ESP32 Forum

Hi,

According to the IOMUX sheet UART2 Tx -> GPIO16 and UART2 RX -> GPIO17 . But according to the datasheet for ESP-WROVER these pins are not supposed to be used.
I understand that any GPIO can be used and multiplexed. But it is mentioned that for higher frequency signals
It is mentioned for higher frequency signals using the pins specifically designated for U2TX and U2RX (rather than using the GPIO mux to assign any random pins) is recommended.

How do I get the UART2 to work reliably with ESP-WROVER?

Regards

'Higher frequencies' means anything above, say, 20MHz. Unless you want to run your UART at insane breakneck speeds (>20MBaud) you should be able to use the GPIO matrix just fine.

Hi,
Thanks for your reply.

I have facing issues with the stability of UART2 that is why I enquired about the Pins for UARt2
I have posted the issues viewtopic.php?f=13&t=2804
It contains all the results and the code I am using to Read UART2

Regards

HI,

The very Same issue which I have described here has been faced earlier and reported on arduino-esp32 issues
https://github.com/espressif/arduino-es ... -325694606

And it was resolved by using the designated pins for UART2 instead of using the GPIO matrix.

But since Pins 16 and 17 Cannot be used in WROVER we cannot used the designated pins for UART2