#define TX_PIN 5  // Try GPIO5
#define RX_PIN 4  // Try GPIO4

void setup() {
    Serial.begin(115200);       // USB Serial for debugging
    Serial1.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN);  // UART communication
}

void loop() {
    if (Serial1.available()) {
        String receivedData = Serial1.readStringUntil('\n'); // Read incoming data
        Serial.print("Received: ");
        Serial.println(receivedData);
    }
}