TelnetStream.flush(); does nothing on esp32 about telnetstream HOT 5 CLOSED

esp32 doesn't have true client.flush(). client.flush clears the receive buffer there.

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One of the code examples actually says no clear in the title. Have a look at that.

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espressif/arduino-esp32#8871

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Thanks for the answers!
I understand that the wifi flush is not a flush but a clear which throws away the buffer.
Ok, but is there a way to implement a real "flush : Output whatever is in the queue/buffer via the device or port" ?
I'm using TelnetStream to log/debug several xtasks. A mutex to protect a flush does the job nicely for the Serial port : no messages are mixed.
I'm going to implement a short delay to make sure, as much as possible, that the wifi buffer is flushed....but this is ugly. Anyway better way? Check if the buffer is empty? how?

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I don't know

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