ESP32 Forum

Hi,

I want use UAR0 for LOGs and UART1 for other comms in Esp32S3. Uart1 will be connected to GPIO0 (TX) and GPIO1 (RX), the code looks something like this:

#include "driver/uart.h"
#include "esp_log.h"

#define UART_COMM_NUM UART_NUM_1
#define UART_COMM_TXD 0
#define UART_COMM_RXD 1
#define UART_COMM_BAUDRATE 115200
#define UART_COMM_BUF_SIZE 1024

void app_main(void)
{
// Configure UART1 parameters
uart_config_t uart_config = {
.baud_rate = UART_COMM_BAUDRATE,
.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_COMM_NUM, &uart_config);

// Set UART1 pins: TX=GPIO0, RX=GPIO1
uart_set_pin(UART_COMM_NUM, UART_COMM_TXD, UART_COMM_RXD, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);

// Install UART1 driver
uart_driver_install(UART_COMM_NUM, UART_COMM_BUF_SIZE, UART_COMM_BUF_SIZE, 0, NULL, 0);

// Example: Send a message over UART1
const char* test_str = "Hello from UART1!\r\n";
uart_write_bytes(UART_COMM_NUM, test_str, strlen(test_str));

// UART0 will continue to output logs as usual
ESP_LOGI("UART", "UART0 is used for logs, UART1 is used for communication on GPIO0/1");
}


The point is: I see the LOG coming out at GPIO0, 1, what is happening?

Ideally I would like to see the LOG showing up in a USB C connector (the same that I use for programming the ESP32S3)
and the other UART communication (UART1) in GPIO0,1, but looks like there is some conflict between UART0 and 1, is that possible?

Here is official example.

https://github.com/espressif/esp-idf/tr ... _rxtxtasks

GPIO is specified in menuconfig.

My bad, UART0 in my board was not connected to GPIO 0,1 but default GPIOs 43, 44
Thanks for the hint.