Chat here is you are connecting ESP-xx type modules to existing AVR based Arduino

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By MartinBrauer86
#95246 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!
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By MartinBrauer86
#95249
rooppoorali wrote:According to this thread https://arduino.stackexchange.com/quest ... fid-reader the setup may disfunction due to power shortage.

Thank you for the help, i try it with a buck converter to directly give 3.3V to the reader from the 12V source.