ESP32DevkitC Serial1 Test Jikken4

ESP32_Serial1_00RX_04TX_Jikken4.ino

 //HardwareSerial Serial2(2);//これは不要でいれるとエラーになる

void setup() {
  // initialize both serial ports:
  Serial.begin(115200);
  //Serial2.begin(115200);
   Serial1.begin(115200, SERIAL_8N1, 0, 4);//GPIO0:RX=pin25,GPIO4:TX=pin26
}

void loop() {
  // read from port 1, send to port 0:
  if (Serial1.available()) {
    int inByte = Serial1.read();
    Serial.print("Recieved=");
    Serial.println(inByte);
  }

  // read from port 0, send to port 1:
  if (Serial.available()) {
    int inByte = Serial.read();
    Serial.print("KeyIn=");
    Serial.println(inByte);
    Serial1.write(inByte);
  }
}