float 转 string 速度慢

clarkbao

各位大神好，float 转 string，有什么更快速的吗
s1 = String(f) + "V"; 这一行代码，让主循环从每秒17万次降到了5000次。

以下是代码

unsigned long kk = 0;
unsigned long LCDRefreshTime = 0;
String s1 = "";
void setup() {
  // put your setup code here, to run once:
  kk = 0;
  Serial.begin(9600);
  LCDRefreshTime = millis();
}

void loop() {
  // put your main code here, to run repeatedly:
  kk++;
  float f = 123.4567;
  unsigned long currentMillis = millis();
  unsigned long detal = 0;
    if(currentMillis >= LCDRefreshTime){
      detal = currentMillis - LCDRefreshTime;
    }else{
      detal = ~LCDRefreshTime + currentMillis - 1;
    }
    s1 = String(f) + "V";
    if(detal > 1000)
    {
      Serial.println(kk);
      
      LCDRefreshTime = currentMillis;
    }
}

之后

之前

sangshu

那直接转换为int存到，取余存到字符数组中。试试