Idahowalker:
The ESP32 has 2 pin matrix ports Port 0 or A and Port 1 or B.
After seeing this#define SERIAL_CNTRL_TO_LCD_RXPIN 34
#define PIN_READ_FLAG 33
#define PIN_WRITE_FLAG 32
For starters. It becomes reasonable that serial issues could develop with the use of PORT B as serial inputs. Port A and Port B have different characteristics. Might be a good idea to understand the differences. see ESP32 API https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/index.html.
thanks, but I didn't see any warning about changing the pin to this location in Espressif documentation (nor different behavior).
The 'right' side of the ESP32 Dev kit is not available for me due to the width of the kit on the breadboard. So UART0 & 2 are not accessible on the GPIO 1/3/17/16.
I tried the U1RX (GPIO9) and U1TX (GPIO10) with no more succes.