ESP32 GPIO 34/ GPIO35 softwareserial problem.

[thienluan]

Dear ESP supporters,

I'm working with ESP32-D2WD. I used several GPIO pins (such as GPIO4) as a SoftwareSerial RX port. It worked very well.

I would like to know why the GPIO34, GPIO35 cannot be used as SoftwareSerial RX ports? Here is the symptom of using GPIO34 as UART RX. It read the first byte well. However, from the second bytes, the read values were wrong.

P/S: The GPIO34, GPIO35 can work well with the HardwareSerial definition but not with the SoftwareSerial. I also attach the SoftwareSerial library with this post.

[martinayotte]

GPIO34 to GPIO39 are "Input Only" ...

[WiFive]

GPIO34 to GPIO39 are "Input Only" ...

He said RX