Grove Arduino Code Samples

Table of contents

1. Info
2. Components
   1. Sensors
   2. Actuators
3. Programming the Board
   1. Blinking with an LED
   2. Pressing Button to Light Up LED
   3. Controlling the Frequency of the Blink with a Potentiometer
   4. Making the Buzzer go BEEP

---

Info

This website serves as a collection of code samples for the Grove Arduino Beginner Kit. Use these code examples as a starting point and modify the code samples for your projects.

Every project will have a set of sensors, actuators, and one microcontroller.

Let’s first look at our base board. This is what your hardware should look like:

Components

• Microcontroller - Arduino Uno

Sensors

• Button
• Potentiometer
• Microphone (or sound sensor)
• Light Sensor
• Temperature and humidity

Actuators

• LED Light
• Servo motors
• Speaker (or Buzzer)
• OLED Display

Programming the Board

This is a plug and play board! Which means no wiring required unless we cut out the components.

Let’s try out some simple code examples.

Blinking with an LED

You need:

• Control: Seeeduino
• Output: LED module

//LED Blink
//The LED will turn on for one second and then turn off for one second
int ledPin = 4;
void setup() {
    pinMode(ledPin, OUTPUT);
}
void loop() {
    digitalWrite(ledPin, HIGH);
    delay(1000);
    digitalWrite(ledPin, LOW);
    delay(1000);
}

Pressing Button to Light Up LED

You need:

• Input: Button
• Control: Seeeduino
• Output: LED module

//Button to turn ON/OFF LED
//Constants won't change. They're used here to set pin numbers:
const int buttonPin = 6;     // the number of the pushbutton pin
const int ledPin =  4;      // the number of the LED pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
}

void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }
}

Controlling the Frequency of the Blink with a Potentiometer

You need:

• Input: Potentiometer
• Control: Seeeduino
• Output: LED module

//Rotary controls LED
int rotaryPin = A0;    // select the input pin for the rotary
int ledPin = 4;      // select the pin for the LED
int rotaryValue = 0;  // variable to store the value coming from the rotary

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT);
  pinMode(rotaryPin, INPUT);
}

void loop() {
  // read the value from the sensor:
  rotaryValue = analogRead(rotaryPin);
  // turn the ledPin on
  digitalWrite(ledPin, HIGH);
  // stop the program for <sensorValue> milliseconds:
  delay(rotaryValue);
  // turn the ledPin off:
  digitalWrite(ledPin, LOW);
  // stop the program for for <sensorValue> milliseconds:
  delay(rotaryValue);
}

Making the Buzzer go BEEP

You need:

• Control: Seeeduino
• Output: LED Buzzer

int BuzzerPin = 5;

void setup() {
  pinMode(BuzzerPin, OUTPUT);
}

void loop() {
  analogWrite(BuzzerPin, 128);
  delay(1000);
  analogWrite(BuzzerPin, 0);
  delay(0);
}

Challenge: Can you make the buzzer go beep when the button is pressed?