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Gilbert Tanner
Published © GPL3+

Arduino Nano 33 BLE Sense Overview

The Arduino Nano 33 BLE Sense is an evolution of the traditional Nano, but featuring a lot more powerful processor and on board sensors.

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Arduino Nano 33 BLE Sense Overview

Things used in this project

Hardware components

Arduino Nano 33 BLE Sense
Arduino Nano 33 BLE Sense
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Arduino IDE
Arduino IDE

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Code

Arduino HTS221 ReadSensor Example

Arduino
#include <Arduino_HTS221.h>

void setup() {
  Serial.begin(9600);
  while (!Serial);

  if (!HTS.begin()) {
    Serial.println("Failed to initialize humidity temperature sensor!");
    while (1);
  }
}

void loop() {
  // read all the sensor values
  float temperature = HTS.readTemperature();
  float humidity    = HTS.readHumidity();

  // print each of the sensor values
  Serial.print("Temperature = ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("Humidity    = ");
  Serial.print(humidity);
  Serial.println(" %");

  // print an empty line
  Serial.println();

  // wait 1 second to print again
  delay(1000);
}

HTS221 ReadSensors Example

Arduino
#include <Arduino_HTS221.h>

void setup() {
  Serial.begin(9600);
  while (!Serial);

  if (!HTS.begin()) {
    Serial.println("Failed to initialize humidity temperature sensor!");
    while (1);
  }
}

void loop() {
  // read all the sensor values
  float temperature = HTS.readTemperature();
  float humidity    = HTS.readHumidity();

  // print each of the sensor values
  Serial.print("Temperature = ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("Humidity    = ");
  Serial.print(humidity);
  Serial.println(" %");

  // print an empty line
  Serial.println();

  // wait 1 second to print again
  delay(1000);
}

HTS221 ReadSensors Example Output

Plain text
Temperature = 28.50 °C
Humidity    = 36.24 %

Temperature = 28.57 °C
Humidity    = 35.93 %

Temperature = 28.59 °C
Humidity    = 35.94 %

Temperature = 28.59 °C
Humidity    = 35.91 %

...

LPS22HB ReadPressure Example

Arduino
#include <Arduino_LPS22HB.h>

void setup() {
  Serial.begin(9600);
  while (!Serial);

  if (!BARO.begin()) {
    Serial.println("Failed to initialize pressure sensor!");
    while (1);
  }
}

void loop() {
  // read the sensor value
  float pressure = BARO.readPressure();

  // print the sensor value
  Serial.print("Pressure = ");
  Serial.print(pressure);
  Serial.println(" kPa");

  // print an empty line
  Serial.println();

  // wait 1 second to print again
  delay(1000);
}

LPS22HB ReadPressure Example Output

Plain text
Pressure = 90.25 kPa

Pressure = 90.25 kPa

Pressure = 90.25 kPa

Pressure = 90.25 kPa

...

MP34DT05-A PDMSerialPlotter Example

Arduino
#include <PDM.h>

// buffer to read samples into, each sample is 16-bits
short sampleBuffer[256];

// number of samples read
volatile int samplesRead;

void setup() {
  Serial.begin(9600);
  while (!Serial);

  // configure the data receive callback
  PDM.onReceive(onPDMdata);

  // optionally set the gain, defaults to 20
  // PDM.setGain(30);

  // initialize PDM with:
  // - one channel (mono mode)
  // - a 16 kHz sample rate
  if (!PDM.begin(1, 16000)) {
    Serial.println("Failed to start PDM!");
    while (1);
  }
}

void loop() {
  // wait for samples to be read
  if (samplesRead) {

    // print samples to the serial monitor or plotter
    for (int i = 0; i < samplesRead; i++) {
      Serial.println(sampleBuffer[i]);
    }

    // clear the read count
    samplesRead = 0;
  }
}

void onPDMdata() {
  // query the number of bytes available
  int bytesAvailable = PDM.available();

  // read into the sample buffer
  PDM.read(sampleBuffer, bytesAvailable);

  // 16-bit, 2 bytes per sample
  samplesRead = bytesAvailable / 2;
}

PDMSerialPlotter Example

Arduino
#include <PDM.h>

// buffer to read samples into, each sample is 16-bits
short sampleBuffer[256];

// number of samples read
volatile int samplesRead;

void setup() {
  Serial.begin(9600);
  while (!Serial);

  // configure the data receive callback
  PDM.onReceive(onPDMdata);

  // optionally set the gain, defaults to 20
  // PDM.setGain(30);

  // initialize PDM with:
  // - one channel (mono mode)
  // - a 16 kHz sample rate
  if (!PDM.begin(1, 16000)) {
    Serial.println("Failed to start PDM!");
    while (1);
  }
}

void loop() {
  // wait for samples to be read
  if (samplesRead) {

    // print samples to the serial monitor or plotter
    for (int i = 0; i < samplesRead; i++) {
      Serial.println(sampleBuffer[i]);
    }

    // clear the read count
    samplesRead = 0;
  }
}

void onPDMdata() {
  // query the number of bytes available
  int bytesAvailable = PDM.available();

  // read into the sample buffer
  PDM.read(sampleBuffer, bytesAvailable);

  // 16-bit, 2 bytes per sample
  samplesRead = bytesAvailable / 2;
}

Arduino APDS-9960 FullExample.ino

Arduino
#include <Arduino_APDS9960.h>

void setup() {
  Serial.begin(9600);
  while (!Serial); // Wait for serial monitor to open

  if (!APDS.begin()) {
    Serial.println("Error initializing APDS9960 sensor.");
    while (true); // Stop forever
  }
}

int proximity = 0;
int r = 0, g = 0, b = 0;
unsigned long lastUpdate = 0;

void loop() {

  // Check if a proximity reading is available.
  if (APDS.proximityAvailable()) {
    proximity = APDS.readProximity();
  }

  // check if a gesture reading is available
  if (APDS.gestureAvailable()) {
    int gesture = APDS.readGesture();
    switch (gesture) {
      case GESTURE_UP:
        Serial.println("Detected UP gesture");
        break;

      case GESTURE_DOWN:
        Serial.println("Detected DOWN gesture");
        break;

      case GESTURE_LEFT:
        Serial.println("Detected LEFT gesture");
        break;

      case GESTURE_RIGHT:
        Serial.println("Detected RIGHT gesture");
        break;

      default:
        // ignore
        break;
    }
  }

  // check if a color reading is available
  if (APDS.colorAvailable()) {
    APDS.readColor(r, g, b);
  }

  // Print updates every 100ms
  if (millis() - lastUpdate > 100) {
    lastUpdate = millis();
    Serial.print("PR=");
    Serial.print(proximity);
    Serial.print(" rgb=");
    Serial.print(r);
    Serial.print(",");
    Serial.print(g);
    Serial.print(",");
    Serial.println(b);
  }
}

APDS-9960 sensor output

Plain text
PR=248 rgb=6,5,4
PR=250 rgb=6,5,5
PR=252 rgb=6,5,5
PR=253 rgb=6,5,4
PR=252 rgb=6,5,5
PR=250 rgb=6,5,5
PR=253 rgb=6,5,4
PR=251 rgb=6,5,4
...

LSM9DS1 SimpleAccelerometer Example

Arduino
#include <Arduino_LSM9DS1.h>

void setup() {
  Serial.begin(9600);
  while (!Serial);
  Serial.println("Started");

  if (!IMU.begin()) {
    Serial.println("Failed to initialize IMU!");
    while (1);
  }

  Serial.print("Accelerometer sample rate = ");
  Serial.print(IMU.accelerationSampleRate());
  Serial.println(" Hz");
  Serial.println();
  Serial.println("Acceleration in G's");
  Serial.println("X\tY\tZ");
}

void loop() {
  float x, y, z;

  if (IMU.accelerationAvailable()) {
    IMU.readAcceleration(x, y, z);

    Serial.print(x);
    Serial.print('\t');
    Serial.print(y);
    Serial.print('\t');
    Serial.println(z);
  }
}

LSM9DS1 SimpleGyroscope Example

Arduino
#include <Arduino_LSM9DS1.h>

void setup() {
  Serial.begin(9600);
  while (!Serial);
  Serial.println("Started");

  if (!IMU.begin()) {
    Serial.println("Failed to initialize IMU!");
    while (1);
  }
  Serial.print("Gyroscope sample rate = ");
  Serial.print(IMU.gyroscopeSampleRate());
  Serial.println(" Hz");
  Serial.println();
  Serial.println("Gyroscope in degrees/second");
  Serial.println("X\tY\tZ");
}

void loop() {
  float x, y, z;

  if (IMU.gyroscopeAvailable()) {
    IMU.readGyroscope(x, y, z);

    Serial.print(x);
    Serial.print('\t');
    Serial.print(y);
    Serial.print('\t');
    Serial.println(z);
  }
}

LSM9DS1 SimpleMagnetometer Example

Arduino
#include <Arduino_LSM9DS1.h>

void setup() {
  Serial.begin(9600);
  while (!Serial);
  Serial.println("Started");

  if (!IMU.begin()) {
    Serial.println("Failed to initialize IMU!");
    while (1);
  }
  Serial.print("Magnetic field sample rate = ");
  Serial.print(IMU.magneticFieldSampleRate());
  Serial.println(" uT");
  Serial.println();
  Serial.println("Magnetic Field in uT");
  Serial.println("X\tY\tZ");
}

void loop() {
  float x, y, z;

  if (IMU.magneticFieldAvailable()) {
    IMU.readMagneticField(x, y, z);

    Serial.print(x);
    Serial.print('\t');
    Serial.print(y);
    Serial.print('\t');
    Serial.println(z);
  }
}

BLE Peripheral/LED.ino

Arduino
#include <ArduinoBLE.h>

BLEService ledService("19B10000-E8F2-537E-4F6C-D104768A1214"); // BLE LED Service

// BLE LED Switch Characteristic - custom 128-bit UUID, read and writable by central
BLEByteCharacteristic switchCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);

const int ledPin = LED_BUILTIN; // pin to use for the LED

void setup() {
  Serial.begin(9600);
  while (!Serial);

  // set LED pin to output mode
  pinMode(ledPin, OUTPUT);

  // begin initialization
  if (!BLE.begin()) {
    Serial.println("starting BLE failed!");

    while (1);
  }

  // set advertised local name and service UUID:
  BLE.setLocalName("LED");
  BLE.setAdvertisedService(ledService);

  // add the characteristic to the service
  ledService.addCharacteristic(switchCharacteristic);

  // add service
  BLE.addService(ledService);

  // set the initial value for the characeristic:
  switchCharacteristic.writeValue(0);

  // start advertising
  BLE.advertise();

  Serial.println("BLE LED Peripheral");
}

void loop() {
  // listen for BLE peripherals to connect:
  BLEDevice central = BLE.central();

  // if a central is connected to peripheral:
  if (central) {
    Serial.print("Connected to central: ");
    // print the central's MAC address:
    Serial.println(central.address());

    // while the central is still connected to peripheral:
    while (central.connected()) {
      // if the remote device wrote to the characteristic,
      // use the value to control the LED:
      if (switchCharacteristic.written()) {
        if (switchCharacteristic.value()) {   // any value other than 0
          Serial.println("LED on");
          digitalWrite(ledPin, HIGH);         // will turn the LED on
        } else {                              // a 0 value
          Serial.println(F("LED off"));
          digitalWrite(ledPin, LOW);          // will turn the LED off
        }
      }
    }

    // when the central disconnects, print it out:
    Serial.print(F("Disconnected from central: "));
    Serial.println(central.address());
  }
}

Mbed control LED

Arduino
#include "mbed.h"

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  wait_ms(1000);               
  digitalWrite(LED_BUILTIN, LOW);    
  wait_ms(1000);                      
}

Mbed Threading

Arduino
#include <mbed.h>
#include <rtos.h>

using namespace rtos;

Thread blinker;

void blink() {
  while (true) {
    digitalWrite(LED_BUILTIN, HIGH);
    thread_sleep_for(1000);
    digitalWrite(LED_BUILTIN, LOW);
    thread_sleep_for(1000);
  }
}

void setup() {  
  pinMode(LED_BUILTIN, OUTPUT);
  blinker.start(mbed::callback(blink));
}

void loop() {}

Credits

Gilbert Tanner

Gilbert Tanner

1 project • 3 followers

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