Introduction to arduino nano 33 iot, arduino nano 33 iot pinout, arduino nano 33 iot features, arduino nano 33 iot applications
Hi Guys! Hope you’re well today. Happy to see you around. In this post today, I’ll walk you through the Introduction to Arduino Nano 33 IoT. Arduino Nano 33 IoT is mainly used in basic IoT applications. The Internet of things is one of the most exciting and robust developments in the field of information technology. Using this technology you can interface a network of physical things with software, sensors, or other technologies to develop communication and data exchange between devices and other systems using the internet. For example, you can control the room temperature by interfacing the sensors in your rooms with your smartphone through WiFi. Traditional systems including control systems, wireless sensor networks, embedded systems, and home automation all contribute to activating the internet of things. Over the past two decades, networking technologies have been commonly restricted to traditional devices like desktop computers, laptops, and more recently tablets and smartphones. With the inception of innovative technologies, IoT continues to cover scores of devices into the network including medical devices, household appliances, vehicles, electric motors, traffic controls, street lights, smart TVs, and much more. At Arduino, you can either generate your own Arduino Access Point or connect the board with any existing WiFi network. I suggest you buckle up, as I’ll detail the Complete Introduction to Arduino Nano 33 IoT covering pinout, pin description, features, programming, and applications. Let’s get started.

Introduction to Arduino Nano 33 IoT

  • Arduino Nano 33 IoT is a microcontroller board based on low power Arm® Cortex®-M0 32-bit SAMD21.
  • This board features a u-blox, the NINA-W10 that is a low-power chipset mainly employed to develop Bluetooth and WiFi connectivity.
  • With this device, you’ll also get a 6 axis IMU that makes this device an ideal fit for pedometers, vibration alarm systems, and the relative positioning of robots.
  • Moreover, this device contains a Microchip® ECC608 crypto chip that stores the cryptographic keys in hardware and guarantees secure and safe communication.
  • Visit WiFiNINA library reference page and get a hold of several certain examples available for Arduino Nano 33 IoT.
  • This device is completely compatible with the Arduino IoT cloud. You can use the Arduino IoT cloud for free – a simple and efficient way to guarantee safe and secure communication over all connected devices.
Introduction to arduino nano 33 iot, arduino nano 33 iot pinout, arduino nano 33 iot features, arduino nano 33 iot applications
  • There are 14 digital I/O pins, 8 analog pins, and 11 PWM pins incorporated on board.
  • The board contains Flash memory of 256KB. This memory is used to store the Arduino Program (sketch). While the SRAM memory is 32KB that is used to produce and manipulate variables when it runs. There is no EEPROM available on this board.
  • The clock frequency of an oscillator is 48MHz which is used for the synchronization of all internal functions.

Arduino Nano 33 IoT Pinout

The following figure shows the pinout diagram of Arduino Nano 33 IoT.
Introduction to arduino nano 33 iot, arduino nano 33 iot pinout, arduino nano 33 iot features, arduino nano 33 iot applications
The board contains two LEDs i.e. one is a built-in LED connected to pin 13 of the board and the other is the power LED that turns on when power is supplied to the board.

Arduino Nano 33 IoT Pin Description

This is the little introduction to Nano 33. In this section, we will detail the pin description of each pin incorporated on the board.

Digital Pins

The Nano 33 board contains 14 digital pins that you can use as input or output depending on the requirement. These pins receive only two values HIGH or LOW. When pins receive 0V they are in a LOW state when they receive 5V they remain in the HIGH state.

Analog Pins

This board carries 8 analog pins. These pins can receive any value in contrast to digital pins that receive only two values i.e. HIGH or LOW.

PWM Pins

The Nano 33 board features 11 PWM pins. These pins, when activated, generate analog results with digital means.

SPI Pins

This is the serial peripheral interface that is used to develop communication between a controller and other peripheral devices like shift registers or sensors. Two pins: MISO (Master Input Slave Output) and MOSI (Master Output Slave Input) are incorporated for SPI communication between devices. These pins are used to send or receive data by the controller.

I2C Pins

The Nano 33 contains the I2C two-wire communication protocol. It carries two pins SDA and SDL. The SDA is a serial data pin used to carry the data while SCL is a serial clock line used to synchronize all data transfer over the I2C bus.
Introduction to arduino nano 33 iot, arduino nano 33 iot pinout, arduino nano 33 iot features, arduino nano 33 iot applications
The I2C protocol is used to develop communication between two or more integrated circuits.


This board supports UART serial communication protocol with two pins Tx and Rx. The Tx pin is a transmission pin used to transmit serial data while Rx is a receiving pin mainly employed to receive the serial data.

Arduino Nano 33 IoT Features

  • Microcontroller = SAMD21 Cortex®-M0+ 32bit low power ARM MCU
  • Secure Element = ATECC608A
  • Oscillator = 48 MHz
  • Radio module = u-blox NINA-W102
  • Input Voltage (limit) = 21V
  • Flash Memory = 256KB
  • SRAM = 32KB
  • EEPROM = no
  • DC Current per I/O Pin = 7mA
  • Operating Voltage = 3.3V
  • Digital I/O pins = 14
  • PWM Pins = 11
  • Analog Pins = 8
  • External Interrupts = All digital pins
  • Size = 18x45 mm
  • UART = 1
  • SPI = 1
  • I2C = 1
  • Weight = 5gr.

Programming has introduced an official software Arduino IDE to program all boards of the Arduino Family. The C and C++ languages are used in this software to program the Arduino boards. The Nano 33 incorporates a USB port through which you can connect the board with the computer using a USB cable. You can send several instructions to the board and control and program the board as you like better. Plus, the Arduino board includes a Bootloader that is mainly used to burn the program inside the controller, setting you free from buying the separate burner to burn the Arduino program.

Related Boards

You might have witnessed a range of Arduino boards at Some boards share similar functionalities. If you want to expand your experience you can play with other Arduino boards that come with similar IoT functionalities including: Arduino MKR WiFi 1000 – it is only employed for Wi-Fi applications as it comes with a different chipset than Arduino Nano 33 IoT. Arduino Uno Wifi Rev 2 – it is an educational version of the MKR WiFi 1010, incorporated with an embedded accelerometer and USB-B connector. Arduino MKR Wifi 1010 – It is an advanced version of Nano 33 that features a battery charger but lacks an accelerometer.

Arduino Nano 33 IoT Appications

This board is widely used in IoT applications. You can connect this board with an existing WiFi system and control physical things like vehicles, electric motors, medical devices, street lights… over the internet. That’s all for today. I hope you’ve enjoyed reading this article. If you have any questions, you can approach me in the section below. I’d love to help you the best way I can. Feel free to share your valuable suggestions and feedback around the content we share, so we keep producing quality content based on your needs and requirements. Thank you for reading the article.