Chronomètres de ligne

Description

In order to function, your phone must be paired with the Bluetooth module dedicated to timing per revolution (the name of the Bluetooth device: chrligne) or Bluetooth modules dedicated to the timing between two lines (bluetooth chrstart chrstop modules, one for the line start and one for the finish line).
The application receives information from the modules indicating that their line has been crossed and starts a timer of which the result is displayed or after a second pass of the line (in the case of turn clock), after the passage of the line module chrstop (if the line clock).

to build the Arduino Bluetooth module, take a look at the files on the app fritzing of deposit:
https://bitbucket.org/cmogentale/chrono_arduino_android