Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes

Connected Wearable Electrocardiogram (ECG) Demo

mpg photo medical ecg board angle transparent


Electrocardiogram (ECG) heart data is a more complex measurement than a simple heart rate measurement expressed in beats per minute (BPM). ECG measurement and analysis are becoming popular functions for fitness applications, but they are also essential parts of many medical device designs. As medical remote patient monitoring becomes more important, the need for wearable ECG capability has become critical. Microchip’s Connected, Wearable ECG Demonstration Board can be used in the design of advanced fitness tracking devices and can also be designed into medical wearable remote patient monitoring and diagnostic systems.

This demo features the SAML22—a high-performance, 32-bit ARM Cortex-M0+ microcontroller with ultra low-power technology, the BTLC1000 Bluetooth® Low Energy (BLE) 4.1 Module, the ECC508A CryptoAuthentication chip and the NeuroSky® CardioChip ECG Biosensor.

The ECG demo measures complex heart rate and computes other heart related data. Patient movement is also tracked via an on-board accelerometer. The BTLC1000 BLE module on this board allows the demo to communicate with tablets, smartphones or PCs for IoT capability.

Design Files Download

Connected Wearable ECG Demo ‘C’ Source Code and User Guide with Schematics are available for this demo


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

Demonstration Highlights

  • Ideal for portable/wearable medical/fitness designs
  • Measures heart rate and computes heart rate variability, heart age and stress using ECG data
  • Easy development of more advanced heart-health index functions
  • Demo can also be shown using standard ECG leads
  • BLE module is used for smartphone/tablet IoT capability
  • Low overall BOM cost due to high level of integration
  • Powered from a single AAA battery

Related Product Pages

  • SAM L22 Arm® Cortex® M0+ based microcontroller
  • BTLC1000 ultra-low power Bluetooth Low Energy module (not recommended for new designs) RN4871 or RN4870 Bluetooth Low Energy modules are recommended for new designs
  • ATECC508A CryptoAuthentication™ secure element (not recommended for new designs) ATECC608A CryptoAuthentication secure element is recommended for new designs
  • NeuroSky CardioChip ECG Biosensor
  • SST26VF064B 64 Mb 2.3-3.6V Serial Quad I/O (SQI) Flash
  • MIC5365 high-performance single 150 mA LDA
  • MIC94062 high-side load switch 2A, 77 mΩ
  • MCP16252 low quiescent current synchronous boost regulator

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

SAML22 MCU Features

  • ARM® Cortex®-M0+ based MCU running up to 32MHz
  • Up to 256KB embedded Flash and 32KB SRAM
  • Low power consumption at <39µA/MHz
  • Segment LCD (SLCD) Controller with up to 320 segments
  • DMA, Sleepwalking and Event system
  • Up to 6 flexible serial communication modules (SERCOM)
  • Up to 5 timers/counters
  • Full-Speed USB Device
  • 12-bit ADC (SAM L22N: 20 channels; SAM L22J: 16 channels; SAM L22G: 10 channels)
  • 2 analog comparators and programmable logic block
  • PTC Hardware touch support
  • Tamper detection
  • QFP, QFN and WLCSP package options (SAM L22N: 100 pins; SAM L22J: 64 pins; SAM L22: 48 pins)
Buy the SAML22 MCU Now

RN4871 Bluetooth Low Energy Module Features

  • Bluetooth 5 certified
  • Easy-to-use ASCII command interface for communication with the host microcontroller
  • Module certified for use in USA, Canada, Brazil, Europe, Japan, Korea, Taiwan and China
  • Mobile application supported in Microchip Bluetooth Data (MBD)
  • Remote configuration capability
  • Ceramic chip antenna or external antenna connection
Buy the RN4871 Bluetooth Low Energy Module Now

ATECC608A CryptoAuthentication Secure Element Features

  • Cryptographic co-processor with secure hardware-based key storage
  • Protected storage for up to 16 keys, certificates or data
  • FIPS SP800-56A Elliptic Curve Diffie-Hellman (ECDH)
  • NIST standard P256 elliptic curve support
  • SHA-256 and HMAC hash including off-chip context save/restore
  • AES-128 encryption/decryption, Galois Field Multiply for GCM
Buy the ATECC608A CryptoAuthentication Secure Element Now

NeuroSky CardioChip ECG Biosensor

  • Single-chip solution for accurate bio-signal detection and processing
  • Ultra small footprint 3 mm x 3 mm package and extremely low power consumption
  • Mixed-signal SoC with integrated Analog Front End (AFE), DSP functions and choice of serial interface UART/I2C/SPI
  • Accurate ECG raw signal as well as real-time heart-rate output
  • Supports signal acquisition using dry contact electrodes
  • High-performance AFE for detection and processing of bio-signals ranging from μV to mV levels
  • Advanced Low-Noise Amplifier (LNA) and anti-alias filtering
  • High-resolution (16-bit) ADC with 512 Bytes/sec sample rate
  • Accurate on-chip heartbeat detection (24–200 bpm) and real time heart rate (± 1 bpm) computation
  • For pricing and availability contact Neurosky at sales@neurosky.com or for more information go to http://neurosky.com/biosensors/ecg-sensor/

This reference demo helps designers develop a portable/ wearable, connected ECG board design with Bluetooth Low Energy capability for medical and fitness IoT applications.*

System Diagram

Medical ECG Demo Board

Development Made Easy

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

*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.

Medical Video Channel