Circuit Documentation

Summary

The circuit in question is designed to interface various sensors and output devices with an ESP32 microcontroller. The ESP32 serves as the central processing unit, reading sensor data, controlling a buzzer, and displaying information on an OLED display. The sensors include a SW-420 Vibration Sensor and a Sound Sensor for detecting physical and sound changes in the environment, respectively. A DHT11 sensor is used for measuring temperature and humidity. The OLED display provides a user interface for data visualization. A buzzer is included for audible alerts. The circuit is powered by a 3.7V power source.

Component List

ESP32

• Microcontroller with WiFi and Bluetooth capabilities.
• It has a variety of digital and analog pins for interfacing with peripherals.

SW-420 Vibration Sensor

• Detects vibrations and outputs a digital signal.

Sound Sensor

• Detects sound levels and provides both analog and digital outputs.

DHT11

• A sensor for measuring temperature and humidity, providing a digital output.

Buzzer

• An audible signaling device that can be controlled digitally.

OLED 1.3" Display

• A small display for showing text and graphics, interfaced via I2C.

3.7V Power Source

• Provides power to the circuit.

Wiring Details

ESP32

• D34 connected to Sound Sensor Analog output.
• D35 connected to SW-420 Vibration Sensor Digital output.
• D26 connected to Buzzer PIN.
• D13 connected to DHT11 DATA.
• GND connected to common ground.
• VIN connected to 3.7V power source.
• D21 (SDA) and D22 (SCL) connected to OLED 1.3" Display for I2C communication.

SW-420 Vibration Sensor

• vcc connected to 3.7V power source.
• Ground connected to common ground.
• Digital output connected to ESP32 D35.

Sound Sensor

• Analog connected to ESP32 D34.
• GND connected to common ground.
• VCC connected to 3.7V power source.

DHT11

• DATA connected to ESP32 D13.
• GND connected to common ground.
• VCC connected to 3.7V power source.

Buzzer

• PIN connected to ESP32 D26.
• GND connected to common ground.

OLED 1.3" Display

• GND connected to common ground.
• VCC connected to 3.7V power source.
• SCL connected to ESP32 D22.
• SDA connected to ESP32 D21.

3.7V Power Source

• + connected to VIN on ESP32 and VCC on all other components.
• - connected to common ground.

Documented Code

No code has been provided for the microcontroller. The documentation of the code would typically include descriptions of the functions, initialization routines, main loop, and any interrupt service routines. It would also detail how the microcontroller interacts with each sensor and output device, including data acquisition, processing, and response actions.