Warning: This product requires a button battery to operate which is hazardous to young children. Do not use this product for projects that are potentially accessible to young children.
The Arduino Primo Core is the compact Arduino board developed in cooperation with Nordic Semiconductor.
For the little dimension, the Bluetooth integrated and the Low Power the board is ideal for IoT world and in particular for the wearables.
The Microcontroller used is the same of the Arduino Primo, the Nordic microcontroller nRF52832.
Furthermore the Arduino Primo Core has:
- 10 digital input/output pins
- 10 PWM (all digital pins)
- 8 analog pins (from D0 at D7)
- Accelerometer and Gyroscope
- Temperature and Humidity sensor
- RGB Led
- SWD connector (to program the board using an external programmer)
- A coin cell battery connector
- BLE interface
- NFC connector (to use an external NFC Antenna)
- Reset buttons (to reset the microcontroller)
- On/Off switch for powering the board
The Arduino Primo Core can be powered using the integrated slot for an external battery.
The battery used in the slot is the button cell CR2032 of 3V.
Furthermore it is also possible to use an external power supply to the Vin pin.
The nRF52832 has 512 KB of Flash memory and 64 KB of SRAM. There is no onboard EEPROM memory.
Input and Output
Each of the 10 digital pins on the Arduino Primo Core can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. They operate at 3.3V. Each pin can provide or receive a maximum current of 14 mA.
In addition, some pins have specialized functions:
- Serial: RX and TX: these pins are used to receive (RX) and transmit (TX) TTL serial data.
- External Interrupts: all pins can be used as external interrupts. Keep in mind that you can’t use more than eight interrupt pins at the same time. These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt() function for details.
- PWM: pulse width modulation is available on all pins. The 12-bit PWM output resolution can be adjusted using the analogWriteResolution() function.
- SPI: a Serial Peripheral Interface (SPI) bus is available using pins 4 (MOSI), 5 (MISO), and 6 (SCK) and 7 (SS) but it is possible to change them and use other pins. For more information about it visit the SPI library.
- TWI: Two-wire interface (TWI) communication is available from the serial data line (SDA) and serial clock line (SCL) pins. TWI communication is supported using the Wire library.
- RESET. Bringing the reset line LOW will reset the microcontroller.
- NFC1 and NFC2 for NFC communication
The Primo Core has also 8 analog inputs, labeled D0 through D7, each of which provide up to 14 bits of resolution (i.e., 16384 different values). By default they measure from ground to 3.3 volts, though it is possible to change the upper end of their range using the analogReference() function.
Onboard there are some sensors and actuators:
- A Led managed using the macro USER_LED or LED_BUILTIN. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off.
- A RGB managed using the macro RED_LED, BLUE_LED and GREEN_LED.
- Temperature and Humidity sensor (ST HT221)
- Accelerometer and Gyroscope (ST LSM6DS3)
The Arduino Primo Core has a number of facilities available for communicating with other devices.
In particular it has a Bluetooth interface 4.0 that allows to communicate with PC, tablet and smartphone and to program the board. This interface is managed from the BLE library. This library is contained in the nRF52 platform, downloadable from Board Manager of the Arduino IDE 1.8.x or later.
The board supports also the NFC communication until to 106 kbps as bit rate and 13,56 MHz of frequency. It needs only to connect the NFC antenna in the corresponding connector. The NFC is managed from NFC library and also this is contained in the nRF52 platform.
Furthermore the nRF52832 supports also the I2C (TWI) communication. The Arduino software includes a Wire libraryto simplify use of the I2C bus.
In the Arduino Primo Core is also possible to use the SPI communication, using the default configuration (MOSI=4, MISO=5, SCK=6, SS=7) or defining the pins that you use directly in the sketch. For more information visit the SPI library.
The Arduino Primo Core can be programmed in different ways, using:
- the Bluetooth (soon);
- an external programmer, for example Atmel ICE;
- an Arduino Primo.
All these procedures use the Arduino IDE. The board is available from Arduino IDE 1.8.x version, downloading the corresponding platform (Arduino NRF52) from the Board Manager.
For more information about it look the Getting Started.
The Arduino Primo Core is characterized from small size so that can be used wearable. The length and width of board is 32 x 32 mm respectively.
Now you are ready to begin using your Arduino Primo Core following the Getting Started.
This product is listed in:
Documentation and Resources:
- Arduino Workshop for Beginners
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- C Programming for Makers
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- The Maker Revolution
The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...
- History of Arduino
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- Arduino with LattePanda
Ah, Arduino and LattePanda coming together at last. What could be better? Well along with the fact that your LattePanda is a fully fledged Windows 10 computer so you can program any Arduino board you want as normal, one of the best things about Latte...
- Potentiometers and the Arduino Uno
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- Cosplay Blaster
Hey guys! First time poster. I've been working on a blaster for my girlfriend's costume, and I thought I would share it with everyone. When triggered, it plays a selected sound effect and flashes the light. Pretty simple :)
- Coffee Grinder With Arduino
Using a few bits and pieces, this ordinary coffee grinder now has two presets to run the motor for a programmable length of time. The idea being that the grinder running for a set amount of time will deliver a certain amount of coffee each button press meaning the beans can be stored unground, keeping them fresher for longer. I completed this project for a friend, Ian, who lives for coffee. Ian wanted the same functionality in h...
- The Hipster Coaster
We wanted to make a interactive display of the fun that can be had with DIY projects to take to Sydney Mini Maker Faire. We decided to do so by utilising the TinkerKit Braccio from Arduino.org, alongside some 3D Printing ingenuity, for an engaging display for all ages. Enter the Hipster Coaster in all its glory. All the parts were printed seperately on our family of Lulzbot 3D Printers, later stuck together using a mi...
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