Circuit Documentation

Summary of the Circuit

This circuit integrates an ESP32 microcontroller with an OLED display and two I/O expanders. The ESP32 serves as the central processing unit, controlling the OLED display via I2C communication and interfacing with additional peripherals through the I/O expanders. The OLED display is used for visual output, while the I/O expanders increase the number of available I/O pins for the ESP32, allowing for more complex interactions with external devices or sensors.

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 main controller for the circuit, handling data processing, I/O management, and communication with the OLED display and I/O expanders.

OLED 1.3"

• Description: A small display that uses organic light-emitting diodes to provide visual output.
• Purpose: Displays information and data processed by the ESP32.

I/O 8 pin expander (I2C)

• Description: An integrated circuit that expands the number of I/O pins available to the microcontroller via an I2C interface.
• Purpose: Increases the number of I/O pins for the ESP32, allowing for additional sensors or peripherals to be connected.

Wiring Details

ESP32 38 PINS

• GND: Connected to the ground of the OLED display.
• G22 (SCL): Connected to the SCL pin of the OLED display for I2C communication.
• G21 (SDA): Connected to the SDA pin of the OLED display for I2C communication.
• 5V: Connected to the VCC pin of the OLED display to provide power.

OLED 1.3"

• GND: Connected to the ground pin of the ESP32.
• VCC: Connected to the 5V pin of the ESP32 to receive power.
• SCL: Connected to the G22 pin of the ESP32 for I2C communication.
• SDA: Connected to the G21 pin of the ESP32 for I2C communication.

I/O 8 pin expander (I2C)

• Note: Wiring details for the I/O expanders are not provided in the electrical net list. Please ensure that the SDA and SCL pins are connected to the corresponding I2C pins on the ESP32, and that VCC and GND are connected to the power and ground rails, respectively.

Documented Code

No code has been provided for the microcontrollers in the circuit. To fully utilize the ESP32 and I/O expanders, embedded code is required to initialize and manage I2C communication, handle data processing, and control the OLED display. Please provide the necessary code to complete the documentation.