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Connected Weight Scale Demonstration

PIC16F178x MCU Family with Intelligent Analog and RN42 Bluetooth® Module

Weight scales have been used for quite a while in homes, businesses and medical facilities. With the increase in demand for health-related information, connected weight scales can now send data to smartphones, tablets and the Cloud where it can be utilized by medical providers and other care givers. Connected weight scales are being used with other home-based consumer and medical devices to improve the health and general well-being of many people.

Our Connected Weight Scale Demonstration Board shows the implementation of a Bluetooth®-connected weight scale using the PIC16F1783 microcontroller (MCU) and the RN42 Bluetooth module. The PIC16F1783—a cost-effective, eXtreme Low Power (XLP) 8-bit MCU—features an integrated capacitive touch sensing module, 12-bit Analog-to-Digital Converter (ADC) and operational amplifiers.

Connectivity is demonstrated on this board using our fully qualified RN42 Bluetooth 2.1 + EDR module. This demo design can also be easily implemented using any of our Bluetooth Low Energy or Wi-Fi® connectivity modules.

Connected Weight Scale Demo Design Files

Start with the free download of the schematics and 'C' source code that can easily be modified to your specific application needs.

This demo is not for sale. Please download the design files for your evaluation and prototype development.

This reference design helps you develop low-cost, connected digital weight scale functionality.*

*Microchip medical reference designs and demos are intended for evaluation and development purposes only. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use.

Download 'C' Source Code
Download Schematics

System Diagram

Demonstration Highlights

  • Displays instructions to user and measures weight in pounds and kilograms
  • Bluetooth module is used to demonstrate smartphone/tablet connected design capability
  • Low overall BOM cost due to function integration
  • Low-power operation utilizing eXtreme Low Power PIC16F1783 MCU
  • Powered by two AAA batteries

Product Features

PIC16F1783 MCU Features

  • eXtreme Low Power (XLP) technology
  • mTouch® integrated capacitive touch sensing module
  • 11-channel 12-bit ADC
  • Integrated operational amplifiers
  • Several packages available including a small Ultra-Thin QFN (UQFN) package

RN42 Bluetooth Module Features

  • Fully certified Bluetooth 2.1 and EDR module offer rapid time to market for connected designs
  • On-board embedded Bluetooth stack (no host processor required)
  • Supports Bluetooth data link to iPhone/iPad/iPod Touch
  • UART local and over-the-air RF configuration
  • Secure communications, 128 bit encryption
  • Small form factor
  • Programmable low-power modes
  • Bluetooth SIG qualified

Additional Resources

  • Contact your local sales representative to see a working demonstration of the Connected Weight Scale Demonstration Board

    • Connected Weight Scale Video

    Microchip’s Connected Weight Scale Demonstration

    Microchip’s Connected Weight Scale Demonstration Board shows the implementation of a Bluetooth®-connected weight scale using Microchip’s PIC16F1783 MCU and the RN42 Bluetooth module. The PIC16F1783 MCU is an eXtreme Low Power (XLP), cost-effective 8-bit microcontroller with an integrated capacitive touch sensing module, 12-bit ADC and operational amplifiers. Connectivity is demonstrated on this board by the use of Microchip’s fully qualified RN42 Bluetooth 2.1 + EDR module. This demo design can also be easily implemented using any of Microchip’s Bluetooth Low Energy or Wi-Fi® connectivity modules. 

    https://www.microchip.com/en-us/solutions/medical