Design a WiFi-enabled water flow meter for a 3/4" PVC pipe with the following specifications:
Project Requirements
Power Input
- USB-C: 5V (15W) power input with appropriate protection circuitry
Connectivity
- WiFi Module: ESP32 or similar for wireless connectivity and data transmission
Sensing
- Ultrasonic Flow Sensor: External ultrasonic sensor suitable for 3/4" PVC pipe
- Measure flow rate and total volume
- Sensor is powered with 12V and outputs RS485
Power Management
- Voltage Regulation: 3.3V regulator for powering the ESP32 and sensor
- Protection: Reverse polarity protection, ESD protection, and decoupling capacitors
Supporting Components
- Programming Interface: UART header for firmware updates
- Status Indicators: LEDs for power, WiFi connection, and flow detection
- Reset Circuit: Proper enable/reset network for the microcontroller
Request
Generate a complete schematic with all necessary components, including the power supply, microcontroller, sensor interface, and supporting circuitry.