Circuit Documentation
Summary of the Circuit
This circuit integrates an ESP32 microcontroller with a YF-S201 Water Flow Meter and a 0.96" OLED display, powered by a Breadboard Power Module capable of providing both 3.3V and 5V outputs. The ESP32 is responsible for processing the signal from the water flow meter and displaying the flow rate on the OLED screen. The power module ensures that all components receive the correct voltage levels for operation.
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 of the circuit, reading sensor data, and controlling the OLED display.
YF-S201 Water Flow Meter
- Description: A sensor that measures the flow rate of water passing through it, providing a pulse output.
- Purpose: To measure the water flow rate and provide this information to the ESP32.
Breadboard Power Module (3.3/5V)
- Description: A module that provides regulated 3.3V and 5V power supply outputs, suitable for breadboard use.
- Purpose: To distribute power to the components on the breadboard.
0.96" OLED
- Description: A small display that uses organic light-emitting diodes to show information.
- Purpose: To display the water flow rate or other data processed by the ESP32.
Wiring Details
ESP32 (30 pin)
- GND: Connected to the ground rail of the power module and the GND pin of the OLED display.
- Vin: Connected to the positive rail of the power module.
- 3V3: Provides 3.3V to the VDD pin of the OLED display.
- D23 (SDA): Connected to the SDA pin of the OLED display for I2C data communication.
- D21 (SCK): Connected to the SCK pin of the OLED display for I2C clock signal.
- D15 (SIG): Connected to the SIG pin of the YF-S201 Water Flow Meter to receive flow rate pulses.
YF-S201 Water Flow Meter
- SIG: Connected to the D15 pin on the ESP32 to send flow rate pulses.
- GND: Connected to the ground rail of the power module.
- VCC: Connected to the positive rail of the power module.
Breadboard Power Module (3.3/5V)
- + (VCC 5V): Provides 5V to the Vin pin of the ESP32 and VCC pin of the water flow meter.
- - (GND): Connected to the GND pins of the ESP32, OLED display, and water flow meter to complete the circuit.
0.96" OLED
- GND: Connected to the ground rail of the power module.
- VDD: Connected to the 3V3 pin of the ESP32.
- SCK: Connected to the D21 pin of the ESP32 for I2C clock signal.
- SDA: Connected to the D23 pin of the ESP32 for I2C data communication.
Documented Code
Since no code was provided in the input, this section is left blank. When code is available, it should be documented here with explanations of how it interfaces with the hardware components, any libraries used, and the logic behind the main functions and routines.