I would like to reopen the issue. Encountered this again.

[khryssmar]

          I would like to reopen the issue. Encountered this again. Please fix. @SuGlider 

Originally posted by @khryssmar in #9500 (comment)

[lbernstone]

Please fill out the issue details. This looks like it is still correct in 2.0.17 and v2.x branch. The change in v3.0 is intentional.

[Jason2866]

Which issue in general? Some defaults are changed for Core 3.0.x as designed.
Since UART IOs can freely assigned to nearly any GPIO just change as you want.

[SuGlider]

@khryssmar - this is intentional and it is documented in https://docs.espressif.com/projects/arduino-esp32/en/latest/migration_guides/2.x_to_3.0.html#id14

In case that the sketch needs to use other pins, Serial1 and Serial2 can change their pins by using Serial1.begin(baud_rate, mode, rxPin, txPin) or by Serial2.setPins(rxPin, txPin).
Setting the pin to -1 will force it to keep the default or to keep it unchanged.
Example: Serial2.setPins(-1, 17); will only change the TX2 pin to 17.

The problem with the former ESP32 Serial2 pins is that those are used to control the PSRAM within the ESP32-WROVER module. In case that the sketch uses PSRAM, it would crash its execution.

[SuGlider]

For the records:

This pins change is valid for Arduino Core 3.x.x. But it was commited by mistake into 2.0.15 -- 2.0.17.
Explanation in #10152 (comment)

---

Arduino Core 2.0.15, 2.0.16 and 2.0.17 had a mistake using new pins.
Arduino Core 2.0.14 and lower use the original pins.

Arduino Core from release/v2.x branch uses the same pins as before:
Fixed with #9502

[SuGlider]

Arduino Core branch release/v2.x will continue to receive new contributions as usual.
But it is very improbable that we will release a 2.0.18 version.

It is possible to create a sketchbook board from a cloned branch, like release/v2.x
For that, please follow the instructions from
https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html#windows-manual-installation