ESP32 Forum

Hello,

Im currently trying to build a simple plc with an esp32-s3.

There i want to integrate a RS485 interface but i have a few questions.

What is the logic level of the uart of the esp? 5V or 3.3V?

And does anyone of you have an idea if i should do a half or full duplex rs485?

Thanks in advance

ESP32 GPIO is all 3.3V. Technically, RS485 is always half-duplex; if you want full-duplex you'd probably use RS422.

thanks for the answer

i found and ordered the correct board now.
But since this board uses UART and i wanna connect as much IO as possible, there is another question.

The Dev-Kit of the ESP32-S3 has 2 micro USB ports.
So to save some IO pins i thought i could use one of those for my RS485 Board.
Is this possible or just stupid?

I just know that i need one micro usb to flash my programs to the ESP, for communicating over the serial monitor and maybe for debugging. So because both can do that, is there really a use for both of them or is there something i am missing?
Can i use both for these things?