uint64_t number; unsigned long long1 = (unsigned long)((number & 0xFFFF0000) >> 16 ); unsigned long long2 = (unsigned long)((number & 0x0000FFFF)); String hex = String(long1, HEX) + String(long2, HEX); // six octets
void drawPixel(uint16_t x, uint16_t y, uint16_t color);绘制线 你也可以画一条线,指定起点和终点和颜色:void drawLine(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t color);对于水平或垂直的线,有优化的线绘制功能,避免角计算:...
}//esp_err_t uart_set_line_inverse(uart_port_t uart_num, uint32_t inverse_mask)uart_set_line_inverse(1, UART_SIGNAL_RTS_INV);//特殊,修改输出或输入的通信电信号正负逻辑//Certain versions of Arduino core don't define MODE_RS485_HALF_DUPLEX and so fail to compile.//By using UART_MOD...
write() 往文件里写数据 file.write(“hello world”); size_t File::write(const uint8_t *buf, size_t size) read() 从文件里读数据 size = file.read(buf, 10); size_t File::read(uint8_t* buf, size_t size) mkdir() 创建目录 fs.mkdir(“/”); bool FS::mkdir(const String &path...
h>#include <WiFiClient.h>ESP8266WiFiMulti WiFiMulti;void setup() { Serial.begin(115200); // Serial.setDebugOutput(true); Serial.println(); Serial.println(); Serial.println(); for (uint8_t t = 4; t > 0; t--) { Serial.printf("[SETUP] WAIT %d...\n", t); Se...
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) ...
uint8_t pin = count%4; // ping-pong string selection so displayed string is not modified. uint8_t n = count%2; str[n] = "ADC" + String(pin) + ": " + analogRead(pin) + ", "; // Should check for error. Return of false indicates error. ...
virtual uint16_t Color_To_565(uint8_t r, uint8_t g, uint8_t b)=0; virtual void Draw_Pixe(int16_t x, int16_t y, uint16_t color)=0; virtual void Fill_Rect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color)=0; ...
/*TEST autogain code*/ constintsampleWindow = 50;// Sample window width in mS (50 mS = 20Hz) unsignedintsample; uint8_t volume = 0; /*///*/ //long deltas[3] = { 5, 6, 7 }; longrgb[3];
Serial.print("Connecting to MQTT... "); uint8_t retries = 3; // 连接mqtt服务器 while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected Serial.println(mqtt.connectErrorString(ret)); Serial.println("Retrying MQTT connection in 5 seconds..."); ...