I have start to work with the esp8266. At present I use a WMOS D1 mini and have connected a TFT Display via Spi. Now I have left the ports D0,D2,D3,D4 and D8. I have try to set them as a Input port but it did not work. I have try as low or high Input with and without pullup or pulldown resistors. Can I not use this ports or make I a mistake?