Description

DF Robot ADS1115 16 Bit A/D Module

The DF Robot I2C ADS1115 16-bit ADC module can accurately collect and convert analog signals. Through this ADC module, a Raspberry Pi can easily use a wide range of Gravity series analog sensors to measure various signals, and perceive this world. DFRobot I2C ADS1115 16-bit ADC module is specially designed for Raspberry Pi and Gravity series analog sensors, which greatly reduces the difficulty of using the Gravity series analog sensors, plug and play, no soldering, thus making it very convenient to use.

This module uses 16-bit ADC chip ADS1115, supports 3.3 ~ 5V wide voltage power supply. The chip has a precision reference voltage and programmable gain adjustment (PGA), therefore, accurate acquisition and conversion can be performed for both weak and highly variable signals . So it is also applicable to all types of applications that the main control board needs to accurately collect the analog signals.

Quick Spec

Supply Voltage: 3.3 ~ 5V
Analog Signal Detection Range: 0 ~ VCC
Number of Analog Channels: 4
ADC Bits: 16 Bit
Operating Current: 2 ~ 3mA
Interface Type: Gravity I2C
Interface Level: High 3.3V, Low 0V
Dimensions: 32 x 32mm
Net Weight: 15g

Pinout

Pin Number	Label	Description
\	VCC	Power VCC (3.3 ~ 5V)
-	GND	Power GND (0V)
C	SCL	I2C Bus Clock Line
D	SDA	I2C Bus Data Line
A	Analog In	Analog Input Channels: A0, A1, A2, A3
ADDR	I2C Address	I2C address selection switch,I2C address: 0x48, 0x4

Wiring Diagram

Raspberry Pi

Arduino

Sample Code



/*
 * file ADS1115_ReadVoltage.ino
 * @ https://github.com/DFRobot/DFRobot_ADS1115
 * connect ADS1115 I2C interface with your board (please reference board compatibility)
 * The voltage value read by A0 A1 A2 A3 is printed through the serial port.
 * Copyright   [DFRobot](https://www.dfrobot.com), 2016
 * Copyright   GNU Lesser General Public License
 * version  V1.0
 * date  2018-01-21
 */

#include <Wire.h>
#include <DFRobot_ADS1115.h>

DFRobot_ADS1115 ads;

void setup(void)
{
    Serial.begin(115200);
    ads.setAddr_ADS1115(ADS1115_IIC_ADDRESS0);   // 0x48
    ads.setGain(eGAIN_TWOTHIRDS);   // 2/3x gain
    ads.setMode(eMODE_SINGLE);       // single-shot mode
    ads.setRate(eRATE_128);          // 128SPS (default)
    ads.setOSMode(eOSMODE_SINGLE);   // Set to start a single-conversion
    ads.init();
}

void loop(void)
{
    if (ads.checkADS1115())
    {
        int16_t adc0, adc1, adc2, adc3;
        adc0 = ads.readVoltage(0);
        Serial.print("A0:");
        Serial.print(adc0);
        Serial.print("mV,  ");
        adc1 = ads.readVoltage(1);
        Serial.print("A1:");
        Serial.print(adc1);
        Serial.print("mV,  ");
        adc2 = ads.readVoltage(2);
        Serial.print("A2:");
        Serial.print(adc2);
        Serial.print("mV,  ");
        adc3 = ads.readVoltage(3);
        Serial.print("A3:");
        Serial.print(adc3);
        Serial.println("mV");
    }
    else
    {
        Serial.println("ADS1115 Disconnected!");
    }

    delay(1000);
}