Flow Measurement Reference Design with Reed Switches and BLE
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Key Document


TIDM-BLE-REEDMTR is an elegant single chip reference design with minimal component count to transform a mechanical water or gas meter into a smart meter. This system consumes less than 11uA in standby mode, with RF connection in every 5 seconds. The total mechanical gear counter can be replaced by two Reed switches, eliminating the process to redesign the existing casing. The Reed switches are controlled by the low-power sensor controller engine of the CC2650 SimpleLink™ wireless MCU. Bluetooth Low Energy (BLE) communications provide the users with the ability to read the meter via a smart phone or PC at any time within 10 meters. The software package of this reference design provides a fast setup of the CC2650  and a custom profile for the BLE application.

  • Less than 11uA Standby Current for both Bluetooth Connected and Advertising Mode
  • 9-yr system operation with Button Cell Battery
  • SimpleLink™ Bluetooth CC2650 wireless MCU provides a single chip solution for measurement and communications
  • Two Reed Switches for Rotational Detection

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Schematic/Block Diagram

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CC2650  SimpleLink™ 32-bit Arm Cortex-M3 multiprotocol 2.4 GHz wireless MCU with 128kB Flash  SimpleLink Solutions  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CC2650 Download Download
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Technical Documents

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Application notes (1)
Title Type Size (KB) Date
PDF 8634 10 Jan 2019
User guides (1)
Title Type Size (KB) Date
PDF 819 11 Dec 2015
Design files (6)
Title Type Size (KB) Date
ZIP 173 14 Dec 2015
ZIP 791 14 Dec 2015
ZIP 1194 14 Dec 2015
ZIP 85 14 Dec 2015
PDF 91 14 Dec 2015
ZIP 326 14 Dec 2015
More literature (2)
Title Type Size (KB) Date
PDF 724 05 Nov 2015
PDF 2312 10 Feb 2015
Related Tools & Software

Reference Designs  ( 2 )

Name Part Number Tool Type
Ultrasonic Water Flow Meter Design using Time to Digital Conversion  TIDM-ULTRASONIC-FLOW-TDC  TI Designs
Water Meter Reference Design for two LC Sensors, Using Extended Scan Interface (ESI)  TIDM-LC-WATERMTR  TI Designs

Software (1)

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