WiFi Water Flow Meter Design


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.
I’ll build the full ESP32-based WiFi water flow meter schematic: first I’ll set the project name/spec, select the power, ESP32, RS485, USB-C, and protection components, then wire and verify the design against datasheets/review checks.

ESP32 WiFi Water Flow Meter

ESP32 WiFi Water Flow Meter thumbnail