Arduino® Nano 33 BLE Sense Rev2

Description

The Arduino Nano 33 BLE Sense Rev2 is a miniature sized module containing a NINA B306 module, based on Nordic nRF52480 and containing a Cortex M4F. The BMI270 and BMM150 jointly provide a 9 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, IoT application

Features

NINA B306 Module

Processor

• 64 MHz Arm® Cortex®-M4F (with FPU)
• 1 MB Flash + 256 KB RAM

Bluetooth® 5 multiprotocol radio

• 2 Mbps
• CSA #2
• Advertising Extensions
• Long Range
• +8 dBm TX power
• -95 dBm sensitivity
• 4.8 mA in TX (0 dBm)
• 4.6 mA in RX (1 Mbps)
• Integrated balun with 50 Ω single-ended output
• IEEE 802.15.4 radio support
• Thread
• Zigbee

Peripherals

• Full-speed 12 Mbps USB
• NFC-A tag
• Arm CryptoCell CC310 security subsystem
• QSPI/SPI/TWI/I²S/PDM/QDEC
• High speed 32 MHz SPI
• Quad SPI interface 32 MHz
• EasyDMA for all digital interfaces
• 12-bit 200 ksps ADC
• 128 bit AES/ECB/CCM/AAR co-processor

BMI270 6-axis IMU (Accelerometer and Gyroscope)

• 16-bit
• 3-axis accelerometer with ±2g/±4g/±8g/±16g range
• 3-axis gyroscope with ±125dps/±250dps/±500dps/±1000dps/±2000dps range

BMM150 3-axis IMU (Magnetometer)

• 3-axis digital geomagnetic sensor
• 0.3µT resolution
• ±1300µT (x,y-axis), ±2500µT (z-axis)

LPS22HB (Barometer and temperature sensor)

• 260 to 1260 hPa absolute pressure range with 24 bit precision
• High overpressure capability: 20x full-scale
• Embedded temperature compensation
• 16-bit temperature data output
• 1 Hz to 75 Hz output data rate
• Interrupt functions: Data Ready, FIFO flags, pressure thresholds

HS3003 Temperature & humidity sensor

• 0-100% relative humidity range
• Humidity accuracy: ±1.5%RH, typical (HS3001, 10 to 90%RH,25°C)
• Temperature sensor accuracy: ±0.1°C, typical
• Up to 14-bit humidity and temperature output data

APDS-9960 (Digital proximity, Ambient light, RGB and Gesture Sensor)

• Ambient Light and RGB Color Sensing with UV and IR blocking filters
• Very high sensitivity – Ideally suited for operation behind dark glass
• Proximity Sensing with Ambient light rejection
• Complex Gesture Sensing

MP34DT06JTR (Digital Microphone)

• AOP = 122.5 dbSPL
• 64 dB signal-to-noise ratio
• Omnidirectional sensitivity
• -26 dBFS ± 3 dB sensitivity

MP2322 DC-DC

• Regulates input voltage from up to 21V with a minimum of 65% efficiency @minimum load
• More than 85% efficiency @12V

1 The Board

As all Nano form factor boards, Nano 33 BLE Sense Rev2 does not have a battery charger but can be powered through USB or headers.

NOTE: Arduino Nano 33 BLE Sense Rev2 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 Ratings

1.1.1 Recommended Operating Conditions

1.2 Power Consumption

2 Functional Overview

2.1 Board Topology

A photograph of the Arduino Nano 33 BLE Sense Rev2 board, showing its compact form factor, the NINA B306 module, headers, and various sensor components.

Top View: The top side of the board features the main NINA-B306 module (U1), the BMI270 IMU (U2), the MP34DT06JTR microphone (U3), the BMM150 magnetometer (U7), the APDS-9960 ambient sensor (U5), the LPS22HB pressure sensor (U9), the MP2322 DC-DC converter (U6), a push button (PB1), and two LEDs (DL1, DL2).

Bottom View: The bottom side displays several jumpers labeled SJ1, SJ2, SJ3, and SJ4, used for VUSB, D7, 3v3, and D8 connections respectively.

2.2 Processor

The Main Processor is an Arm® Cortex®-M4F running at up to 64MHz. 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.

2.3 IMU

The Arduino Nano 33 BLE Sense Rev2 provides IMU capabilities with 9-axis, by combination of the BMI270 and BMM150 ICs. The BMI270 includes both a three axis gyroscope as well as an three axis accelerometer, while the BMM150 is capable of sensing magnetic field variations in all three dimensions. The information obtained can be used for measuring raw movement parameters as well as for machine learning.

2.4 LPS22HB (U9) Barometer and Temperature Sensor

The LPS22HB pressure sensor IC (U9) includes both a piezoresistive absolute pressure sensor together with a temperature sensor integrated into a small chip. The pressure sensor (U9) interfaces with the main microcontroller (U1) via an I2C interface. The sensing element is composed of a micromachined suspended membrane for measuring absolute pressure, and includes a Wheatstone bridge internally for measuring the piezoresistive elements. The temperature perturbations are compensated via an included temperature sensor on-chip. The absolute pressure can range from 260 to 1260 hPa. Pressure data can be polled via I2C at up to 24-bits, while temperature data can be polled at up to 16-bits. The Arduino_LPS22HB library provides a ready to use implementation of the I2C protocol with this chip.

2.5 HS3003 (U8) Relative Humidity and Temperature Sensor

The HS3003 (U8) is a MEMS sensor, designed to provide accurate readings of relative humidity and temperature in a small package. Temperature-compensation and calibration is performed on-chip, without requiring external circuitry. The HS3003 can measure the relative humidity from 0% to 100%RH with fast response times (under 4 seconds). The included on-chip temperature sensor (used for compensation) has a temperature accuracy of ±0.1°C. U8 communicates via the main microcontroller via an I2C bus.

2.5.1 Gesture Detection

Gesture detection utilizes four directional photodiodes to sense reflected IR energy (sourced by the integrated LED) to convert physical motion information (i.e. velocity, direction and distance) to a digital information. The architecture of the gesture engine features automatic activation (based on Proximity engine results), ambient light subtraction, cross-talk cancellation, dual 8-bit data converters, power saving inter-conversion delay, 32-dataset FIFO, and interrupt driven I2C communication. The gesture engine accommodates a wide range of mobile device gesturing requirements: simple UP-DOWN-RIGHT-LEFT gestures or more complex gestures can be accurately sensed. Power consumption and noise are minimized with adjustable IR LED timing.

2.5.2 Proximity Detection

The Proximity detection feature provides distance measurement (E.g. mobile device screen to user's ear) by photodiode detection of reflected IR energy (sourced by the integrated LED). Detect/release events are interrupt driven, and occur whenever proximity result crosses upper and/ or lower threshold settings. The proximity engine features offset adjustment registers to compensate for system offset caused by unwanted IR energy reflections appearing at the sensor. The IR LED intensity is factory trimmed to eliminate the need for end-equipment calibration due to component variations. Proximity results are further improved by automatic ambient light subtraction.

2.5.3 Color and ALS Detection

The Color and ALS detection feature provides red, green, blue and clear light intensity data. Each of the R, G, B, C channels have a UV and IR blocking filter and a dedicated data converter producing 16-bit data simultaneously. This architecture allows applications to accurately measure ambient light and sense color which enables devices to calculate color temperature and control display backlight.

2.6 Digital Microphone

The MP34DT06JTR is an ultra-compact, low-power, omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface. The sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon micromachining process dedicated to produce audio sensors.

2.7 Power Tree

The board can be powered via USB connector, VIN or VUSB pins on headers.

A power flow diagram illustrating how power enters the board via VUSB or VIN. It passes through a diode and a DC-DC regulator to supply +3V3. This +3V3 rail then powers various onboard components including the NINA B306 module (15mA), BMI270/BMM150 (2mA), LPS22HB (12µA), HS3003 (2µA), APDS-9960 (790µA), MP34DT05 (650µA), and ECC608 (14mA), with a significant allocation for user applications (950mA).

NOTE: Since VUSB feeds VIN via a Schottky diode and a DC-DC regulator specified minimum input voltage is 4.5V the minimum supply voltage from USB has to be increased to a voltage in the range between 4.8V to 4.96V depending on the current being drawn.

3 Board Operation

3.1 Getting Started - IDE

If you want to program your Arduino Nano 33 BLE Sense Rev2 while offline you need to install the Arduino Desktop IDE [1]. To connect the Arduino Nano 33 BLE Sense Rev2 to your computer, you'll need a Micro-B USB cable. This also provides power to the board, as indicated by the LED.

3.2 Getting Started - Arduino Web Editor

All Arduino boards, including this one, work out-of-the-box on the Arduino Web Editor, 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 to start coding on the browser and upload your sketches onto your board.

3.3 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.

3.4 Sample Sketches

Sample sketches for the Arduino Nano 33 BLE Sense Rev2 can be found either in the "Examples" menu in the Arduino IDE or in the "Documentation" section of the Arduino Pro website.

3.5 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, the Arduino Library Reference and the on line store where you will be able to complement your board with sensors, actuators and more.

3.6 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.

4 Connector Pinouts

4.1 USB

4.2 Headers

The board exposes two 15 pin connectors which can either be assembled with pin headers or soldered through castellated vias.

4.3 Debug

On the bottom side of the board, under the communication module, debug signals are arranged as 3x2 test pads with 100 mil pitch with pin 4 removed. Pin 1 is depicted in Figure 3 – Connector Positions

5 Mechanical Information

5.1 Board Outline and Mounting Holes

The board measures are mixed between metric and imperial. Imperial measures are used to maintain 100 mil pitch grid between pin rows to allow them to fit a breadboard whereas board length is Metric.

A technical drawing showing the physical dimensions of the Arduino Nano 33 BLE Sense Rev2 board. The board measures 40.64mm in length and 17.76mm in width, with a 1.26mm thickness. It features two 15-pin connectors on each side, designed for breadboard compatibility, and includes mounting holes with a diameter of Ø1.65mm.

6 Certifications

6.1 Declaration of Conformity CE DOC (EU)

We declare under our sole responsibility that the products above are in conformity with the essential requirements of the following EU Directives and therefore qualify for free movement within markets comprising the European Union (EU) and European Economic Area (EEA).

6.2 Declaration of Conformity to EU RoHS & REACH 211 01/19/2021

Arduino boards are in compliance with RoHS 2 Directive 2011/65/EU of the European Parliament and RoHS 3 Directive 2015/863/EU of the Council of 4 June 2015 on the restriction of the use of certain hazardous substances in electrical and electronic equipment.

Exemptions: No exemptions are claimed.

Arduino Boards are fully compliant with the related requirements of European Union Regulation (EC) 1907 /2006 concerning the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH). We declare none of the SVHCs (https://echa.europa.eu/web/guest/candidate-list-table), the Candidate List of Substances of Very High Concern for authorization currently released by ECHA, is present in all products (and also package) in quantities totaling in a concentration equal or above 0.1%. To the best of our knowledge, we also declare that our products do not contain any of the substances listed on the "Authorization List" (Annex XIV of the REACH regulations) and Substances of Very High Concern (SVHC) in any significant amounts as specified by the Annex XVII of Candidate list published by ECHA (European Chemical Agency) 1907 /2006/EC.

6.3 Conflict Minerals Declaration

As a global supplier of electronic and electrical components, Arduino is aware of our obligations with regards to laws and regulations regarding Conflict Minerals, specifically the Dodd-Frank Wall Street Reform and Consumer Protection Act, Section 1502. Arduino does not directly source or process conflict minerals such as Tin, Tantalum, Tungsten, or Gold. Conflict minerals are contained in our products in the form of solder, or as a component in metal alloys. As part of our reasonable due diligence Arduino has contacted component suppliers within our supply chain to verify their continued compliance with the regulations. Based on the information received thus far we declare that our products contain Conflict Minerals sourced from conflict-free areas.

7 FCC Caution

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

• (1) This device may not cause harmful interference
• (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC RF Radiation Exposure Statement:

1. This Transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
2. This equipment complies with RF radiation exposure limits set forth for an uncontrolled environment.
3. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

English: User manuals for license-exempt radio apparatus shall contain the following or equivalent notice in a conspicuous location in the user manual or alternatively on the device or both. This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference (2) this device must accept any interference, including interference that may cause undesired operation of the device.

French: Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l' appareil nedoit pas produire de brouillage (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

IC SAR Warning:

English This equipment should be installed and operated with minimum distance 20 cm between the radiator and your body.

French: Lors de l' installation et de l' exploitation de ce dispositif, la distance entre le radiateur et le corps est d'au moins 20 cm.

8 Company Information

9 Reference Documentation

• Arduino IDE (Desktop): https://www.arduino.cc/en/software
• Arduino IDE (Cloud): https://create.arduino.cc/editor
• Cloud IDE Getting Started: https://create.arduino.cc/projecthub/Arduino_Genuino/getting-started-with-arduino-web-editor-4b3e4a
• Forum: http://forum.arduino.cc/
• Nina B306: https://content.u-blox.com/sites/default/files/NINA-B3_DataSheet_UBX-17052099.pdf
• Arduino_LPS22HB Library: https://github.com/arduino-libraries/Arduino_LPS22HB
• Arduino_APDS9960 Library: https://github.com/arduino-libraries/Arduino_APDS9960
• ProjectHub: https://create.arduino.cc/projecthub?by=part&part_id=11332&sort=trending
• Library Reference: https://www.arduino.cc/reference/en/

10 Revision History