isAlive method

void isAlive()

Implementation

void isAlive() {
  heartbeatTimer = Timer.periodic(Duration(seconds: 20), (timer) {
    var sendData = {
      'service': "connection",
      'functionName': "isAlive",
      'data': {
        '_heartBeat': true,
      }
    };
    load(sendData);
  });
}