How to Use Seeed Grove 3-Axis Digital Accelerometer (±16g): Examples, Pinouts, and Specs

The Seeed Grove 3-Axis Digital Accelerometer (±16g) (Manufacturer Part ID: 101020054) is a compact and versatile sensor designed to measure acceleration in three dimensions: X, Y, and Z. With a measurement range of ±16g, this accelerometer is ideal for detecting motion, orientation, and vibration in a variety of applications. It is part of the Grove ecosystem, which simplifies prototyping and development with its plug-and-play modular design.

• Motion detection and gesture recognition
• Orientation sensing for robotics and drones
• Vibration monitoring in industrial systems
• Wearable devices and fitness trackers
• Gaming and virtual reality controllers

The following table outlines the key technical details of the Seeed Grove 3-Axis Digital Accelerometer:

The Grove connector on the accelerometer module has four pins. The table below describes each pin:

1. Hardware Setup:

   • Connect the Grove 3-Axis Digital Accelerometer to an I2C port on a Grove Base Shield or Grove-compatible board.
   • If using an Arduino UNO, attach the Grove Base Shield to the Arduino UNO and connect the accelerometer to an available I2C port.

2. Software Setup:

   • Install the required library for the accelerometer. The sensor is based on the LIS3DHTR chip, so you can use the Seeed_LIS3DHTR library.
   • Open the Arduino IDE and install the library via the Library Manager:
     • Go to Sketch > Include Library > Manage Libraries.
     • Search for Seeed_LIS3DHTR and click Install.

The following Arduino code demonstrates how to read acceleration data from the sensor:

#include <Wire.h>
#include "LIS3DHTR.h" // Include the library for the LIS3DHTR chip

LIS3DHTR<TwoWire> LIS; // Create an instance of the LIS3DHTR class

void setup() {
  Serial.begin(9600); // Initialize serial communication
  Wire.begin();       // Initialize I2C communication

  // Initialize the accelerometer
  if (!LIS.begin(Wire, 0x19)) { // Default I2C address is 0x19
    Serial.println("Failed to initialize accelerometer!");
    while (1); // Halt execution if initialization fails
  }

  LIS.setOutputDataRate(LIS3DHTR_DATARATE_50HZ); // Set data rate to 50Hz
  LIS.setFullScaleRange(LIS3DHTR_RANGE_16G);    // Set measurement range to ±16g
  Serial.println("Accelerometer initialized successfully!");
}

void loop() {
  // Read acceleration values for X, Y, and Z axes
  float x = LIS.getAccelerationX();
  float y = LIS.getAccelerationY();
  float z = LIS.getAccelerationZ();

  // Print the acceleration values to the Serial Monitor
  Serial.print("X: ");
  Serial.print(x, 2); // Print X-axis acceleration with 2 decimal places
  Serial.print(" g, Y: ");
  Serial.print(y, 2); // Print Y-axis acceleration with 2 decimal places
  Serial.print(" g, Z: ");
  Serial.print(z, 2); // Print Z-axis acceleration with 2 decimal places
  Serial.println(" g");

  delay(100); // Delay for 100ms before the next reading
}

• Ensure the sensor is securely connected to the I2C port to avoid communication errors.
• The sensor operates at both 3.3V and 5V, but ensure your microcontroller's I2C lines are compatible with the chosen voltage.
• Avoid exposing the sensor to extreme temperatures or mechanical shocks beyond its specified limits.

1. No Data Output:

   • Ensure the Grove connector is properly seated in the I2C port.
   • Verify that the correct I2C address (default: 0x19) is being used in the code.

2. Incorrect or Unstable Readings:

   • Check for loose connections or damaged cables.
   • Ensure the sensor is not exposed to excessive vibrations or noise during operation.

3. Library Not Found:

   • Confirm that the Seeed_LIS3DHTR library is installed in the Arduino IDE.
   • Restart the Arduino IDE after installing the library.

Q: Can I use this sensor with a Raspberry Pi?
A: Yes, the sensor supports I2C communication and can be used with a Raspberry Pi. You will need to configure the I2C interface on the Raspberry Pi and use a compatible Python library, such as smbus.

Q: What is the maximum sampling rate of the sensor?
A: The sensor supports a maximum output data rate of 5.3 kHz, but for most applications, lower rates (e.g., 50Hz or 100Hz) are sufficient.

Q: How do I change the measurement range?
A: Use the setFullScaleRange() function in the code to set the desired range. Supported ranges are ±2g, ±4g, ±8g, and ±16g.

Q: Can I use multiple accelerometers on the same I2C bus?
A: Yes, but you will need to configure each sensor with a unique I2C address. Refer to the sensor's datasheet for instructions on changing the address.

This concludes the documentation for the Seeed Grove 3-Axis Digital Accelerometer (±16g). For further assistance, refer to the official Seeed Studio documentation or community forums.