Low-Power Flood/Freeze Detector Reference Design With Sub-1 GHz and 10-Year Coin Cell Battery Life


Design files


This reference design uses Texas Instruments low-power consumption digital dual temperature and humidity sensors and the SimpleLink™ ultra-low power Sub-1 GHz wireless microcontroller (MCU) platform to demonstrate a flood and freeze detector with extremely long battery life and no wiring required.

  • Ultra-low-power design resulting in 10-year battery life from single CR2032 coin cell
  • Conductive water sensing always powered on to enable continuous monitoring
  • Designed for SimpleLink™ Sub-1 GH CC1310 wireless microcontroller (MCU) LaunchPad™ development kit (LAUNCHXL-CC1310)
  • Ability to take high-resolution temperature and humidity data
  • Simple design that leads to lower cost

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDG3.PDF (6567 K)

Reference design overview and verified performance test data

TIDUDD1.PDF (22195 K)

Reference design overview and verified performance test data

TIDRT70.PDF (797 K)

Detailed schematic diagram for design layout and components

TIDRT71.PDF (66 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRT72.PDF (97 K)

Detailed overview of design layout for component placement

TIDRT74.ZIP (795 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRT73.PDF (675 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

ESD & surge protection ICs

TPD1E10B0612-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet document-pdfAcrobat PDF open-in-new HTML
Humidity sensors

HDC20102% RH ultra-small, low-power digital relative humidity sensor

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Low-Power Flood and Freeze Detector Reference Design Oct. 17, 2017
Design guide Fire, CO Alarm Detector Ref Design w/ Low BOM Cost and Integrated Battery Backup Oct. 10, 2017

Related design resources

Hardware development

LAUNCHXL-CC1310 SimpleLink™ Sub-1 GHz CC1310 wireless MCU LaunchPad™ development kit

Reference designs

TIDA-01476 Low Power Wireless PIR Motion Detector Reference Design Enabling Sensor-to-Cloud Networks TIDA-01519 Fire & Carbon Monoxide Alarm Detector Reference Design with Low BOM Cost & Integrated Battery Backup

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