Manuel

Hello, I'm working with 4 readers and it works ok, It's based on miguelbalboa's multi rfid example > bool getRFID(byte readern) > { > bool isPICCpresent = false; > digitalWrite(RST_PIN,...

Here is the .ino, this is a test setup, I have a more complex program comparing UIDs, storing it to eeprom, activating outputs and many others functions but the base...

You shoul use 3.3v for the RFID readers, you could lower the UNO from 5v to 3.3v or use level shifters. Other than that is to have the connections right...

Yes, you have to use 3.3v to Vcc for every RC522. All the communication bus (MOSI, MISO and SCK) and select (SSn) should also work at 3.3v. Maybe you have...

Mine are from China too and maybe any problem to recognize some rfid tags but all work in the system. Now I have 6 readers working fine. I use an...

Of course, using RST pin you use the same SS pin for all readers. This is as I have configured. I suppose that cut the supply line or using the...

Yes, the way as I use RST is as you said: digitalWrite(RSTpin, LOW) when sensing digitalWrite(RSTpin, HIGH) when off I think our sketches should very similar because the concept of...