The Korvo has an usb-serial chip connected to those pins, and that interferes with the signal you're sending. Suggest picking other GPIOs that are not occupied. thanks for your reply. I tried other pins but no change. Also, I prefer to use the available header on the Korvo so if there is a solution...

I am using a esp32-s3-korvo-2. It has tx0 and rx0 pins available on the board. I am trying to use the uart through these pins but Korvo only sends data and doesn't receive anything. I checked the pins using a logic analyzer and I can see the data coming to the rx0. here is the loopback example that ...