Circuit Documentation
Summary of the Circuit
The circuit in question appears to be designed for environmental sensing, utilizing a variety of gas sensors and a particulate matter sensor to monitor air quality. The central processing unit for this circuit is an ESP32 microcontroller, which is responsible for interfacing with the sensors and potentially processing and transmitting the sensor data.
Component List
ESP32 (30 pin)
- 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, reading sensor data and controlling sensor operation.
MQ-135 SENSOR AIR QUALITY
- Description: A sensor for detecting a wide range of gases, including NH3, NOx, alcohol, benzene, smoke, and CO2.
- Purpose: To monitor air quality by detecting various gases.
MQ-7 SENSOR CARBON MONOXIDE GAS
- Description: A sensor for detecting carbon monoxide (CO) gas concentrations in the air.
- Purpose: To monitor the presence and concentration of carbon monoxide gas.
DHT22
- Description: A sensor for measuring ambient temperature and humidity.
- Purpose: To provide environmental data on temperature and humidity.
GP2Y1010AU0F
- Description: An optical air quality sensor designed to sense dust particles.
- Purpose: To measure the concentration of particulate matter in the air.
MQ-131 SENSOR OZONE GAS
- Description: A sensor for detecting ozone (O3) gas concentrations in the air.
- Purpose: To monitor the presence and concentration of ozone gas.
Wiring Details
ESP32 (30 pin)
- D34: Connected to MQ-7 SENSOR CARBON MONOXIDE GAS (A0)
- D35: Connected to MQ-131 SENSOR OZONE GAS (A0) and MQ-135 SENSOR AIR QUALITY (A0)
- D32: Connected to GP2Y1010AU0F (Vout)
- D33: Connected to GP2Y1010AU0F (LED)
- D25: Connected to MQ-7 SENSOR CARBON MONOXIDE GAS (D0)
- D26: Connected to MQ-131 SENSOR OZONE GAS (D0) and MQ-135 SENSOR AIR QUALITY (D0)
- D21: Connected to DHT22 (Out)
- GND: Common ground connected to DHT22 (-), MQ-7 SENSOR CARBON MONOXIDE GAS (GND), MQ-135 SENSOR AIR QUALITY (GND), GP2Y1010AU0F (S-GND, LED-GND), and MQ-131 SENSOR OZONE GAS (GND)
- 3V3: Power supply connected to MQ-131 SENSOR OZONE GAS (VCC), DHT22 (+), MQ-7 SENSOR CARBON MONOXIDE GAS (VCC), MQ-135 SENSOR AIR QUALITY (VCC), and GP2Y1010AU0F (VCC, V-LED)
MQ-135 SENSOR AIR QUALITY
- VCC: Connected to ESP32 (3V3)
- GND: Connected to ESP32 (GND)
- A0: Connected to ESP32 (D35)
- D0: Connected to ESP32 (D26)
MQ-7 SENSOR CARBON MONOXIDE GAS
- VCC: Connected to ESP32 (3V3)
- GND: Connected to ESP32 (GND)
- A0: Connected to ESP32 (D34)
- D0: Connected to ESP32 (D25)
DHT22
- +: Connected to ESP32 (3V3)
- Out: Connected to ESP32 (D21)
- -: Connected to ESP32 (GND)
GP2Y1010AU0F
- VCC: Connected to ESP32 (3V3)
- Vout: Connected to ESP32 (D32)
- S-GND: Connected to ESP32 (GND)
- LED: Connected to ESP32 (D33)
- LED-GND: Connected to ESP32 (GND)
- V-LED: Connected to ESP32 (3V3)
MQ-131 SENSOR OZONE GAS
- VCC: Connected to ESP32 (3V3)
- GND: Connected to ESP32 (GND)
- A0: Connected to ESP32 (D35)
- D0: Connected to ESP32 (D26)
Documented Code
No code has been provided for the microcontrollers in the circuit. The documentation of the code would typically include descriptions of the functions, algorithms, and any libraries used to interface with the sensors. It would also detail the logic for reading sensor data, processing it, and any communication protocols used to send the data to other devices or services.