seeed-studio / seeed_arduino_ads1115

This library comes with ADS1115. The library has an example to get 4 single-ended inputs or 2 differential inputs.

Seeed Arduino ADS1115

Introduction

An Arduino library for ADS1115 Ultra-Small, Low-Power, I2C-Compatible, 860-SPS, 16-Bit ADCs.ADC data can be obtained using IIC interface.

Usage

1.Git clone this resp to your Arduino IDE's libraries directory.
2.Run the demo "comparator" or "differential" or "singleended" on examples directory.
3.More information view code.

---

This software is written for seeed studio and is licensed under The MIT License. Check License.txt for more information.

Contributing to this software is warmly welcomed. You can do this basically by
forking, committing modifications and then pulling requests (follow the links above
for operating guide). Adding change log and your contact into file header is encouraged.
Thanks for your contribution.

Seeed Studio is an open hardware facilitation company based in Shenzhen, China.
Benefiting from local manufacture power and convenient global logistic system,
we integrate resources to serve new era of innovation. Seeed also works with
global distributors and partners to push open hardware movement.

seeed_arduino_ads1115's Issues

Reading speed

Hello! I'm currently experimenting with this library in conjunction with a Seeed Studio XIAO nRF52840 (Sense) board. However, I've observed a low data rate when transmitting data via the serial port. Initially, I suspected that this might be due to the MCU speed, but since it operates at 64MHz, that shouldn't be the issue.

To provide context, I'm using basic Arduino code, and I'm seeing around 20-21 samples per second on the screen. Could this low data rate be attributed to a problem with the delay time conversion within the library?

` #include "ADS1115.h"
float Voltage = 0.0;

#ifdef SOFTWAREWIRE
#include <SoftwareWire.h>
SoftwareWire myWire(3, 2);
ADS1115 ads(myWire);//IIC
#else
#include <Wire.h>
ADS1115 ads(Wire);//IIC
#endif

void setup(void)
{
Serial.begin(115200);
while(!ads.begin(0x48)){
Serial.print("ads1115 init failed!!!");
delay(1000);
}
//ads.begin(0x49)
//ads.begin(0x4A)
//ads.begin(0x4B)

ads.setOperateMode(ADS1115_MODE_SINGLE);   
ads.setOperateStaus(ADS1115_OS_SINGLE);

ads.setPGAGain(ADS1115_PGA_6_144);    // 2/3x gain +/- 6.144V  1 bit =  0.1875mV (default)
// ads.setPGAGain(ADS1115_PGA_4_096); // 1x gain   +/- 4.096V  1 bit =  0.125mV
// ads.setPGAGain(ADS1115_PGA_2_048); // 2x gain   +/- 2.048V  1 bit =  0.0625mV
// ads.setPGAGain(ADS1115_PGA_1_024); // 4x gain   +/- 1.024V  1 bit =  0.03125mV
// ads.setPGAGain(ADS1115_PGA_0_512); // 8x gain   +/- 0.512V  1 bit =  0.015625mV
// ads.setPGAGain(ADS1115_PGA_0_256); // 16x gain  +/- 0.256V  1 bit =  0.0078125mV

//ads.setSampleRate(ADS1115_DR_8); //8 SPS
// ads.setSampleRate(ADS1115_DR_16); //16 SPS
// ads.setSampleRate(ADS1115_DR_32); //32 SPS
// ads.setSampleRate(ADS1115_DR_64); //64 SPS
// ads.setSampleRate(ADS1115_DR_128); //128 SPS
//ads.setSampleRate(ADS1115_DR_250); //250 SPS
// ads.setSampleRate(ADS1115_DR_475); //475 SPS
ads.setSampleRate(ADS1115_DR_860); //860 SPS

}
void loop(void)
{
int16_t adc0,adc1,adc2,adc3;
adc0 = ads.getConversionResults(channel0); //P = AIN0, N = GND
//adc1 = ads.getConversionResults(channel1); //P = AIN1, N = GND
//adc2 = ads.getConversionResults(channel2); //P = AIN2, N = GND
//adc3 = ads.getConversionResults(channel3); //P = AIN3, N = GND
Voltage = (adc0 * 0.1875);

Serial.print("AIN0: "); Serial.print(adc0);
Serial.print("      Voltaje:");Serial.print(Voltage);Serial.println("mV");

//Serial.print("AIN1: "); Serial.println(adc1);
//Serial.print("AIN2: "); Serial.println(adc2);
//Serial.print("AIN3: "); Serial.println(adc3);
//Serial.println(" ");    
//delay(10);

} `

Serial output:

PD: I change between 250, 475 and 860 sps settings and i got the same result