Please add a bool ModbusServerTCPasync::isRunning() function to monitor the async TCP server status

[Domenico Silletti]

Please add a function to get the status of the async server.
Something simple like this one I implemented would be very useful.

bool ModbusServerTCPasync::isRunning() {
  if (server) return true;
  else return false;
}

Thank you

[Michael Harwerth]

@bertmelis is reworking the async code ATM and will consider this.

[Bert Melis]

@dsilletti I will add something like that.