I managed to install 1 rfid reader following this link tutorial but i have no idea how to read with 2 and know from which one reads

  • As you can see from my PN532 and RC522 experiments, if you use Rpi4B buster. python3 You can have more than one, up to 5 SPI/I2C channels. One problem is that if you are using python 2.7 lthiery/SPI-Py: github.com/lthiery/SPI-Py, then because SPI-Py is not compatible to the standard buster pre-installed SPI, and usually hard coded to only channel 0.0. It might be very messy to play with multiple SPI channels. PN532 can do SPI, I2C and also UART, so you have a lot of choices to do multiple RFID/NFC readers.
    – tlfong01
    May 24, 2020 at 6:26
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    I've watch all the links but i don't understant them... Surly they did it some way but I don't manage to see how. Sorry, I'm noob with this!
    – ikenas
    May 24, 2020 at 8:34
  • Hi @Vasyl Yovdiy, Thank you for your feedback. I am not surprised that you don't understand my RFID/NFC experiments. Let me explain. (1) MFRC522 and PN532 RFID/NFC are "advanced" level subjects which require prerequisite knowledge and skills, such as SPI, I2C and OOP (Object Oriented Programming). To make our discussion simple, let us focus on SPI MFRC522 (becasue they are simpler than I2C PN532). (2) You may like to first read the long, 14 days chat record of my first referenced answer. / to continue, ...
    – tlfong01
    May 24, 2020 at 9:28
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    I will check them. Thank you for you time, post the answer if you wish and I will mark it as solved
    – ikenas
    May 24, 2020 at 10:30


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