/*
*******************************************************************************
* Copyright (c) 2021 by M5Stack
*                  Equipped with M5Core2 sample source code
*                          配套  M5Core2 示例源代码
* Visit for more information: https://docs.m5stack.com/en/core/core2
* 获取更多资料请访问: https://docs.m5stack.com/zh_CN/core/core2
*
* Describe: MultSerial.  多串口
* Date: 2021/8/5
******************************************************************************
*/
#include <M5Core2.h>

void setup() {
  M5.begin();  //Init M5Core2.  初始化 M5Core2
  // Serial2.begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t txPin, bool invert)
  Serial2.begin(115200, SERIAL_8N1, 13, 14);  //Init serial port 2.  初始化串口2
}

void loop() {
  if (Serial.available()) {  //If the serial port reads data.  如果串口读到数据
    int ch =
        Serial
            .read();  // Copy the data read from the serial port to the CH.  把串口读取到的数据复制给ch
    Serial2.write(
        ch);  //Serial port 2 Outputs the CH content.  串口2输出ch的内容
    M5.Lcd.printf(
        "Serial:%d\n",
        ch);  //The screen prints the data received by serial port 2.  屏幕打印串口2收到的数据
  }

  if (Serial2.available()) {
    int ch = Serial2.read();
    Serial.write(ch);
    M5.Lcd.printf("Serial2:%d\n", ch);
  }
}