ESP32 Forum

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#include <hardwareserial.h>
HardwareSerial Seriala(1);
HardwareSerial Serialb(2);

void setup() 
{
  Seriala.begin(9600,SERIAL_8N1,13,12);
  Serialb.begin(4800,SERIAL_8N1,10,11);
}


void loop() 
{
  Seriala.println("hello 1");
  Serialb.println("hello 2");
  delay(100);   
}

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void setup() {
  Serial0.begin(115200);
  Serial.begin(9600);
  Serial1.begin(115200);
}

void loop() {
  if (HWCDCSerial) Serial.println("Testing USB");
  Serial0.println("Testing UART0");
  Serial1.println("Testing UART1");
  delay(1000);
}

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#include "driver/uart.h"

// ESP32S2 usb cdc on boot on, usb dfu on boot off, upload mode internal usb.

const int VEBUS_RXD1=13, VEBUS_TXD1=12;  
const int VEBUS_RXD2=10, VEBUS_TXD2=11;  

const int UART_USED1 = 0; //UART_NUM_1; // serial1
const int UART_USED2 = 1; // serial2

const int LED = 15;

esp_err_t err11,err12,err13,err21,err22,err23;

void setup() 
{
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);
  Serial.begin(115200);
  delay(5000);
  Serial.println("Start");

  uart_config_t uart_config1 = 
  {
        .baud_rate = 9600,
        .data_bits = UART_DATA_8_BITS,
        .parity = UART_PARITY_EVEN,
        .stop_bits = UART_STOP_BITS_1,
        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE, 
        .rx_flow_ctrl_thresh = 32,
  };
  err11 = uart_driver_install(UART_USED1, 256, 256, 0, NULL, 0);
  err12 = uart_param_config(UART_USED1, &uart_config1);   
  err13 = uart_set_pin(UART_USED1, VEBUS_TXD1, VEBUS_RXD1, -1, -1);

  Serial.println(err11);
  Serial.println(err12);
  Serial.println(err13);
  
  uart_config_t uart_config2 = 
  {
        .baud_rate = 9600,
        .data_bits = UART_DATA_8_BITS,
        .parity = UART_PARITY_EVEN,
        .stop_bits = UART_STOP_BITS_1,
        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE, 
        .rx_flow_ctrl_thresh = 32,
  };
  err21 = uart_driver_install(UART_USED2, 256, 256, 0, NULL, 0);
  err22 = uart_param_config(UART_USED2, &uart_config2);   
  err23 = uart_set_pin(UART_USED2, VEBUS_TXD2, VEBUS_RXD2, -1, -1);
  
  Serial.println(err21);
  Serial.println(err22);
  Serial.println(err23);

  Serial.println("Done");
}

char buf1[3] = { 0xaF, 0x00, 0x55 };
char buf2[3] = { 0xa0, 0xFF, 0x55 };

void loop() 
{
  uart_write_bytes(UART_USED1, buf1, 3);
  buf1[2]++;
  uart_write_bytes(UART_USED2, buf2, 3);
  buf2[2]++;
  delay(100);   
  digitalWrite(LED, !digitalRead(LED));  
}

Code: Select all

Start
0
0
0
0
0
0
Done