Arduino Library for the ADXL345 accelerometer.

I have tried to create a library for the ADXL345 which is easy to use for people who don't want to deal with all the registers. Therefore I have added lots example sketches which will enable you to deal even with the more complex features such as the FIFO modes. Howerever I still recommend to have a look into the data sheet to get a deeper understanding.

You can use both I2C and SPI. If you want to find out how to use SPI, look at the ADXL345_SPI_basic_data.ino.

A detailed tutorial is available:

https://wolles-elektronikkiste.de/adxl345-teil-1 (German)

https://wolles-elektronikkiste.de/en/adxl345-the-universal-accelerometer-part-1 (English)

If you are not so much experienced with the ADXL345, I recommend to work through the examples in the following order:

1. ADXL345_basic_data
2. ADXL345_SPI_basic_data
3. ADXL345_calibration
4. ADXL345_angles_orientation
5. ADXL345_pitch_roll_corrected_angles
6. ADXL345_sleep
7. ADXL345_free_fall_interrupt
8. ADXL345_data_ready_interrupt
9. ADXL345_activity_inactivity_interrupt
10. ADXL345_auto_sleep.ino
11. ADXL345_single_tap
12. ADXL345_double_tap
13. ADXL345_fifo_fifo
14. ADXL345_fifo_stream
15. ADXL345_fifo_trigger

To develop this library I have worked with a ADXL345 module. It should also work with the bare ADXL345 IC. For the module I have noticed that the power consumption is much higher than mentioned in the data sheet. I think the issue is the voltage converter on the module. You can reduce the power consumption by choosing 3.3 volts instead of 5 volts. At least this worked with my module.

If you like my library please give it a star. If you don't like it I would be happy to get feedback. And if you find bugs I will try to eliminate them as quickly as possible.