M5StickC_Serial1-2_JIkken1-EXT_Seial2_COM4

M5StickC_Serial1-2_JIkken1-EXT_Seial2_COM4.ino

//M5StickC_Serial1-2_JIkken1-EXT_Seial2_COM4.ino
#include <M5StickC.h>
int i;
// COM5＝＞COM4=>COM5 LoopBack
void setup() {
  M5.begin();
  
 Serial2.begin(115200, SERIAL_8N1,0,26); // RX06 TX26 EXT_IO
  //Serial2.begin(115200, SERIAL_8N1, 32, 33);// RX32 TX33 Grove
}

void loop() {
   
  //COM5から受信する
  if (Serial2.available()) {
    int inByte = Serial2.read();
    Serial.print("EXT-Serial2_Receive from COM5:");
    Serial.println(inByte);
    //COM5へ返信
    Serial2.write(inByte);
  }
}