script to try out ads1115 differential

ads1115_differential.ino

// ads1115_differential.ino 
// PURPOSE: read differential
// EDITED BY: JFS 03/26/21
//  AUTHOR: Rob.Tillaart
// VERSION: 0.1.1
// test 1

// +signal on AIN0, -signal on AIN1
//EXAMPLE OUTPUT
// val_01: -16 LSB -0.125 mV       -15.6 W/m2
// val_01: 0 LSB   0.000 mV        0.0 W/m2
// val_01: -16 LSB -0.125 mV       -15.6 W/m2
// val_01: -16 LSB -0.125 mV       -15.6 W/m2
// val_01: -16 LSB -0.125 mV       -15.6 W/m2
// val_01: -16 LSB -0.125 mV       -15.6 W/m2
// val_01: -32 LSB -0.250 mV       -31.3 W/m2
// val_01: 0 LSB   0.000 mV        0.0 W/m2
// val_01: -32 LSB -0.250 mV       -31.3 W/m2

#include <SPI.h>
#include <ADS1X15.h>
#define ADS1115_addr 0x48 
 
ADS1115 ADS(ADS1115_addr);

void setup()
{
  Serial.begin(115200);
  Serial.println(__FILE__);
  Serial.print("ADS1X15_LIB_VERSION: ");
  Serial.println(ADS1X15_LIB_VERSION);
  ADS.begin();
  ADS.setGain(16);
}

void loop()
{
  int16_t val_01 = ADS.readADC_Differential_0_1(); // +DIFF signal on CHAN1, -DIFF signal on CHAN2

  float millivolts_01 = ADS.toVoltage(val_01) * 1000;
  float netradGain = 8.0;             // uV/W/m2
  float netradsf = 1000 / netradGain; // mV to W/m2
  float wm2 = millivolts_01 * netradsf;
  Serial.print("val_01: ");
  Serial.print(val_01);
  Serial.print(" LSB\t");
  Serial.print(millivolts_01, 3);
  Serial.print(" mV\t");
  Serial.print(wm2, 1);
  Serial.print(" W/m2\t");
  Serial.println();
  delay(1000);
}

// -- END OF FILE --