getConnectionStatusStream method
Returns a broadcast stream that emits true when the printer is
connected and false when it is not.
The native side checks the connection every 60 seconds using the
~HS (Health Status) ZPL command.
Implementation
Stream<bool> getConnectionStatusStream() {
return _connectionStreamChannel
.receiveBroadcastStream()
.map<bool>((dynamic event) => event as bool);
}