#include <string.h>

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void test1(char * ids){
  char * pch = strtok(ids,",");
  while(pch != NULL) {
    Serial.println(pch);
    pch = strtok(NULL,",");
  }
  Serial.println("---");
  delay(2000);
}

void loop() {
  char * ids = "9,5,0,1,8,6";
  test1(ids);
  char * ids1 = "9,5,0,1,8,6";
  test1(ids1);
  char * ids2 = "9,5,0,1,8,6";
  test1(ids2);
}