Home awareness · Available now

Smart Leak Sensor

A rechargeable, ESP32-based moisture detector that wakes immediately when water is detected and reports the leak to Home Assistant through ESPHome. Use the included reference configuration as-is or customize it as a practical introduction to low-power smart-home sensing.

Buy on Amazon Buy on eBay

Purchases are completed on the selected marketplace. Price, shipping, returns, and seller terms are shown there.

PRODUCT GALLERY

See Leak Sensor in detail.

Smart Leak Sensor: leak detector under kitchen sink — leak detector under kitchen sink

Smart Leak Sensor: leak detector feature overview — leak detector feature overview

Smart Leak Sensor: leak detector example uses collage — leak detector example uses collage

Smart Leak Sensor: leak detector under bathroom sink — leak detector under bathroom sink

Smart Leak Sensor: leak detector under dishwasher — leak detector under dishwasher

Smart Leak Sensor: leak detector under washing machine — leak detector under washing machine

Smart Leak Sensor: leak detector under water heater — leak detector under water heater

Smart Leak Sensor: leak detector behind toilet — leak detector behind toilet

Smart Leak Sensor: leak detector broken plant pot — leak detector broken plant pot

01 / WHY IT MATTERS

Catch leaks early—and learn exactly how your sensor works.

Fast, useful detection

The sensor stays in energy-saving deep sleep, then wakes immediately when moisture is detected so Home Assistant can turn the reading into alerts, dashboards, and automations.

Protect vulnerable spaces

Place it near sinks, water heaters, dishwashers, washing machines, plumbing fixtures, plant pots, or other indoor areas where an unnoticed leak could cause damage.

Made to customize

The included ESPHome YAML is fully customizable and demonstrates deep sleep, moisture-triggered wake-up, Home Assistant reporting, battery monitoring, and programmable LED indications.

Learn with a real device

Step-by-step setup and educational documentation make this a practical ESP32 and ESPHome project for makers, DIYers, students, and Home Assistant users.

02 / TECHNICAL DETAILS

Built for the system
you already use.

Platform: ESP32 with customizable ESPHome firmware
Integration: Native Home Assistant integration through ESPHome
Detection: Immediate wake from deep sleep when moisture is detected
Monitoring: Battery percentage and voltage reporting
Status: Programmable LED indications
Connectivity: Wi-Fi
Power: USB-C rechargeable; requires one 18650 3000 mAh lithium-ion battery
Battery: Sold separately
Included: 3D-printed case, reference ESPHome YAML, and step-by-step documentation
Location: Indoor use
Requirements: Wi-Fi network and Home Assistant installation with ESPHome
Availability: Amazon and eBay

03 / PRODUCT SUPPORT

Support that grows with the product.

Find setup guidance, safety information, troubleshooting, downloads, warranty details, and release notes for your product.

Support