Change esp32 build over to event-based ASIO #162
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ASIO on ESP32 uses `select()` internally to implement `poll_one()`. Polling with a 100 microsecond interval was wasting a lot of CPU. This leverages `select()` for a more event-based approach.
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ASIO on ESP32 uses
select()internally to implementpoll_one(). Polling with a 100 microsecond interval was wasting a lot of CPU. This leveragesselect()for a more event-based approach.Fixes #161