I am trying to read a MIFARE card with MFRC522 shield to open an access door with arduino 2009. Also I have connected an Ethernet shield to detect clients that want to open the access door with an http request and also power on a light. Later on, each event (MIFARE card and/or HTTP request) should be sent to a server.
Now if I put a card near the MFRC522 it open the access door (very good !!!) but ethernet shield doesn’t accept http request even if answer to ping request.
If I disconnect MFRC522 shield pins, the HTTP request work fine, I can open access door and power on light.
What I am doing wrong ???
digixit.ino (5.58 KB)