//
//    FILE: ADS_differential.ino
//  AUTHOR: Rob.Tillaart
// VERSION: 0.1.1
// PURPOSE: read differential
//

// test 1
// connect 2 potmeters in series
//
// GND ---[   x   ]------[   y   ]---- 5V
//            |              |
//
// measure at x and y  (connect to AIN0 and AIN1). 
// x should be lower or equal to y

// test 2
// connect 2 potmeters parallel
//
// GND ---[   x   ]------ 5V
//            |
//
// GND ---[   y   ]------ 5V
//            |
//
// measure at x and y  (connect to AIN0 and AIN1).
// range from -VDD .. +VDD are possible


#include <ADS1X15.h>

ADS1115 ADS(0x48);


void setup() 
{
  Serial.begin(115200);
  Serial.println(__FILE__);
  Serial.print("ADS1X15_LIB_VERSION: ");
  Serial.println(ADS1X15_LIB_VERSION);

  ADS.begin();
  ADS.setGain(0);
}


void loop() 
{
  int16_t val_01 = ADS.readADC_Differential_0_1();  
  int16_t val_03 = ADS.readADC_Differential_0_3();  
  int16_t val_13 = ADS.readADC_Differential_1_3();  
  int16_t val_23 = ADS.readADC_Differential_2_3(); 
  float volts_01 = ADS.toVoltage(val_01); 
  float volts_03 = ADS.toVoltage(val_03); 
  float volts_13 = ADS.toVoltage(val_13); 
  float volts_23 = ADS.toVoltage(val_23); 

  Serial.print("\tval_01: "); Serial.print(val_01); Serial.print("\t"); Serial.println(volts_01, 3);
  Serial.print("\tval_03: "); Serial.print(val_03); Serial.print("\t"); Serial.println(volts_03, 3);
  Serial.print("\tval_13: "); Serial.print(val_13); Serial.print("\t"); Serial.println(volts_13, 3);
  Serial.print("\tval_23: "); Serial.print(val_23); Serial.print("\t"); Serial.println(volts_23, 3);
  Serial.println();

  delay(1000);
}


// -- END OF FILE --