“Here We are going to connect Node MCU ESP8266 and RFID- RC522 with MYSQL Database. So for that first we should connect our Node MCU ESP8266 Board with RFID Module. By using the RFID Module we are going to scan our RFID card and tag which are allow or not. And by using our ESP8266 we are going to send that data to our MYSQL Database which is connect through a php page. In this case we are using php script as well. From arduino code we are making a get request to our php page. Make sure that php page you have to put inside /var/www/html.”
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