Arduino interfacing with ADS1115 for high resolution analog measurement

 

To interface with the ADS1115 ADC and print data on an LCD using Arduino, you will need to do the following:

1. Connect the ADS1115 to the Arduino using the I2C protocol. Connect the SDA and SCL pins of the ADS1115 to the corresponding pins on the Arduino (A4 and A5, respectively).

2. Connect the LCD to the Arduino using the appropriate pins. This can vary depending on the specific LCD you are using, but typically involves connecting the LCD's data pins (D4-D7) to digital pins on the Arduino and connecting the RS, E, and RW pins to other digital pins.

3. Include the necessary libraries in your Arduino sketch. You will need the Wire library for I2C communication and the LiquidCrystal library for controlling the LCD.

4. In your sketch, initialize the ADS1115 and the LCD. This will involve setting up the I2C communication and configuring the ADC and the LCD for your specific needs.

5. Continuously read the data from the ADS1115 and display it on the LCD. You can use the ADS1115 library to read the data from the ADC, and the LiquidCrystal library to write the data to the LCD.

Here's some example code to get you started:

#include <Wire.h> #include <Adafruit_ADS1015.h> #include <LiquidCrystal.h> #define ADS1115_ADDRESS 0x48 Adafruit_ADS1115 ads(ADS1115_ADDRESS); #define LCD_RS 12 #define LCD_EN 11 #define LCD_D4 5 #define LCD_D5 4 #define LCD_D6 3 #define LCD_D7 2 LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7); void setup() { Wire.begin(); ads.begin(); lcd.begin(16, 2); } void loop() { int16_t adc0, adc1, adc2, adc3; adc0 = ads.readADC_SingleEnded(0); adc1 = ads.readADC_SingleEnded(1); adc2 = ads.readADC_SingleEnded(2); adc3 = ads.readADC_SingleEnded(3); lcd.clear(); lcd.setCursor(0, 0); lcd.print("ADC0: "); lcd.print(adc0); lcd.setCursor(0, 1); lcd.print("ADC1: "); lcd.print(adc1); delay(500); }

This code initializes the ADS1115 and the LCD in the setup() function, and continuously reads the data from the ADC and displays it on the LCD in the loop() function. The ADC data is read using the readADC_SingleEnded() function, and the data is written to the LCD using the print() function of the LiquidCrystal library. You can modify this code to suit your specific needs, such as changing the ADC channels that are read, or adding additional LCD displays.

#include <Wire.h> #include <Adafruit_ADS1015.h> #include <LiquidCrystal.h> #define ADS1115_ADDRESS 0x48 Adafruit_ADS1115 ads(ADS1115_ADDRESS); #define LCD_RS 12 #define LCD_EN 11 #define LCD_D4 5 #define LCD_D5 4 #define LCD_D6 3 #define LCD_D7 2 LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7); void setup() { Serial.begin(9600); Wire.begin(); ads.begin(); lcd.begin(16, 2); } void loop() { int16_t adc0, adc1, adc2, adc3; adc0 = ads.readADC_SingleEnded(0); adc1 = ads.readADC_SingleEnded(1); adc2 = ads.readADC_SingleEnded(2); adc3 = ads.readADC_SingleEnded(3); lcd.clear(); lcd.setCursor(0, 0); lcd.print("ADC0: "); lcd.print(adc0); lcd.setCursor(0, 1); lcd.print("ADC1: "); lcd.print(adc1); Serial.print("ADC0: "); Serial.println(adc0); Serial.print("ADC1: "); Serial.println(adc1); delay(500); }

This code adds the Serial.begin() function to initialize serial communication at a baud rate of 9600. In the loop() function, the ADC data is read and displayed on the LCD as before, but it is also sent over serial using the Serial.print() and Serial.println() functions. This allows you to monitor the ADC data in real-time using a serial monitor, such as the one built into the Arduino IDE. To view the serial output, open the serial monitor in the Arduino IDE and set the baud rate to 9600.