By default arduino 應該冇libc? 所以冇studio.h 畀你include
樓主可以如果唔識用Serial.read() 睇吓呢個post
https://forum.arduino.cc/index.php?topic=217797.0
你要做嘅嘢都read 完返黎做簡單string parsing,我唔畀code la, 自己諗點寫
個flow 只係係郁index/pointer 去拎個char, assume input 係ascii, 又得0 至9 同 space, 拎咗嗰char 返黎睇吓係唔係 space 或啫已經拎哂,係就submit 之前計緊嗰數入array, 同埋將嗰個數reset,
如果只係0-9 就 covert ascii value actual integer ( ch - '0'),將計緊嘅乘10 再+= 啱啱convert 返返嗰個integer