ESP32 S3 UART Problem

[temraire]

Hi everyone,

I have an issue about uart communication. I have two esp32 these are esp32-devkit-c_v4(esp32-wroom-32d) and ESP32-DevKitS-V1(esp32-s3-wroom-1).

I want to send data from esp32-wroom-32d(uart0) to esp32-s3(uart1) via uart but i can't it.

I can't read data with uart1 as follow but when i use uart0 it is working.
How can i use uart1 for reading data.

Thanks,




[Pins]
esp32-wroom-32d --> esp32-s3
Tx(pin_uart0_tx) ------------- Rx(pin_uart1_rx_gpio_18)
Rx(pin_uart0_rx) ------------- Tx(pin_uart1_tx_gpio_17)


::Codes::
::ESP32-WROOM-32D::

Code: [Select all] [Expand/Collapse]

1. #include <stdio.h>
2. #include <stdlib.h>
3. #include <string.h>
4. #include "driver/uart.h"
5.  
6. #include "freertos/freeRTOS.h"
7. #include "freertos/task.h"
8.  
9. void app_main(void)
10. {
11.     printf("Started ... \n");
12.  
13.     int bufferSize = 250;
14.     uart_port_t port = UART_NUM_0;
15.     QueueHandle_t queue;
16.  
17.     uart_config_t uartConfig = {
18.         .baud_rate = 115200,
19.         .data_bits = UART_DATA_8_BITS,
20.         .parity = UART_PARITY_DISABLE,
21.         .stop_bits = UART_STOP_BITS_1,
22.         .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
23.     };
24.  
25.  
26.     uart_param_config(port, &uartConfig);
27.     uart_driver_install(port, bufferSize, bufferSize, 10, &queue, 0);
28.  
29.     //TX - RX - RTS - CTS
30.     uart_set_pin(port, 1, 3, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
31.  
32.    
33.    
34.     while(true){
35.        
36.         char *t = "Test message!\n";
37.         uart_write_bytes(port, t, strlen(t));
38.  
39.         vTaskDelay(pdMS_TO_TICKS(5000));
40.     }
41.    
42. }

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::ESP32-S3::

Code: [Select all] [Expand/Collapse]

1. #include <stdio.h>
2. #include "freertos/FreeRTOS.h"
3. #include "freertos/task.h"
4. #include "driver/uart.h"
5.  
6.  
7. static void echo_task(void *arg)
8. {
9.  
10.     int bufferSize = 250;
11.     uart_port_t port = UART_NUM_1;
12.     QueueHandle_t queue;
13.  
14.     uart_config_t uartConfig = {
15.         .baud_rate = 115200,
16.         .data_bits = UART_DATA_8_BITS,
17.         .parity = UART_PARITY_DISABLE,
18.         .stop_bits = UART_STOP_BITS_1,
19.         .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
20.     };
21.  
22.  
23.     uart_param_config(port, &uartConfig);
24.  
25.     //TX - RX - RTS - CTS
26.     uart_set_pin(port, 17, 18, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
27.  
28.     uart_driver_install(port, bufferSize-1, bufferSize, 10, &queue, 0);
29.  
30.  
31.     // Configure a temporary buffer for the incoming data
32.     uint8_t *data = (uint8_t *) malloc(bufferSize);
33.  
34.     while (1) {
35.         // Read data from the UART
36.  
37.         size_t len = 0;
38.         uart_get_buffered_data_len(port, &len);
39.  
40.         uart_read_bytes(port, data, 1024, pdMS_TO_TICKS(1000));
41.         printf("%d\n",len);
42.         if(len > 0){
43.             printf("%s\n", (char*)data);
44.         }
45.  
46.         vTaskDelay(pdMS_TO_TICKS(3000));
47.     }
48. }
49.  
50. void app_main(void)
51. {
52.     printf("Started... \n");
53.  
54.     xTaskCreate(echo_task, "uart_echo_task", 4096, NULL, 10, NULL);
55. }

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[ESP_LJH]

Could you do not use UART0 to communicate, it is connected to a serial chip, then serial chip may affect the communication.
You could try to 1) use anther GPIO pair as UART 2) replace UART0 series resistor ( 0 ohm ) with 500 ~ 1K.