Ethernet Shield สองตัวนี้แท้ไหมครับ
https://www.arduinoall.com/product/56/ethernet-shield-w5100-r3-support-mega-uno-support-for-arduino
https://www.arduinoall.com/product/33/ethernet-shield-w5100-%E0%B8%AA%E0%B8%B3%E0%B8%AB%E0%B8%A3%E0%B8%B1%E0%B8%9A-arduino-uno-mega1280-2560-%E0%B8%9E%E0%B8%A3%E0%B9%89%E0%B8%AD%E0%B8%A1%E0%B8%8A%E0%B9%88%E0%B8%AD%E0%B8%87-sd-card