วิธีแบ่งข้อความด้วยเครื่องหมาย
void setup () {
Serial.begin (115200);
}
String str = "13:45,21:40,23:08";
void loop () {
String part02 = getValue(str,',',1); // get 2 in str
Serial.println(part02);
String subpart02 = getValue(part02,':',0); // get 1 in part02
Serial.println(subpart02);
}
String getValue(String data, char separator, int index)
{
int found = 0;
int strIndex[] = {0, -1};
int maxIndex = data.length()-1;
for(int i=0; i<=maxIndex && found<=index; i++){
if(data.charAt(i)==separator || i==maxIndex){
found++;
strIndex[0] = strIndex[1]+1;
strIndex[1] = (i == maxIndex) ? i+1 : i;
}
}
return found>index ? data.substring(strIndex[0], strIndex[1]) : "";
}
credit : https://www.codegrepper.com/code-examples/c/arduino+c+string+split+by+delimiter