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  1. Hi, I solved this problem and I will answer here if it can help someone. The problem is that the RFID module crosses RX and TX (DTE device) as can be seen from the scheme in my previous post. This makes that TX from the RFID module is connected to T1OUT and RX to R2IN in pmod rs232 (see this). The solution was to swap RX and TX in the RS232 side, i.e., before connecting to the pmod rs232. It took me two days full time to figure this out...bear always in mind that this pmod rs232 module is configured in DCE mode! Regards.
  2. Hi everybody, I have an RFID module which can be controlled through an RS232 communication. I have tested it with a rs-232 connection with a PC and with an also with an usb-serial converter. I can connect with the RFID module an receive its data through a terminal emulator such as Teraterm, PuTTY, etc. The data are simply ASCII strings of codes. The module can also be configured by sending some ASCII commands, this is also tested. Now I want to do the same with a microcontroller (Arduino, Lopy, etc.), i.e., the microcontroller would act as the PC, getting data from the RFID reader. I