60000); // 每分钟检查一...
const String& string, int32_t dX, int32_t poY, uint8_t font)drawCentreString(const char *string, int32_t dX, int32_t poY, uint8_t font)//draw string right justified to dXdrawRightString(const String& string, int32_t dX, int32_t poY, uint8_t font)drawRightString(const char ...
Serial.println(); StaticJsonDocument <256> doc; deserializeJson(doc,payload); // deserializeJson(doc,str); can use string instead of payload const char* sensor = doc["sensor"]; long time = doc["time"]; float latitude = doc["data"][0]; float longitude = doc["dat...
Update toolchain to fix pgm_read_float_unaligned (#8091) Remove include and lib folders removed since 3.0.0 core (#8125) Add errors on invalid/missing function return type (#8165) GNU source: honoring libc requirements (#8147) PlatformIO PIO: use CCFLAGS for -Werror (#8175) (#8092) Docu...
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...
const float log_scale = 64. / log(64. / SCALE_FACTOR + 1.); // Attempts to create an equivalent to SCALE_FACTOR for log function #endif const float coeff = 1. / TIME_FACTOR; // Time smoothing coefficients (used to factor in previous data) ...
/ TIME_FACTOR; // Time smoothing coefficients (used to factor in previous data) const float anti_coeff = (TIME_FACTOR - 1.) / TIME_FACTOR; const unsigned int sampling_period_us = round(1000000 * (2.0 / SAMPLING_FREQUENCY)); // Sampling period (doubled to account for overclock) int8...