It took me a while to figure out this one, hoping someone can help me out. I have a RDM6300 rfid reader which uses 3 wires. GND - TX - 5volt. Because this unit doesnt have an option enable or disable reading to stop reading rfid tags, most of the code on the internet suggests that you use pin D2 fo…

RFID reader reboots Mega 2560 when using 12v power supply

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