Sure hope this is the right forum... I have put together a sketch where I use two RFID readers, an RTC module and three leds to simulate locks. Sketch is working fine, and all looks ok.
The RC522 RFID reader has an on-board led that is ligting up red when powered. I have prowled the internet looking for how to control that led, to make it green when access is granted etc. I have found nothing. I have however seen videos on youtube, and pictures around the net where this led is green, so I know it is possible ;).
Hello again,
After my inspection of my board (SPI), I am pretty sure the on board LED (labeled D1) is mono chromatic (=red only)
On the other way, according the RC522 documentation, this led lights-up with the power.
I do not think it is possible to mange it.
There are different "modes", and maybe it is possible to control it this way.
