Circuit Documentation

Summary of the Circuit

This circuit integrates an ESP32 microcontroller with a DS3231 Real-Time Clock (RTC) module. The ESP32 is a versatile microcontroller with Wi-Fi and Bluetooth capabilities, while the DS3231 is a highly accurate RTC with I2C communication interface. The circuit is designed to allow the ESP32 to communicate with the DS3231 to maintain accurate timekeeping, which can be useful in time-sensitive applications.

Component List

ESP32 (30 pin)

• Description: A 30-pin microcontroller with Wi-Fi and Bluetooth capabilities.
• Purpose: Acts as the main processing unit and communicates with the DS3231 RTC to maintain accurate time.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3.

DS3231 RTC

• Description: A real-time clock module that provides accurate timekeeping with an I2C interface.
• Purpose: Maintains the current time and date, providing this information to the ESP32 upon request.
• Pins: 32K, SQW, SCL, SDA, VCC, GND.

Wiring Details

ESP32 (30 pin)

• Vin: Connected to the VCC pin of the DS3231 RTC to provide power.
• D22 (SCL): Connected to the SCL pin of the DS3231 RTC for I2C clock signal.
• D21 (SDA): Connected to the SDA pin of the DS3231 RTC for I2C data signal.
• GND: Connected to the GND pin of the DS3231 RTC to complete the power circuit.

DS3231 RTC

• VCC: Connected to the Vin pin of the ESP32 to receive power.
• SCL: Connected to the D22 pin of the ESP32 for I2C clock signal.
• SDA: Connected to the D21 pin of the ESP32 for I2C data signal.
• GND: Connected to the GND pin of the ESP32 to complete the power circuit.

Documented Code

There is no code provided for the microcontrollers in the circuit. To fully utilize the ESP32 and DS3231 RTC, embedded code is required to initialize the I2C communication and handle the data exchange between the two components. The code would typically include setup routines for the I2C interface, functions to read from and write to the RTC, and logic to process and display the time and date information.

Since no code is provided, this section cannot be completed. However, if code becomes available, it should be documented here with explanations of the functions, setup procedures, and any libraries used to facilitate communication between the ESP32 and the DS3231 RTC.