//i2C用ライブラリー
#include <Wire.h>

//i2Cアドレス
#define ADS1115_ADDR 0x48

//ASS1115用
#define ASD1115_CONVERSION 0x00   //  to "conversion"
#define ASD1115_CONFIG 0x01       //  0x01  to "config"
#define ASD1115_CONFREGHi 0xC3    //  0xc3  OS=1,MUX=1nn,PGA=001(x1),MODE=1(single)
#define ASD1115_CONFREGLo 0xE3    //  0xe3  DR=111(860SPS),00011(no comparator)
int Channel;
int avrg; //平均数
int values[4][10];
int avval[4];
float dca[4]; //DC電流


void setup() {
  Serial.begin(115200);
  Wire.begin(2,0);       //PinNo=SDA,SCL   D4=SDA,D3=SCL に設定  ESP-12E
  
//■ADS1115　
  ADS1115_request(Channel);
  avrg = 0;
  Channel=0;

  delay(1000);

}

void loop() {
 //■ADS1115
    //  read out the result
  values[Channel][avrg] = ADS1115_answer();
  //  trigger next conversion
  Channel = (Channel + 1) % 4;    //  0,1,2,3,0,1,2,3...
  ADS1115_request(Channel);
  //  delay (minimum 0.3ms)
  delay(10);
  //  output to monitor
  if (Channel == 0) {      
    for (int i1=0; i1<= 3 ; i1++){
      avval[i1]=0;
      for(int i2=0; i2<=9 ; i2++){
        avval[i1] = avval[i1] + values[i1][i2]; 
      }
      avval[i1] = avval[i1]/10;
    }
    avrg = (avrg + 1) % 10;  // 0,1,2,3,4,5,6,7,8,9,0,1...

    Serial.print(" A0="); Serial.print(avval[0],DEC);
    Serial.print(", A1="); Serial.print(avval[1],DEC);
    Serial.print(", A2="); Serial.print(avval[2],DEC);
    Serial.print(", A3="); Serial.print(avval[3],DEC);
    Serial.println("");
   
  }
}


//############################
//
//   　　　サブルーチン
//
//############################
//  triger conversion on An
void ADS1115_request(int n) {
  //  trigger conversion
  Wire.beginTransmission(ADS1115_ADDR);
  Wire.write(ASD1115_CONFIG);
  Wire.write(ASD1115_CONFREGHi | (n << 4));
  Wire.write(ASD1115_CONFREGLo);
  Wire.endTransmission();
}
//  read conversion result
int ADS1115_answer() {
  short int value;
  //  read out the result
  Wire.beginTransmission(ADS1115_ADDR);
  Wire.write(ASD1115_CONVERSION);
  Wire.endTransmission();
  Wire.requestFrom(ADS1115_ADDR, 2);  //  read out 2 bytes
  value = Wire.read() << 8;  value |= Wire.read();
  return value ;              //  0V=0, 4.096V=32,768 return
 }