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I checked my boards using an arduino and the firmware version is 0x92, I tried all communication from 1200 up to 115200 but got no response, I also measured the EA pin ( when not connected to 3V3) and it seems to be floating because I see 50 Hz hum on my oscilloscope.I soldered a wire to the EA pin and connected it to GND, also that did not solve the issue.Can you tell me where did you buy your boards, and also what is the text on the chip, than I may be able to buy the right one for my project.
hello Boomer48 thanks for your quick reply, my board has an extra text between the IC and the antenna, HW-126, so it is not exactly the same as yours.Also the IC has only a pin 1 mark and no other text like NXP RC522 xx xx TXD 7270 as would be expected.I think it is a clone IC I found this link https://github.com/miguelbalboa/rfid/issues/428
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Raspberry Pi Class