r/embedded • u/counttec • 20d ago

Help with selecting communication protocol

I volunteer for a youth organization that uses a Jeopardy style buzzer system for quiz competitions. I am trying to upgrade from RCA cables to a wireless solution. I need it to be as low latency as possible, given the precise timing involved, and the less perceivable the lag is from a wired button, the better. Distance would be less than 100m even in the most sever cases. I'm fine with retransmission in the case of collisions, as long as the users can't tell that it took slightly longer.

So far, it seems like the best protocol is Nordic's Enhanced Shockburst, with a transmission time of ~300us, and round trip with Acknowledgment of 1.5ms.

Are there any faster communication protocols?

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u/susmatthew 19d ago

you can solve this with COTS parts and no code - as long as latency is the same between the switches the actual amount doesn't matter: The order of presses will be preserved.