go-adxl345

Go package for ADXL345 sensor

Basic Usage

package main

import (
	"log"

	"github.com/devligue/go-adxl345"
)

func main() {
	adxl, err := adxl345.NewADXL345(
		1,                  // i2c interface index
		adxl345.AddressDef, // i2c address
	)
	if err != nil {
		log.Fatal(err)
	}
	defer adxl.Close()

	axes, err := adxl.GetAxesG()
	if err != nil {
		log.Println("Failed to get axes data [G].", err)
	}
	axes.Print()

	axes, err = adxl.GetAxesMS2()
	if err != nil {
		log.Println("Failed to get axes data [m/s^2].", err)
	}
	axes.Print()
}

Documentation

You can find it at godoc.org. Look!

Tips

Configuring I2C on Raspberry Pi

I2C on Raspberry Pi is not turned on by default. Use raspi-config to enable it.

• Run sudo raspi-config
• Use the down arrow to select Advanced Options.
• Arrow down to I2C.
• Select yes when it asks you to enable I2C.
• Also select yes if it asks about automatically loading the kernel module.
• Use the right arrow to select the <Finish> button.
• Select yes when asked to reboot.

Finding your device I2C interface index

If your device is at /dev/i2c-1 then you should use index 1. As simple as that.

Finding your device I2C address

If you don't have it already, install i2c-tools with your package manager. Then after connecting your device run:

i2cdetect -y 1

Result should be self explanatory.

In the case of ADXL345, it usually has two addresses available. Depending on the manufacturer and/or model the default address and alternative address might be switched but one of them will most probably be 0x53 and the other 0x1D. Changing the address is achieved by pulling SDO pin HIGH or LOW. Look into your sensors datasheet for details.

Compatibility

Tested with ADXL345 GY-291