M5StickC_Serial1-2Test_Bokan_Jikken4

M5StickC_Serial1-2_JIkken4-Grove-EXT_-Seria1-2_COM5.ino

//M5StickC_Serial1-2_JIkken4-Grove-EXT_-Seria1-2_COM5.ino
#include <M5StickC.h>
int i;

void setup() {
  M5.begin();
  
 Serial1.begin(115200, SERIAL_8N1, 0, 26); // RX0 TX26 EXT_IO
 Serial2.begin(115200, SERIAL_8N1, 32, 33);// RX33 TX32 Grove
}

void loop() {
   i++;
   //Serial2からCOM4へ送信
   Serial2.write(i);
   Serial.printf("Grove-Serial2_Send to COM4:%d\n\r",i%255);
   delay(10);
   
  //COM4から返信を受信する
  if (Serial1.available()) {
    int inByte = Serial1.read();
    Serial.print("EXT-Serial1_Receive from COM4:");
    Serial.println(inByte);
  }
}