Hello! I do not know English well and write via google translator. Thank you in advance! I need to connect arduino to rfid reader. The reader has an output rs232 there are only three wires that are connected to 2, 3, 5 pins. I bought TTL rs232 for arduino. connected rs232 to arduino: GND - GND…

RS232 TTL does not send data

hammy November 11, 2021, 5:44pm 3

Poking wires into connectors is doomed to failure too , wire up correctly !

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