Circuit Documentation

Summary of the Circuit

This circuit integrates a variety of sensors and modules with an ESP32 microcontroller to perform various sensing and control tasks. The ESP32 serves as the central processing unit, interfacing with an ADXL345 accelerometer, a BME/BMP280 environmental sensor, an HC-SR04 ultrasonic distance sensor, and a DHT22 temperature and humidity sensor. The ESP32 manages data collection from the sensors and can be programmed to respond to the sensor inputs.

Component List

ESP32 - 38 pins

• Description: A microcontroller with Wi-Fi and Bluetooth capabilities, featuring a wide range of GPIO pins.
• Purpose: Acts as the central processing unit for the circuit, interfacing with all sensors and modules.

ADXL345 Keystudio

• Description: A 3-axis accelerometer for measuring acceleration with high resolution.
• Purpose: Provides acceleration data to the ESP32 for motion detection and analysis.

HC-SR04 Ultrasonic Sensor

• Description: An ultrasonic ranging module that measures distance by sending out a sound wave and timing how long it takes to come back.
• Purpose: Measures the distance to objects in front of the sensor and sends this data to the ESP32.

DHT22

• Description: A digital temperature and humidity sensor with a calibrated digital signal output.
• Purpose: Monitors environmental temperature and humidity levels, providing data to the ESP32.

BME/BMP280

• Description: A digital sensor that measures temperature, barometric pressure, and humidity.
• Purpose: Provides additional environmental data to the ESP32 for comprehensive environmental monitoring.

Wiring Details

ESP32 - 38 pins

• 3V3 connected to:
  • VIN on BME/BMP280
  • 3.3V on ADXL345 Keystudio
• GND connected to:
  • GND on BME/BMP280
  • GND on HC-SR04 Ultrasonic Sensor
  • GND on ADXL345 Keystudio
  • GND on DHT22
• 5V connected to:
  • VCC on HC-SR04 Ultrasonic Sensor
  • VCC on DHT22
• G23 connected to TRIG on HC-SR04 Ultrasonic Sensor
• G22 connected to:
  • SCL on BME/BMP280
  • SCL on ADXL345 Keystudio
• G21 connected to:
  • SDA on BME/BMP280
  • SDA on ADXL345 Keystudio
• G19 connected to ECHO on HC-SR04 Ultrasonic Sensor
• G4 connected to DAT on DHT22

ADXL345 Keystudio

• 3.3V and GND connected to ESP32
• SDA and SCL connected to ESP32 for I2C communication

HC-SR04 Ultrasonic Sensor

• VCC connected to 5V on ESP32
• GND connected to GND on ESP32
• TRIG connected to G23 on ESP32
• ECHO connected to G19 on ESP32

DHT22

• VCC connected to 5V on ESP32
• GND connected to GND on ESP32
• DAT connected to G4 on ESP32

BME/BMP280

• VIN connected to 3V3 on ESP32
• GND connected to GND on ESP32
• SCL and SDA connected to ESP32 for I2C communication

Documented Code

No code was provided for the microcontrollers in the circuit. To fully utilize the circuit's capabilities, embedded code should be written and uploaded to the ESP32 microcontroller. The code should initialize and read from the connected sensors, process the data as required, and perform any control actions or communications as per the application's needs.