code: public function batchDeviceSummary($timestamp, $pageIndex)
      {
          $params = [
              'date' => $timestamp,
              'page_index' => $pageIndex,
          ];
  
          return $this->parseJSON('json', [self::API_DEVICE_LIST, $params]);
      }
docs: Fetch all devices statistics data by date.
  
  @param int $timestamp
  @param int $pageIndex
  
  @return \EasyWeChat\Support\Collection