m0_37925407的博客

详细介绍地址 https://www.w3cschool.cn/arduino/arduino_board_description.html

void setup(){ Serial.begin(9600)； } String bytes =""; void loop() { while (Serial.available() > 0) { bytes += char(Serial.read()); delay(2); } int index=bytes.toInt(); if(index>0&&index<1000) {...