Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, a MAX30100 pulse oximeter sensor, a 16x2 I2C LCD display, and a buzzer. The circuit is designed to measure and display pulse and oxygen levels, and it includes an alert mechanism using a buzzer.

Component List

1. MAX30100

   • Description: Pulse oximeter and heart-rate sensor.
   • Pins: VIN, SDA, SCL, GND, RD, IRD, INT

2. ESP32

   • Description: 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

3. 16x2 I2C LCD

   • Description: 16x2 character LCD display with I2C interface.
   • Pins: GND, VCC, SDA, SCL

4. Buzzer

   • Description: Simple piezoelectric buzzer.
   • Pins: PIN, GND

Wiring Details

MAX30100

• VIN: Connected to ESP32 VIN
• SDA: Connected to ESP32 D2
• SCL: Connected to ESP32 D4
• GND: Connected to ESP32 GND

ESP32

• GND: Connected to Buzzer GND, 16x2 I2C LCD GND
• VIN: Connected to MAX30100 VIN, 16x2 I2C LCD VCC
• D2: Connected to MAX30100 SDA
• D4: Connected to MAX30100 SCL
• D5: Connected to Buzzer PIN
• D21: Connected to 16x2 I2C LCD SDA
• D22: Connected to 16x2 I2C LCD SCL

16x2 I2C LCD

• GND: Connected to ESP32 GND
• VCC: Connected to ESP32 VIN
• SDA: Connected to ESP32 D21
• SCL: Connected to ESP32 D22

Buzzer

• PIN: Connected to ESP32 D5
• GND: Connected to ESP32 GND

Code

No code is provided for this circuit.

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This documentation provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code section. Each component is described, and the wiring details ensure proper connections for the circuit to function as intended.