Hello guys,
I buyed a ADS1115 module to use with my Wemos D1 Mini, but I have a problem. I only connect SDA, SCL, 3V, GND and ADDR. None input to AX is connected and MicroUSB is used to power and program the unit.
I used the example library code from Adafruit, but I always get values and not zero or a stable low value.
This my code and the console output.
Thanks for your help.
#include <Adafruit_ADS1X15.h>
//Adafruit_ADS1115 ads; /* Use this for the 16-bit version */
Adafruit_ADS1015 ads; /* Use this for the 12-bit version */
void setup(void)
{
Serial.begin(115200);
Serial.println("Hello!");
Serial.println("Getting single-ended readings from AIN0..3");
Serial.println("ADC Range: +/- 6.144V (1 bit = 3mV/ADS1015, 0.1875mV/ADS1115)");
// The ADC input range (or gain) can be changed via the following
// functions, but be careful never to exceed VDD +0.3V max, or to
// exceed the upper and lower limits if you adjust the input range!
// Setting these values incorrectly may destroy your ADC!
// ADS1015 ADS1115
// ------- -------
// ads.setGain(GAIN_TWOTHIRDS); // 2/3x gain +/- 6.144V 1 bit = 3mV 0.1875mV (default)
// ads.setGain(GAIN_ONE); // 1x gain +/- 4.096V 1 bit = 2mV 0.125mV
// ads.setGain(GAIN_TWO); // 2x gain +/- 2.048V 1 bit = 1mV 0.0625mV
// ads.setGain(GAIN_FOUR); // 4x gain +/- 1.024V 1 bit = 0.5mV 0.03125mV
// ads.setGain(GAIN_EIGHT); // 8x gain +/- 0.512V 1 bit = 0.25mV 0.015625mV
ads.setGain(GAIN_SIXTEEN); // 16x gain +/- 0.256V 1 bit = 0.125mV 0.0078125mV
ads.begin();
}
void loop(void)
{
int16_t adc0, adc1, adc2, adc3;
float volts0, volts1, volts2, volts3;
adc0 = ads.readADC_SingleEnded(0);
adc1 = ads.readADC_SingleEnded(1);
adc2 = ads.readADC_SingleEnded(2);
adc3 = ads.readADC_SingleEnded(3);
volts0 = ads.computeVolts(adc0);
volts1 = ads.computeVolts(adc1);
volts2 = ads.computeVolts(adc2);
volts3 = ads.computeVolts(adc3);
Serial.println("-----------------------------------------------------------");
Serial.print("AIN0: "); Serial.print(adc0); Serial.print(" "); Serial.print(volts0); Serial.println("V");
Serial.print("AIN1: "); Serial.print(adc1); Serial.print(" "); Serial.print(volts1); Serial.println("V");
Serial.print("AIN2: "); Serial.print(adc2); Serial.print(" "); Serial.print(volts2); Serial.println("V");
Serial.print("AIN3: "); Serial.print(adc3); Serial.print(" "); Serial.print(volts3); Serial.println("V");
delay(1000);
}
Console output
AIN0: 46 0.01V
AIN1: 46 0.01V
AIN2: 47 0.01V
AIN3: 131 0.02V
-----------------------------------------------------------
AIN0: 209 0.03V
AIN1: 168 0.02V
AIN2: 166 0.02V
AIN3: 80 0.01V
-----------------------------------------------------------
AIN0: 46 0.01V
AIN1: 46 0.01V
AIN2: 47 0.01V
AIN3: 87 0.01V
-----------------------------------------------------------
AIN0: 47 0.01V
AIN1: 87 0.01V
AIN2: 128 0.02V
AIN3: 128 0.02V
-----------------------------------------------------------
AIN0: 86 0.01V
AIN1: 86 0.01V
AIN2: 47 0.01V
AIN3: 47 0.01V
-----------------------------------------------------------
AIN0: 46 0.01V
AIN1: 46 0.01V
AIN2: 47 0.01V
AIN3: 129 0.02V