ESP8266 with Rc522 RFID reader wifi problem

Dear Commmunity!
i just configured an ESP8266 on WemosD1R2 board with an RC522 RFID reader. The board is connected to a WPA2 Enterprise wifi. I noticed that the wlan connection is weak, the httpclient cannot connect most of the time. I tried to ping the device, and got a lot of loss, every second ping was lost. After disconnected the RFID-s 3v3 pin, the wlan connection is fast, and zero ping loss. The RFID reader works fine when its connected. The connection is based on this tutorial: https://diyi0t.com/rfid-sensor-tutorial-for-arduino-and-esp8266/. Anybody else got wlan problems when RFID is connected? Thank you!
i just configured an ESP8266 on WemosD1R2 board with an RC522 RFID reader. The board is connected to a WPA2 Enterprise wifi. I noticed that the wlan connection is weak, the httpclient cannot connect most of the time. I tried to ping the device, and got a lot of loss, every second ping was lost. After disconnected the RFID-s 3v3 pin, the wlan connection is fast, and zero ping loss. The RFID reader works fine when its connected. The connection is based on this tutorial: https://diyi0t.com/rfid-sensor-tutorial-for-arduino-and-esp8266/. Anybody else got wlan problems when RFID is connected? Thank you!