ARDUINO NANO 33 IOT WITH
HEADERS
Code: ABX00032
The ease of use of a Nano board with the addition of secure IoT
and BT connectivity.
Estimate shipping date, end of July 2019
This small, robust and powerful board has WiFi and Bluetooth connectivity
that combined with its low power architecture makes it a practical and cost
effective solution for your connected projects.
Arduino Nanof 33 IoT is fully compatible with the Arduino IoT Cloud and
supports full TLS secure transport: the ATECC608A cryptochip stores the
cryptographic keys in hardware, offering a very high level of security for
this class of products. The integration with the Arduino IoT Cloud offers
also a very efficient way of setting up online dashboards with little coding
and minimal effort .
In the same iconic size of the Arduino NANO, the Arduino Nano 33 IoT
hosts an Arm Cortex-M0+ SAMD21 processor, a WiFi and Bluetooth
module based on ESP32, a 6 axis Inertial Measurement Unit (IMU) and a
crypto chip which can securely store certificates and pre shared keys .
The board can either be used in a breadboard (when mounting pin
headers), or as a SMT module, directly soldering it via the castellated
pads.
With headers mounted.
TECH SPECS
This board is based on the SAMD21G18A microcontroller.
Clock
up to 48MHz
Flash
256KB
SRAM
32KB
Please note: Arduino Nano 33 IoT 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.
To avoid such risk with existing projects, where you should be able to pull
out a Nano and replace it with the new Nano 33 IoT, we have the 5V pin
on the header, positioned between RST and A7 that is not connected as
default factory setting. This means that if you have a design that takes 5V
from that pin, it won’t work immediately, as a precaution we put in place to
draw your attention to the 3.3V compliance on digital and analog inputs.
5V on that pin is available only when two conditions are met: you make a
solder bridge on the two pads marked as VUSB and you power the NANO
33 IoT through the USB port. If you power the board from the VIN pin, you
won’t get any regulated 5V and therefore even if you do the solder bridge,
nothing will come out of that 5V pin. The 3.3V, on the other hand, is
always available and supports enough current to drive your sensors.
Please make your designs so that sensors and actuators are driven with
3.3V and work with 3.3V digital IO levels. 5V is now an option for many
modules and 3.3V is becoming the standard voltage for electronic ICs.
The communication on WiFi and Bluetooth is managed by a NINA
W102 ESP32 based module. The module is connected to the SAMD21
microcontoller with an SPI BUS and a serial port through the following
pins:
SAMD21 Pin
SAMD21 Acronym
NINA Pin NINA Acronym
Description
13
PA8
19
RESET_N
Reset
39
PA27
27
GPIO0
Attention Request
41
PA28
7
GPIO33
Acknowledge
23
PA14
28 / 21
GPIO5 / GPIO19
SPI CS / UART RTS
24
PA15
29 / 20
GPIO18 / GPIO22
SPI CLK / 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
NINA TX -> Processor RX
Some of the NINA W102 pins are connected to the 15+15 pins
headers/pads and can be directly driven by the module's ESP32; in this
case it is necessary that the SAMD21 corresponding pins are aptly tri stated. Below is a list of such signals:
SAMD21 Pin
SAMD21 Acronym
NINA Pin
NINA Acronym
Header Description
48
PB03
8
RESET_N
A7
14
PA09
5
GPIO0
A6
8
PB09
31
GPIO33
A5/SCL
7
PB08
35
GPIO5 / GPIO19
A4/SDA
The IMU is a LSM6DSL and it is managed through I2C.
The crypto chip is an ATECC608A and has a supporting library that is
used by the WiFiNINA library.
The board has a two 15 pins connectors - one on each side -, pin to pin
compatible with the original Arduino Nano.
Pin
Funcion
Type
Description
1
D13
Digital
GPIO
2
+3V3
Power Out Internally generated power output to external devices
3
AREF
Analog
4
A0/DAC0 Analog
ADC in/DAC out; can be used as GPIO
5
A1
Analog
ADC in; can be used as GPIO
6
A2
Analog
ADC in; can be used as GPIO
7
A3
Analog
ADC in; can be used as GPIO
8
A4/SDA
Analog
ADC in; I2C SDA; Can be used as GPIO (*)
9
A5/SCL
Analog
ADC in; I2C SCL; Can be used as GPIO(*)
10
A6
Analog
ADC in; can be used as GPIO
11
A7
Analog
ADC in; can be used as GPIO
12
VUSB
Power
In/Out
Normally NC; can be connected to VUSB pin of the USB connector by
shorting a jumper
13
RST
Digital In
Active low reset input (duplicate of pin 18)
14
GND
Power
Power Ground
15
VIN
Power In
Vin Power input
16
TX
Digital
USART TX; can be used as GPIO
17
RX
Digital
USART RX; can be used as GPIO
18
RST
Digital
Active low reset input (duplicate of pin 13)
19
GND
Power
Power Ground
20
D2
Digital
GPIO
21
D3/PWM Digital
GPIO; can be used as PWM
22
D4
GPIO
Digital
Analog Reference; can be used as GPIO
23
D5/PWM Digital
GPIO; can be used as PWM
24
D6/PWM Digital
GPIO; can be used as PWM
25
D7
Digital
GPIO
26
D8
Digital
GPIO
27
D9/PWM Digital
GPIO; can be used as PWM
28
D10/PWM Digital
GPIO; can be used as PWM
29
D11/MOSI Digital
SPI MOSI; can be used as GPIO
30
D12/MISO Digital
SPI MISO; can be used as GPIO
(*) As opposed to other Arduino Nano boards, pins A4 and A5 have an
internal pull up and default to be used as an I 2 C Bus so usage as analog
inputs is not recommended. 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.
On the bottom side of the board, under the communication module, debug
signals are arranged as 3x2 test pads with 100 mil pitch. Pin 1 is the
bottom left one with the USB connector on the left and the test pads on
the right
Pin
Function Type
Description
1
+3V3
Power Out Internally generated power output to be used as voltage reference
2
SWD
Digital
SAMD11 Single Wire Debug Data
3
SWCLK
Digital In
SAMD11 Single Wire Debug Clock
4
UPDI
Digital
ATMega4809 update interface
5
GND
Power
Power Ground
6
RST
Digital In
Active low reset input
https://store.arduino.cc/usa/nano-33-iot-with-headers/6-11-19
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