Design with Arduino® Nano 33 BLE Sense Rev2 in Cirkit DesignerThe Arduino® Nano 33 BLE Sense Rev2 is a compact microcontroller board designed for advanced IoT applications and sensor-based projects. Manufactured by Arduino, this board features Bluetooth Low Energy (BLE) connectivity, a range of built-in sensors, and compatibility with the Arduino ecosystem. Its small form factor and powerful capabilities make it ideal for applications such as environmental monitoring, wearable devices, and smart home systems.
This circuit consists of an Arduino Nano 33 BLE microcontroller connected to an infrared (IR) sensor. The IR sensor's output pin is connected to the D7 digital input pin on the Nano, allowing the microcontroller to read the sensor's signal. The sensor is powered by the 3.3V output from the Nano, and both the sensor and the Nano share a common ground connection.
Open Project in Cirkit Designer
This circuit features an Arduino Nano interfaced with a BNO055 sensor and an HC-05 Bluetooth module. The Arduino communicates with the BNO055 via I2C (using A4 for SDA and A5 for SCL) and with the HC-05 via serial communication (using D0/RX and D1/TX for data transfer). The HC-05's Key and State pins are connected to D2 and D3 of the Arduino for module control, and all components share a common ground with the Arduino powered at 5V and the BNO055 at 3.3V from the Arduino's 3V3 output.
Open Project in Cirkit Designer
This circuit consists of an Arduino UNO and an Arduino Nano, which communicate via Bluetooth modules. The Arduino Nano reads data from two flex sensors and an MPU-6050 accelerometer, sending the data to the Arduino UNO. The Arduino UNO controls three micro servos through a PCA9685 PWM driver, moving them back and forth.
Open Project in Cirkit Designer
This circuit is a multi-sensor data acquisition system using an Arduino Nano. It integrates a DHT11 sensor for temperature and humidity, a heart pulse sensor, a GPS module for location data, and an HC-05 Bluetooth module for wireless communication. The Arduino Nano collects data from these sensors and can transmit it via Bluetooth.
Open Project in Cirkit DesignerThe Arduino Nano 33 BLE Sense Rev2 is equipped with a powerful Nordic nRF52840 microcontroller and a variety of onboard sensors. Below are the key technical details:
| Feature | Specification |
|---|---|
| Microcontroller | Nordic nRF52840 (ARM Cortex-M4 @ 64 MHz) |
| Operating Voltage | 3.3V |
| Input Voltage (VIN) | 5V (via USB or VIN pin) |
| Digital I/O Pins | 14 (12 PWM capable) |
| Analog Input Pins | 8 |
| Flash Memory | 1 MB |
| SRAM | 256 KB |
| Clock Speed | 64 MHz |
| Connectivity | Bluetooth Low Energy (BLE) 5.0, NFC |
| Dimensions | 45 x 18 mm |
| Sensor Type | Model/Technology | Description |
|---|---|---|
| IMU (Inertial Measurement Unit) | LSM9DS1 | 9-axis motion sensor (accelerometer, gyroscope, magnetometer) |
| Microphone | MP34DT05-A | Digital omnidirectional microphone |
| Temperature and Humidity | HTS221 | Measures ambient temperature and humidity |
| Barometric Pressure | LPS22HB | Measures atmospheric pressure |
| Gesture and Proximity | APDS-9960 | Detects gestures, proximity, and ambient light |
| Pin Name | Description |
|---|---|
| VIN | Input voltage (5V) for powering the board |
| 3.3V | Regulated 3.3V output |
| GND | Ground connection |
| Digital Pins 0-13 | General-purpose digital I/O pins (PWM capable on specific pins) |
| Analog Pins A0-A7 | Analog input pins |
| I2C (SDA, SCL) | I2C communication pins (shared with A4 and A5) |
| SPI (MISO, MOSI, SCK) | SPI communication pins |
| UART (RX, TX) | Serial communication pins |
| RESET | Resets the microcontroller |
Powering the Board:
Programming the Board:
Connecting Sensors:
BLE Communication:
ArduinoBLE library to enable Bluetooth Low Energy communication.The following example demonstrates how to read data from the onboard HTS221 temperature and humidity sensor:
#include <Arduino_HTS221.h> // Include the library for the HTS221 sensor
void setup() {
Serial.begin(9600); // Initialize serial communication at 9600 baud
while (!Serial); // Wait for the serial monitor to open
// Initialize the HTS221 sensor
if (!HTS.begin()) {
Serial.println("Failed to initialize HTS221 sensor!");
while (1); // Halt execution if initialization fails
}
Serial.println("HTS221 sensor initialized successfully.");
}
void loop() {
// Read temperature and humidity values
float temperature = HTS.readTemperature();
float humidity = HTS.readHumidity();
// Print the values to the serial monitor
Serial.print("Temperature: ");
Serial.print(temperature);
Serial.println(" °C");
Serial.print("Humidity: ");
Serial.print(humidity);
Serial.println(" %");
delay(1000); // Wait for 1 second before reading again
}
Board Not Detected by Arduino IDE:
BLE Connection Fails:
ArduinoBLE library is correctly initialized in your sketch.Sensor Readings Are Inaccurate:
Q: Can I use the Arduino Nano 33 BLE Sense Rev2 with a battery?
A: Yes, you can power the board using a 3.7V LiPo battery connected to the VIN and GND pins. Ensure the battery voltage is regulated to avoid damage.
Q: Is the board compatible with Arduino shields?
A: The Nano 33 BLE Sense Rev2 is not directly compatible with standard Arduino shields due to its smaller form factor. However, you can use breakout boards or custom wiring for compatibility.
Q: Can I use this board for machine learning applications?
A: Yes, the board supports TinyML applications. Use libraries like TensorFlow Lite for Microcontrollers to deploy machine learning models.
Q: How do I update the firmware?
A: Firmware updates can be performed via the Arduino IDE or using the nRF Connect tool. Follow the instructions provided on the Arduino website for detailed steps.