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Connected Thermometer Demonstration Board

PIC16F15XX MCU Family with Integrated Capacitive Touch Module and the RN42 Bluetooth® Module

connected thermo demo board


Thermometers have been around for some time in traditional medical settings, but now digital temperature measurement devices can be found in many new and exciting places. For example, the ability to measure temperature is now being integrated into many consumer products such as connected fitness and medical activity trackers.

Microchip's Connected Thermometer Board demonstrates the implementation of a Bluetooth-connected digital thermometer using Microchip's PIC16F1519 MCU and RN42 Bluetooth Module. The PIC16F1519 MCU is an eXtreme Low Power (XLP), cost-effective 8-bit microcontroller with an integrated capacitive touch sensing module.

Connectivity is demonstrated on this board by the use of Microchip's fully qualified RN42 Bluetooth2.1 + EDR Module. This demo design can also be easily implemented using any of Microchip's Bluetooth Low Energy or Wi-Fi® connectivity modules.

PIC16F1519 MCU Features

  • eXtreme Low Power (XLP) technology
  • mTouch® integrated capacitive touch sensing module
  • 28-channel 10-bit Analog-to-Digital Converter (ADC)
  • Fixed voltage reference with selectable voltage level outputs
  • Several packages available including a small Ultra-Thin QFN (UQFN) package

RN42 Bluetooth Module Features

  • Fully certified Bluetooth 2.1 + EDR module offers 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

Connected Thermometer Demonstration Board Highlights

  • Measures temperature in Fahrenheit or Celsius
  • Demo's buttons implemented using mTouch integrated capacitive touch technology
  • OLED display is used to demonstrate stand-alone design capability
  • Bluetooth module is used to demonstrate smartphone/tablet connected design capability
  • Low overall BOM cost due to function integration
  • Low-power operation utilizing Microchip's XLP PIC16F1519 MCU
  • Powered by two AAAA batteries

System Diagram

connected demo blk dgrm

Development Made Easy

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

This reference design helps to develop a low-cost digital thermometer which can be handheld or integrated into a wearable device.*

*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, and expenses resulting from such use.



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Contact your local sales representative to see a working demonstration of Microchip's Connected Thermometer Demonstration Board.