Hi Sachin, Have you connected | Microcontroller › 8051 › RFID BASED TOLLPLAZA › Hi Sachin, Have you connected April 20, 2014 at 11:25 am #11593 SHAH DISHANT H.Participant Hi Sachin, Have you connected pull up resistor on P0? You must connect external pull up with P0. P1, P2 & P3 has internal pull up but P0 does not have it ..!! Try with 4.7k or 10k pull up and test..!!
