Arduino Nano-Based Environmental Monitoring System with Bluetooth Connectivity
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Circuit Documentation
Summary
This circuit integrates various sensors and modules with an Arduino Nano microcontroller to perform multiple sensing and communication tasks. The sensors include a BMP280 for atmospheric pressure and temperature measurements, an MPU-6050 for motion tracking, a DHT11 for humidity and temperature, and an MQ-135 for air quality monitoring. A pair of resistors are used, likely for pull-up configurations. Communication is facilitated by an HC-05 Bluetooth module. The Arduino Nano serves as the central processing unit, interfacing with the sensors and the Bluetooth module.
Component List
Arduino Nano
- Microcontroller board based on the ATmega328P
- Offers a variety of digital and analog I/O pins
BMP280
- Digital pressure sensor
- Capable of measuring temperature and atmospheric pressure
MPU-6050
- Motion tracking device
- Includes a 3-axis gyroscope and a 3-axis accelerometer
DHT11 Sensor V2
- Digital temperature and humidity sensor
- Provides reliable readings for environmental monitoring
MQ-135 SENSOR AIR QUALITY
- Gas sensor for detecting a wide range of gases, including NH3, NOx, alcohol, benzene, smoke, and CO2
Resistor (10k Ohms)
- Two resistors with a resistance of 10k Ohms each
- Typically used for pull-up or pull-down applications
HC-05 Bluetooth Module
- Wireless communication module
- Enables Bluetooth connectivity for the circuit
Wiring Details
Arduino Nano
A1connected to MQ-135 SENSOR AIR QUALITYA0D8connected to DHT11 Sensor V2DATD6connected to HC-05 Bluetooth ModuleStateA4connected to Resistor (10k Ohms) and MPU-6050SDAD5connected to HC-05 Bluetooth ModuleTXDA5connected to Resistor (10k Ohms), MPU-6050SCL, and BMP280SCLD4connected to HC-05 Bluetooth ModuleRXD5Vconnected to all VCC pins of the sensors and modulesGNDconnected to all GND pins of the sensors and modules
BMP280
SDOconnected to Arduino Nano5VCSBnot connectedSDAconnected to MPU-6050SDAand Arduino NanoA4SCLconnected to MPU-6050SCL, Arduino NanoA5, and Resistor (10k Ohms)GNDconnected to Arduino NanoGNDVCCconnected to Arduino Nano5V
MPU-6050
VCCconnected to Arduino Nano5VGNDconnected to Arduino NanoGNDSCLconnected to BMP280SCL, Arduino NanoA5, and Resistor (10k Ohms)SDAconnected to BMP280SDAand Arduino NanoA4XDA,XCL,AD0,INTnot connected
DHT11 Sensor V2
GNDconnected to Arduino NanoGNDDATconnected to Arduino NanoD8VCCconnected to Arduino Nano5V
MQ-135 SENSOR AIR QUALITY
VCCconnected to Arduino Nano5VGNDconnected to Arduino NanoGNDA0connected to Arduino NanoA1D0not connected
Resistor (10k Ohms)
- One end connected to Arduino Nano
5V - The other end connected to MPU-6050
SDAand Arduino NanoA4
HC-05 Bluetooth Module
Keynot connectedVCCconnected to Arduino Nano5VTXDconnected to Arduino NanoD5RXDconnected to Arduino NanoD4Stateconnected to Arduino NanoD6GNDconnected to Arduino NanoGND
Documented Code
Arduino Nano Code (sketch.ino)
void setup() {
// put your setup code here, to run once:
}
void loop() {
// put your main code here, to run repeatedly:
}
The provided code is a template with empty setup() and loop() functions, which are the entry points for Arduino sketches. The setup() function is intended for initialization code that runs once at startup, and the loop() function contains the main logic that runs continuously.
Additional Notes
- The
documentation.txtfile is empty and thus not included in the documentation. - The actual functionality of the code will depend on the specific requirements of the circuit's application, which are not provided in the input data.