Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a DHT11 temperature and humidity sensor, a BME/BMP280 pressure sensor, a MAX30102 heart rate and oxygen sensor, and a buzzer. The document includes a component list, wiring details, and code documentation.

Component List

1. ESP32

   • Description: A powerful microcontroller with Wi-Fi and Bluetooth capabilities.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT

2. DHT11

   • Description: A basic, low-cost digital temperature and humidity sensor.
   • Pins: VCC, GND, DATA

3. BME/BMP280

   • Description: A combined digital pressure, humidity, and temperature sensor.
   • Pins: GND, SCL, SDA, VIN

4. MAX30102 Heart Rate and Oxygen Sensor

   • Description: A sensor module for measuring heart rate and blood oxygen levels.
   • Pins: VIN, SCL, SDA, INT, IRQ, RD, GND

5. Buzzer

   • Description: An audio signaling device.
   • Pins: PIN, GND

Wiring Details

ESP32

• D14 is connected to PIN of the Buzzer.
• GND is connected to GND of the Buzzer.
• 3V3 is connected to:
  • VCC of the DHT11
  • VIN of the BME/BMP280
  • VIN of the MAX30102 Heart Rate and Oxygen Sensor
• GND is connected to:
  • GND of the DHT11
  • GND of the BME/BMP280
  • GND of the MAX30102 Heart Rate and Oxygen Sensor
• D4 is connected to DATA of the DHT11.
• D21 is connected to:
  • SCL of the BME/BMP280
  • SCL of the MAX30102 Heart Rate and Oxygen Sensor
• D22 is connected to:
  • SDA of the BME/BMP280
  • SDA of the MAX30102 Heart Rate and Oxygen Sensor

DHT11

• VCC is connected to 3V3 of the ESP32.
• GND is connected to GND of the ESP32.
• DATA is connected to D4 of the ESP32.

BME/BMP280

• VIN is connected to 3V3 of the ESP32.
• GND is connected to GND of the ESP32.
• SCL is connected to D21 of the ESP32.
• SDA is connected to D22 of the ESP32.

MAX30102 Heart Rate and Oxygen Sensor

• VIN is connected to 3V3 of the ESP32.
• GND is connected to GND of the ESP32.
• SCL is connected to D21 of the ESP32.
• SDA is connected to D22 of the ESP32.

Buzzer

• PIN is connected to D14 of the ESP32.
• GND is connected to GND of the ESP32.

Code Documentation

There is no code provided for this circuit.