#include <stdio.h>
#include "driver/uart.h"
#include<string.h>

void setup() {
    // Configure UART communication
    uart_config_t uart_config = {
        .baud_rate = 115200,
        .data_bits = UART_DATA_8_BITS,
        .parity    = UART_PARITY_DISABLE,
        .stop_bits = UART_STOP_BITS_1,
        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
    };
    uart_param_config(UART_NUM_0, &uart_config);
    uart_set_pin(UART_NUM_0, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
    uart_driver_install(UART_NUM_0, 256, 0, 0, NULL, 0);

    char *data = "Hello, UART!\n";
    uart_write_bytes(UART_NUM_0, (const char*)data, strlen(data));
    
    char rx_data[128] = "";     
    int rx_len = 0; 
    // Send and receive data
    while (1) {
        uart_write_bytes(UART_NUM_0, (const char*)rx_data, strlen(rx_data));
        rx_len = uart_read_bytes(UART_NUM_0,(uint8_t*)rx_data, 100, 20 / portTICK_RATE_MS);
         if (rx_len > 0) {
            rx_data[rx_len] = '\0';  // Null-terminate the received data
            printf("Received: %s", rx_data);  
        }
       // uart_flush(UART_NUM_0);
    }
         //   strcpy(data,rx_data);
}
    
void loop ()
{

}