Arduino strtok

In this tutorial, we will discuss the tokenizing of a string using the strtok() function present in Arduino.

Tokenize a String Using the strtok() Function in Arduino

Consider, you have a char array of animal names separated by a comma, and you want to separate each name from the char array. In this case, you can use the strtok() function to separate the animal names from the char array. The strtok() function takes two variables as input. The first variable is of type char in which the animal names are stored, and the second variable is a delimiter for separation like a comma. This function returns a variable of type char separated based on a delimiter. For example, suppose we need to separate an animal’s first name from a list of animal names.

void setup() {
  char AnimalNames[] = "Bog,Cat";
  char firstName = strtok(AnimalNames, ",");
}

In the above code, the animal names are stored in the variable AnimalNames of type char, and the result will be stored in the variable firstName of type char. You can change the variables according to the given variables. Now consider another example, we want to extract all the names of animals present in a list and print them on the serial monitor of Arduino. To do this, we have to use a loop that will iterate the list until it’s empty.

char AnimalNames[] = "dog,cat,donkey,horse";
char *name = NULL;
void setup() {
  name = strtok(AnimalNames, ",");
  Serial.begin(9600);
  while (name != NULL) {
    Serial.println(name);
    name = strtok(NULL, ",");
  }
}

In the above code, the animal names are stored in the variable AnimalNames of type char and the result will be stored in the variable name of type char. You can change the variables according to the given variables. The names of the animals will be displayed on the serial monitor using the Serial.print() function.