Record HRM and accelerometer events

Record events as they happen via bluetooth or to a file. This app can use BTHRM as a reference.

Steps for usage

(Optional) Install BTHRM as reference (use ECG based sensor for best accuracy).
- Configure BTHRM to "Both"-Mode or use a version >= 0.12. This prevents data beeing lost because BTHRM can replace the HRM-events data with BTHRM data.
Click "Start" in browser.
Wait until the "Events" number starts to grow, that means there are events recorded.
Record for some time, since BTHRM and HRM often need some seconds to start getting useful values. Consider 2000 events a useful minimum.
(Recording to file) Stop the recording with a long press of the button and download log.csv with the Espruino IDE.
(Recording to browser) Click "Stop" followed by "Save" and store the resulting file on your device.