First some background. I am working on a project for my water polo club where I am making a time system. This consists of two shot clocks (30s countdown timers that can be paused and reset at eill) and a main clock which counts down 7mins for each quarter and can be paused.

I have made one standalone shot clock and this was my first Arduino project, but at this point I feel pretty conformable with what I am doing.

My issue is that I cannot think of and haven't found a way through research, a system what would very accurately synchronize the two shot clocks to display the same time.

I was thinking of using the main clock as a base station and sending wifi packets to each shot clock so they act like slaves, but I worry about latency. I also need to deal with range, 25m is the length of the pool.

Thanks.

 

First some background. I am working on a project for my water polo club where I am making a time system. This consists of two shot clocks (30s countdown timers that can be paused and reset at eill) and a main clock which counts down 7mins for each quarter and can be paused.

I have made one standalone shot clock and this was my first Arduino project, but at this point I feel pretty conformable with what I am doing.

My issue is that I cannot think of and haven't found a way through research, a system what would very accurately synchronize the two shot clocks to display the same time.

I was thinking of using the main clock as a base station and sending wifi packets to each shot clock so they act like slaves, but I worry about latency. I also need to deal with range, 25m is the length of the pool.

Thanks.

How much latency can you tolerate? There is latency when the single unit updates the display. And when the light reaches your eyes from the display. But we tolerate that because it is simply to minuscule to worry about.

I would think that as long as your code is well written and the packets small enough you will never be able to detect a difference. And there are much easier ways to communicate via RF than wifi. Maybe even faster.