Serial port pins for SparkFun ESP32 DMX to LED Shield and Adafruit ESP32-S3 TFT Feather

Development Boards ESP32
1

I’m trying to get Example1-DMXOutput.ino from the Sparkfun DMX library to work with a Adafruit ESP32-S3 TFT Feather on the SparkFun ESP32 DMX to LED Shield.
https://github.com/sparkfun/SparkFunDMX/tree/master/examples/Example1-DMXOutput

I think the enPin = 39 and the UART TX pin is 5 and RX is pin 6 on CPU on the Feather.
Schematic for AdaFruit Feather https://cdn-learn.adafruit.com/assets/assets/000/114/104/original/adafruit_products_FS3TFT_sch.png?1660251030
It appears that:
pin 39 (TXD0) on the ESP32-S3 is connected to JP1-pin 1 (JP1-16 on shield schematic)
pin 5 (TX) on the ESP32-S3 is connected to JP1-pin 2 (JP1-14 on shield schematic)
pin 6 (TX) on the ESP32-S3 is connected to JP1-pin 3 (JP1-15 on shield schematic)
https://cdn.sparkfun.com/assets/c/1/c/c/d/SparkFun_ESP32_Thing_Plus_DMX_to_LED_Shield.pdf

So I don’t know how to tell the Sparkfun DMX library to use these pins. The example code just has HardwareSerial dmxSerial(2);
i did change uint8_t enPin = 21; to uint8_t enPin = 39; in the example code, but it still does not seem to be outputting DMX.

2

In setup(), explicitly assign the correct TX and RX pins before calling begin():

void setup() {
    Serial.begin(115200);
    pinMode(enPin, OUTPUT);
    digitalWrite(enPin, HIGH); // Enable DMX output

    // Initialize DMX UART2 with custom TX and RX pins
    dmxSerial.begin(250000, SERIAL_8N2, 6, 5); // RX=6, TX=5

    DMX::Initialize(&dmxSerial, enPin);
}