Wifi/BLE Paxcounter Project with ESP32 boards

Can someone explain what bytes and port in the PAX counter payload is?

I assume pax is the main data “persons approximately”, wifi the counted WiFi devices and ble the Bluetooth enabled and counted devices. But I struggle with bytes and port and could not find any doc.

      "decoded_payload": {
        "ble": 1,
        "bytes": [
          1,
          0,
          1,
          0
        ],
        "pax": 2,
        "port": 1,
        "wifi": 1
      },