What is it?
- A huge stopwatch with two big red control buttons (start and stop)
- Mainly intended for measuring time on an obstacle course
How does it work?
- Each button and the display contain a radio module (RFM69)
- Button presses are send to the display which calculates the time
Further features
- USB charging of the integrated LiPo batteries
- Retransmissions with time compensation if a radio packet gets lost
- Simple highscore management