WiFi Water Flow Meter Design

flux

PCB layout placement is complete so far.
What I completed:
  • Resized the board to 100 mm × 80 mm with rounded corners.
  • Set a 4-layer stackup for better ESP32 RF grounding, cleaner power routing, and easier RS485/power routing.
  • Placed all 40 physical components on the top layer.
  • Put:
    • USB-C input/protection on the left edge.
    • ESP32 module near the top edge with antenna facing outward.
    • 12V boost converter near the sensor power connector.
    • RS485 interface near the RS485 field connector.
    • J2/J3 sensor connectors on the right edge.
    • UART programming header and LEDs along the bottom edge.
    • Decoupling/support passives close to their ICs.
Current review state:
  • Placement has no reported component overlap or board-boundary issue.
  • The remaining layout errors are airwires, which are expected because routing has not been performed yet.
What remains:
  • Review the placement visually.
  • If you approve the placement, the next step is PCB routing.
  • After routing, run final DRC and fix any routing/clearance issues.
Route with constraints
Check placement DRC
Adjust RS485 connector
Add mounting holes
Review placement view
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  • Generic Inductor
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ESP32 WiFi Water Flow Meter

ESP32 WiFi Water Flow Meter thumbnail
USB-C powered ESP32 WiFi water flow meter interface for a 3/4 inch PVC ultrasonic RS485 flow sensor, including 12V sensor power, 3.3V logic power, protection, status LEDs, and programming/reset support.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$6.54–$8.31

Digi-Key

$13.73–$13.91

HQonline

$2.93–$3.23

LCSC

$11.74–$12.21

Mouser

$20.84–$20.92

TME

$9.20

Verical

$6.55–$8.26

Controls