docs: def get_qrcode(self, product_id=1):
          """
          获取deviceid和二维码
          详情请参考
          https://iot.weixin.qq.com/wiki/new/index.html?page=3-4-4
  
          :param product_id: 设备的产品编号
          :return: 返回的 JSON 数据包
          """
          if product_id == '1' or product_id == 1:
              params = None
          else:
              params = {'product_id': product_id}
  
          return self._get('getqrcode', params=params)