Arduino ABX00032 User manual

Arduino® Nano 33 IoT
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Product Reference Manual
SKU: ABX00027
SKU(with headers): ABX00032
Description
Nano 33 IoT and Nano 33 IoT with headers is a miniature sized module containing a Cortex M0+ SAMD21
processor, a WiFi+BT module based on ESP32, a crypto chip which can securely store certificates and pre-shared
keys and a 6 axis IMU. The module can either be mounted as a DIP component (when mounting pin headers), or as
a SMT component, directly soldering it via the castellated pads.
Target areas:
Maker, enhancements, basic IoT application scenarios

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Features
SAMD21G18A
Processor
256KB Flash
32KB Flash
Power On Reset (POR) and Brown Out Detection (BOD)
Peripherals
12 channel DMA
12 channel event system
5x 16 bit Timer/Counter
3x 24 bit timer/counter with extended functions
32 bit RTC
Watchdog Time
CRC-32 generator
Full speed Host/Device USB with 8 end points
6x SERCOM (USART, I2C, SPI, LIN)
Two channel I2S
12 bit 350ksps ADC (up to 16 bit with oversampling)
10 bit 350ksps DAC
External Interrupt Controller (up to 16 lines)

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Nina W102
Module
Dual Core Tensilica LX6 CPU at up to 240MHz
448 KB ROM, 520KB SRAM, 2MB Flash
WiFi
IEEE 802.11b up to 11Mbit
IEEE 802.11g up to 54MBit
IEEE 802.11n up to 72MBit
2.4 GHz, 13 channels
-96 dBm sensitivity
Bluetooth® BR/EDR
Max 7 peripherals
2.4 GHz, 79 channels
Up to 3 Mbit/s
8 dBm output power at 2/3 Mbit/s
11 dBm EIRP at 2/3 Mbit/s
-88 dBm sensitivity
Bluetooth® Low Energy
Bluetooth® 4.2 dual mode
2.4GHz 40 channels
6 dBm output power
9 dBm EIRP
-88 dBm sensitivity
Up to 1 Mbit/
MPM3610 (DC-DC)
Regulates input voltage from up to 21V with a minimum of 65% efficiency @minimum load
More than 85% efficiency @12V
ATECC608A (Crypto Chip)
Cryptographic co-processor with secure hardware based key storage
Protected storage for up to 16 keys, certificates or data
ECDH: FIPS SP800-56A Elliptic Curve Diffie-Hellman
NIST standard P256 elliptic curve support
SHA-256 & HMAC hash including off-chip context save/restore
AES-128 encrypt/decrypt, galois field multiply for GCM
LSM6DSL (6 axis IMU)
Always-on 3D accelerometer and 3D gyroscope
Smart FIFO up to 4 KByte based
±2/±4/±8/±16 g full scale
±125/±250/±500/±1000/±2000 dps full scale

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Contents
1 The Board
1.1 Application Examples
2 Ratings
2.1 Recommended Operating Conditions
2.2 Power Consumption
3 Functional Overview
3.1 Board Topology
3.2 Processor
3.3 WiFi/BT Communication Module
3.4 Crypto
3.5 IMU
3.6 Power Tree
4 Board Operation
4.1 Getting Started - IDE
4.2 Getting Started - Arduino Web Editor
4.3 Getting Started - Arduino IoT Cloud
4.4 Sample Sketches
4.5 Online Resources
4.6 Board Recovery
5 Connector Pinouts
5.1 USB
5.2 Headers
5.3 Debug
6 Mechanical Information
6.1 Board Outline and Mounting Holes
6.2 Connector Positions
7 Certifications
7.1 Declaration of Conformity CE DoC (EU)
7.2 Declaration of Conformity to EU RoHS & REACH 211 01/19/2021
7.3 Conflict Minerals Declaration
8 FCC Caution
9 Company Information
10 Reference Documentation
11 Revision History

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1 The Board
As all Nano form factor boards, Nano 33 IoT and Nano 33 IoT with headers does not have a battery charger but can
be powered through USB or headers.
NOTE: Arduino Nano 33 IoT and Nano 33 IoT with headers only supports 3.3V I/Os and is NOT 5V tolerant so
please make sure you are not directly connecting 5V signals to this board or it will be damaged. Also, as opposed to
Arduino Nano boards that support 5V operation, the 5V pin does NOT supply voltage but is rather connected,
through a jumper, to the USB power input.
1.1 Application Examples
Weather station: Using the Arduino Nano 33 IoT or Nano 33 IoT with headers together with a sensor and a OLED
display, we can create a small weather station communicating temperature, humidity etc. directly to your phone.
Air quality monitor: Bad air quality may have serious effects on your health. By assembling the board, with a
sensor and monitor you can make sure that the air quality is kept in indoor-environments. By connecting the
hardware assembly to an IoT application/API, you will receive real time values.
Air drum: A quick and fun project is to create a small air drum. Connect your board and upload your sketch from
the Create Web Editor and start creating beats with your audio workstation of your choice.
2 Ratings
2.1 Recommended Operating Conditions
Symbol Description Min Max
Conservative thermal limits for the whole board: -40 °C ( 40 °F) 85°C ( 185 °F)
2.2 Power Consumption
Symbol Description Min Typ Max Unit
VINMax Maximum input voltage from VIN pad -0.3 - 21 V
VUSBMax Maximum input voltage from USB connector -0.3 - 21 V
PMax Maximum Power Consumption - - TBC mW

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3 Functional Overview
3.1 Board Topology
Board topology top
Ref. Description Ref. Description
U1 ATSAMD21G18A Controller U3 LSM6DSOXTR IMU Sensor
U2 NINA-W102-00B WiFi/BLE Module U4 ATECC608A-MAHDA-T Crypto Chip
J1 Micro USB Connector PB1 IT-1185-160G-GTR Push button
Board topology bottom

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Ref. Description Ref. Description
Ref. Description Ref. Description
SJ1 Open solder bridge (VUSB) SJ4 Closed solder bridge (+3V3)
TP Test points xx Lorem Ipsum
3.2 Processor
The Main Processor is a Cortex M0+ running at up to 48MHz. Most of its pins are connected to the external
headers, however some are reserved for internal communication with the wireless module and the on-board
internal I2C peripherals (IMU and Crypto).
NOTE: As opposed to other Arduino Nano boards, pins A4 and A5 have an internal pull up and default to be used
as an I2C Bus so usage as analog inputs is not recommended.
Communication with NINA W102 happens through a serial port and a SPI bus through the following pins.
SAMD21 Pin SAMD21 Acronym NINA Pin NINA Acronym Description
13 PA08 19 RESET_N Reset
39 PA27 27 GPIO0 Attention Request
41 PA28 7 GPIO33 Acknowledge
23 PA14 28 GPIO5 SPI CS
21 GPIO19 UART RTS
24 PA15 29 GPIO18 SPI CLK
20 GPIO22 UART CTS
22 PA13 1 GPIO21 SPI MISO
21 PA12 36 GPIO12 SPI MOSI
31 PA22 23 GPIO3 Processor TX 🡺 Nina RX
32 PA23 22 GPIO1 Processor RX 🡸 Nina TX
3.3 WiFi/BT Communication Module
Nina W102 is based on ESP32 and is delivered with a pre-certified software stack from Arduino. Source code for the
firmware is available [9].
NOTE: Reprogramming the wireless module’s firmware with a custom one will invalidate compliance with radio
standards as certified by Arduino, hence this is not recommended unless the application is used in private
laboratories far from other electronic equipment and people. Usage of custom firmware on radio modules is the
sole responsibility of the user.
Some of the module’s pins are connected to the external headers and can be directly driven by ESP32 provided
SAMD21’s corresponding pins are aptly tri-stated. Below is a list of such signals:
SAMD21 Pin SAMD21 Acronym NINA Pin NINA Acronym Description
48 PB03 8 GPIO21 A7
14 PA09 5 GPIO32 A6
8 PB09 31 GPIO14 A5/SCL
7 PB08 35 GPIO13 A4/SDA

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3.4 Crypto
The crypto chip in Arduino IoT boards is what makes the difference with other less secure boards as it provides a
secure way to store secrets (such as certificates) and accelerates secure protocols while never exposing secrets in
plain text.
Source code for the Arduino Library that supports the Crypto is available [10]
3.5 IMU
The board has an embedded 6 axis IMU which can be used to measure board orientation (by checking the gravity
acceleration vector orientation) or to measure shocks, vibration, acceleration and rotation speed.
Source code for the Arduino Library that supports the IMU is available [11]
3.6 Power Tree

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Power tree
4 Board Operation
4.1 Getting Started - IDE
If you want to program your board while offline you need to install the Arduino Desktop IDE [1] To connect the
Arduino 33 IoT to your computer, you’ll need a Micro-B USB cable. This also provides power to the board, as
indicated by the LED.
4.2 Getting Started - Arduino Web Editor
All Arduino boards, including this one, work out-of-the-box on the Arduino Web Editor [2], by just installing a simple
plugin.
The Arduino Web Editor is hosted online, therefore it will always be up-to-date with the latest features and support
for all boards. Follow [3] to start coding on the browser and upload your sketches onto your board.
4.3 Getting Started - Arduino IoT Cloud
All Arduino IoT enabled products are supported on Arduino IoT Cloud which allows you to Log, graph and analyze
sensor data, trigger events, and automate your home or business.
4.4 Sample Sketches
Sample sketches for the Arduino 33 IoT can be found either in the “Examples” menu in the Arduino IDE or in the
“Documentation” section of the Arduino Pro website [4]
4.5 Online Resources
Now that you have gone through the basics of what you can do with the board you can explore the endless
possibilities it provides by checking exciting projects on ProjectHub [5], the Arduino Library Reference [6] and the
online store [7] where you will be able to complement your board with sensors, actuators and more

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4.6 Board Recovery
All Arduino boards have a built-in bootloader which allows flashing the board via USB. In case a sketch locks up the
processor and the board is not reachable anymore via USB it is possible to enter bootloader mode by double-
tapping the reset button right after power up.
5 Connector Pinouts
Pinout