Connecting the BMA180 accelerometer (Arduino Nano BMA180 accelerometer HM-10 Bluetooth module).
https://usefulmobileapps.com/en/bluetooth-accelerometer.php https://itunes.apple.com/us/app/vibration-analysis/id817385888.
https://usefulmobileapps.com/en/bluetooth-accelerometer.php https://itunes.apple.com/us/app/vibration-analysis/id817385888.