Pings regularly, not in blocking receive wait?

[programmin1]

This is a very handy library... but what if I want to listen, as in the example

while ($message = yield $connection->receive()) { ...

but also ping every x seconds even if there was nothing received?
A websocket might need regular pings to stay active.

[Niklas Keller]

Pings are automatically sent, or so you want to send a message instead of a websocket ping?