流光

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https://github.com/liu2guang/LittlevGL2RTT/blob/9f149f6406985c97bf11e33e1219346ea834d0ea/littlevgl2rtt.c#L368

In the state machine of `rws_socket_work_th_func`, it will try to send data in idle state (through the `rws_socket_idle_send` function). Within this function, it will eventually call the `rws_socket_send` function. But...