disconnect method

@override MqttConnectionState disconnect([ MqttDisconnectMessage? disconnectMessage ])

Disconnects

Implementation

@override
MqttConnectionState disconnect([MqttDisconnectMessage? disconnectMessage]) {
  MqttLogger.log('MqttConnectionHandlerBase::disconnect');
  if (connectionStatus.state == MqttConnectionState.connected) {
    // Send a disconnect message to the broker
    if (disconnectMessage == null) {
      sendMessage(
        MqttDisconnectMessage().withReasonCode(
          MqttDisconnectReasonCode.normalDisconnection,
        ),
      );
    } else {
      sendMessage(disconnectMessage);
    }
  }
  // Disconnect
  _performConnectionDisconnect();
  return connectionStatus.state;
}