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我想为我的项目使用 ACS712 库或默认计算（ACS712-30A），首先，我得到 45-60 范围内的数据，没有任何连接，为了显示设备当前使用情况，我想更改 Neopixels 颜色，但是当我想这样做时，我的数据起点在没有任何连接的情况下变为 200。

连接引脚：

  • ACS712 数据：A0
  • NeoPixel LED RGB 环形数据：D6

我的代码：

#include <Adafruit_NeoPixel.h>
#include "ACS712.h"


#define PIN 6 // On Trinket or Gemma, suggest changing this to 1
#define NUMPIXELS 16 // Popular NeoPixel ring size
#define DELAYVAL 300 // Time (in milliseconds) to pause between pixels

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
ACS712  ACS(A0, 5.0, 1023, 66);


const int analogIn = A0;
int mVperAmp = 185; // use 100 for 20A Module and 66 for 30A Module
int RawValue = 0;
int ACSoffset = 2500;
double Voltage = 0;
double Amps = 0;


long randNum = 2600;
unsigned long startMillis;



void setup() {
  Serial.begin(9600);
pinMode(A0,INPUT);
  ACS.autoMidPoint();

  startMillis = millis();

  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
  pixels.clear(); // Set all pixel colors to 'off'

  pinMode(2, OUTPUT);

cyan();

}

void loop() {
  int mA = ACS.mA_AC();
  if ((millis() - startMillis) >= 5000) {
    if(mA < 480){
    Serial.println(0);
    }else{
     float mW = (mA *0.22);
    Serial.println(mW);

    }
    startMillis = millis();
    //LED RGB
     if(mA <480){
        cyan();    // cyan
 }else if(mA <= 1000 && mA >= 480){
        green();    // Green
}else if (mA >1000 && mA <=6000){
        yellow();    // Yellow
}
  }
    delay(100);
}

void cyan(){
   pixels.setPixelColor(0, pixels.Color(  0, 250,   150));
  pixels.setPixelColor(1, pixels.Color(  0, 250,   150));
   pixels.setPixelColor(2, pixels.Color(  0, 250,   150));
    pixels.setPixelColor(3, pixels.Color(  0, 250,   150));
     pixels.setPixelColor(4, pixels.Color(  0, 250,   150));
      pixels.setPixelColor(5, pixels.Color(  0, 250,   150));
       pixels.setPixelColor(6, pixels.Color(  0, 250,   150));
        pixels.setPixelColor(7, pixels.Color(  0, 250,   150));
         pixels.setPixelColor(8, pixels.Color(  0, 250,   150));
          pixels.setPixelColor(9, pixels.Color(  0, 250,   150));
           pixels.setPixelColor(10, pixels.Color(  0, 250,   150));
            pixels.setPixelColor(11, pixels.Color(  0, 250,   150));
             pixels.setPixelColor(12, pixels.Color(  0, 250,   150));
              pixels.setPixelColor(13, pixels.Color(  0, 250,   150));
               pixels.setPixelColor(14, pixels.Color(  0, 250,   150));
                pixels.setPixelColor(15, pixels.Color(  0, 250,   150));
                pixels.show();
}
void green(){
   pixels.setPixelColor(0, pixels.Color(  0, 155,   0));
  pixels.setPixelColor(1, pixels.Color(  0, 155,   0));
   pixels.setPixelColor(2, pixels.Color(  0, 155,   0));
    pixels.setPixelColor(3,pixels.Color(  0, 155,   0));
     pixels.setPixelColor(4, pixels.Color(  0, 155,   0));
      pixels.setPixelColor(5, pixels.Color(  0, 155,   0));
       pixels.setPixelColor(6, pixels.Color(  0, 155,   0));
        pixels.setPixelColor(7, pixels.Color(  0, 155,   0));
         pixels.setPixelColor(8, pixels.Color(  0, 155,  0));
          pixels.setPixelColor(9, pixels.Color(  0, 155,  0));
           pixels.setPixelColor(10, pixels.Color(  0, 155,  0));
            pixels.setPixelColor(11, pixels.Color(  0, 155,  0));
             pixels.setPixelColor(12, pixels.Color(  0, 155,  0));
              pixels.setPixelColor(13, pixels.Color(  0, 155,  0));
               pixels.setPixelColor(14, pixels.Color(  0, 155,  0));
                pixels.setPixelColor(15, pixels.Color(  0, 155,  0));
                pixels.show();

}
void yellow(){
     pixels.setPixelColor(0, pixels.Color(  255, 155,   0));
  pixels.setPixelColor(1, pixels.Color(  255, 155,   0));
   pixels.setPixelColor(2, pixels.Color(  255, 155,   0));
    pixels.setPixelColor(3,pixels.Color(  255, 155,   0));
     pixels.setPixelColor(4, pixels.Color(  255, 155,   0));
      pixels.setPixelColor(5, pixels.Color(  255, 155,   0));
       pixels.setPixelColor(6, pixels.Color(  255, 155,   0));
        pixels.setPixelColor(7, pixels.Color(  255, 155,   0));
         pixels.setPixelColor(8, pixels.Color(  255, 155,  0));
          pixels.setPixelColor(9, pixels.Color(  255, 155,  0));
           pixels.setPixelColor(10, pixels.Color(  255, 155,  0));
            pixels.setPixelColor(11, pixels.Color(  255, 155,  0));
             pixels.setPixelColor(12, pixels.Color(  255, 155,  0));
              pixels.setPixelColor(13, pixels.Color(  255, 155,  0));
               pixels.setPixelColor(14, pixels.Color(  255, 155,  0));
                pixels.setPixelColor(15, pixels.Color(  255, 155,  0));
                pixels.show();
}
//void colorWipe(uint32_t color, int wait) {
// 
//  for(int i=0; i<16; i++) { // For each pixel in strip...
//    pixels.setPixelColor(i, color);         //  Set pixel's color (in RAM)
//    pixels.show();                          //  Update strip to match
//    delay(wait);                           //  Pause for a moment
//  }
//}

我知道有些方法在代码重用方面非常糟糕，但我们只是想测试一下什么时候只打开一个 LED，它实际上是正确的。当我们只使用一个 LED 时，我们的数据范围在没有任何连接的情况下达到 90-100。

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