HardwareSerial.end() not cleaning up pins

[dka23]

Reopening issue #3205. This issue is still present in the current version (as seen in Tasmota). It seems to be fixable by calling gpio_reset_pin(pinNumber).

See also comment by @WayneKeenan in #3205 (comment)_

[lbernstone]

#3894

[dka23]

Thanks @lbernstone - closing this as duplicate.