Gravity: 0-10V 15-Bit Dual-Channel High-Precision ADC Module for Arduino / Raspberry Pi / ESP32 (แท้ DFRobot)

Introduction

The Gravity: 0-10V 15-Bit High-Precision ADC Module combines dual-channel 0-10V input with I2C and UART interfaces, offering unmatched flexibility for Arduino, Raspberry Pi, and ESP32 users. Featuring 15-bit resolution (0.3125mV accuracy) and the Texas Instruments ADS1115 chip, it bridges industrial 0-10V sensors (e.g., pressure transducers, energy meters) with low-voltage microcontrollers. Perfect for automation, environmental monitoring, and IoT systems requiring stable, noise-resistant signal conversion.

Industrial-Grade 0-10V Sensor Compatibility

The module directly interfaces with industrial-standard 0-10V sensors, such as pressure transducers, flow meters, and wind speed sensors. It resolves the voltage mismatch between high-output sensors (0-10V) and low-voltage microcontrollers (e.g., Arduino, Raspberry Pi), eliminating the need for external signal conditioning.

15-bit Resolution with Enhanced Accuracy

With a 15-bit ADC and ±2mV precision, the module captures subtle signal variations (e.g., 0.3125mV steps), making it suitable for applications requiring fine-grained data, such as water tank pressure monitoring or energy consumption analysis. The ADS1115’s PGA dynamically adjusts gain to maintain accuracy across the full 0-10V range.

Flexible Communication Interfaces

Dual I2C and UART protocols ensure compatibility with diverse controllers, from Arduino boards to industrial PLCs. The Gravity-4P connector standardizes wiring, reducing setup complexity for multi-sensor systems.

Applications

• Industrial Automation: Real-time monitoring of pressure, flow rate, and temperature in manufacturing pipelines.
• Environmental Monitoring: Precise measurement of water quality parameters, wind speed, and humidity in outdoor stations.
• Energy Management: Tracking voltage signals from energy meters or solar inverters for consumption analysis.

Specification

• Chip: ADS1115
• Input Range: 0-10V
• Resolution: 15-bit (0.3125mV)
• Accuracy: ±2mV
• Communication: I2C/UART
• Supply Voltage: 3.3-5V DC

Documents

• Product wiki
• Accuracy Test Record
• Schematic
• 2D CAD
• 2D DXF
• 3D STP

Shipping List

• Gravity ADC Module ×1
• Gravity-4P I2C/UART Cable ×1

Function Diagram

Dimension Diagram

Serial Communication Description

Factory Parameters

• Device Address: 0x00CC
• Baud Rate: 9600bps

Command Table:

Reading Channel 1 Voltage Data via Serial Port

Host sends: 0xCC 0x20 0x01 0x01 //Select module device address and channel

Then send: 0xBB 0x31 0x03 //Read channel 1 voltage value

Serial AT Command Description

The following figure will show the voltage values of channel 1 and channel 2 read using AT commands respectively.

Note: If a command not listed in the table is used, it will return: ERROR

Arduino Usage Tutorial

Hardware and Software Preparation

• Hardware
  • Aduino UNO Controller x1
  • Gravity: 2-Channel 15Bit 0-10V ADC Module x1
• Software
  • Arduino IDE Click to download Arduino IDE
  • Download and install DFRobot_ADS1115 Library.

Reading Data Using I2C

Wiring Diagram

Sample Code

• Connect the module to the UNO controller according to the wiring diagram above. Of course, you can also use an expansion board for a more convenient and quicker prototype construction.
• Switch the sensor's selection switch to the I2C side.
• Download and install DFRobot_ADS1115 Library.
• Open the Arduino IDE, upload the following code to the UNO controller.
• Open the serial monitor of the Arduino IDE, adjust the baud rate to 9600, and observe the serial print results.

Note: Switch off the power when switching the toggle switch

#include <DFRobot_ADS1115_0_10V.h>

#define MODULE_I2C_ADDRESS 0x4A
DFRobot_ADS1115_I2C ads1115(&Wire, MODULE_I2C_ADDRESS);

void setup() {
Serial.begin(9600);
while (!ads1115.begin()) { delay(1000); }
}

void loop() {
double data;
data= ads1115.get_value(1); // Channel 1
Serial.print(data);
Serial.println("mv");
delay(1000);
}

Results

Open the serial monitor to get the voltage value input from channel 1.

Reading Data Using UART

Wiring Diagram

Sample Code

• Connect the module to the UNO controller according to the wiring diagram above. Of course, you can also use an expansion board for a more convenient and quicker prototype construction.
• Switch the sensor's selection switch to the UART side.
• Download and install DFRobot_ADS1115 Library.
• Open the Arduino IDE, upload the following code to the UNO controller.
• Open the serial monitor of the Arduino IDE, adjust the baud rate to 9600, and observe the serial print results.

Note: Switch off the power when switching the toggle switch

#include <DFRobot_ADS1115_0_10V.h>
#include <SoftwareSerial.h>

SoftwareSerial mySerial1(4, 5); // Set the RX and TX pins of the software serial port
DFRobot_ADS1115_UART ads1115(&mySerial1);

void setup() {
Serial.begin(9600);
mySerial1.begin(9600);
while (!ads1115.begin())
{
delay(1000);
}
}

void loop() {
double data;
data= ads1115.get_value(1); // Channel 1
Serial.print(data);
Serial.println("mv");
delay(1000);
}

Results

Open the serial monitor to get the voltage value input from channel 1.