No data on Serial Monitor from UHF RFID (R16-7DB) via RS232 to TTL on ESP32

Projects Interfacing w/ Software on the Computer
1

Hi! It's been days that I'm trying to figure out to connect a UHF RFID reader (R16-7DB) to my ESP32 using an RS232 to TTL converter (MX3232). I'm using GPIO16 (RX2) of the ESP32 for reading, and I’ve connected:

  • VCC of the converter to 3.3V of ESP32
  • GND to GND
  • TXD of the converter to GPIO16

The reader blinks when reading, but I’m not seeing any data on the serial monitor, and I assure that baud rates are correct. Also I only got this output when I click the en button:
19:50:44.581 -> rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
19:50:44.581 -> configsip: 0, SPIWP:0xee
19:50:44.581 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
19:50:44.626 -> mode:DIO, clock div:1
19:50:44.626 -> load:0x3fff0030,len:4888
19:50:44.626 -> load:0x40078000,len:16516
19:50:44.626 -> load:0x40080400,len:4
19:50:44.626 -> load:0x40080404,len:3476
19:50:44.626 -> entry 0x400805b4
19:50:44.737 -> ESP32 RFID Reader Test (Read Only)
19:50:44.737 -> 0x00

Any ideas why this happens or what I might be missing? Im beginner on this so your responses are much appreciated, Thanks in advance!

R16-7DB UHF RFID
R16-7DB UHF RFID1920×1080 41.1 KB

2

Are you sure of that? Converter is just translator, not serial device. If I needed to guess, I would connect RX to RX. Does the pin have some arrow for direction printed?

3

Are those messages correct? Do they indicate an error? Is your unknown program actually reading something that tells you a tag has been read?

Does your tag reader function when using the PC sample program?