char* str = "Hello, world!"; String stringObject; stringObject.assign(str); 除了使用字符串指针和字符串对象之间的转换,还可以使用 Arduino 的内置函数 toCharArray() 将string 转换为字符数组(char[])。 举个例子: highlighter- Arduino String stringObject = "Hello, world!"; char charArray[stringObjec...
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...
5、1.13 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()12.3 int()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 volatile13.4 const十四、辅助工具14.1 size...
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"; String reStr; WiFiClient espClient; PubSubC...
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、辅助工具
array1.add(1); // 往数组里面添加值 array1.add(1.2); // 往数组里面添加值 array1.add(-10); // 往数组里面添加值 // 对象嵌套 JsonObject root = jsonBuffer.createNestedObject("key4"); //添加一个对象节点 root["key1"] = "hello"; ...
#include <ArduinoJson.h>void loop(){ StaticJsonDocument<256> doc; doc["Temperature"] = 22; doc["Humidity"] = 68; doc["Light"] = 96; // Add an array JsonArray data = doc.createNestedArray("data"); data.add(48); data.add(2.3); char out[128]; int b =...
(range:0 - 1023) to int8_t array (range:-128 - 127) summ += data[i]; while (micros() < (microseconds + sampling_period_us)) { // Timing out uC ADC to fulfill sampling frequency requirement } } // Eliminating remaining DC component (produces usable data in FFT bin #0, which ...
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 ...
char input[INPUT_SIZE + 1]; // array of type char (C-string) //read Serial until new line or buffer full or time out byte size = Serial.readBytesUntil('\n', input, INPUT_SIZE); // Add the final 0 to end the C-string