HealthyPi v4 - Unplugged

by ProtoCentral

A wireless, wearable, open source vital signs monitor powered by ESP32

View all updates Oct 09, 2019

What Makes This a Wearable Platform?

by Ashwin K Whitchurch

HealthyPi v4 stands out from its predecessor, HealthyPi v3, because of one major additional feature: we made it a wearable development platform.

HealthyPi v4 in Wearable Mode

Why make HealthyPi v4 wearable? So that it can provide live, seamless, and stable vitals on the go. You can pair your smartphone with the device and stream live vital signs to the screen of your mobile. Below are some of the major features of HealthyPi 4 that make it suitable for wearable device development.

1. Bluetooth Low Energy (BLE)

HealthyPi v4 is powered by the ESP32 SoC module, which supports pairing with smartphones through BLE. BLE is widely used in wearable devices because its low power requirements allow it to function for a long time without charging. HealthyPi v4 also supports pairing with other IoT devices for use in mesh networks. BLE 4.2 adds improved security capabilities.

Data measured by Healthy Pi v4 is accessible through standard BLE services for Heart Rate, Pulse Oximeter, Health Thermometer and Battery Service, as well as custom services for ECG and respiration. Notifications are used to transmit data from HealthyPi to the app.

Service Name UUID
Heart Rate Service 0x180D
Pulse Oximetry Service 0x1822
Health Thermometer Service 0x1809
Battery Service 0x180F

BLE Services in HealthyPi v4

2. Battery powered

HealthyPi v4 can be used as a standalone device, without external interfaces or power. Powering the device with a LiPo rechargeable battery improves its portability.

HealthyPi v4 Battery

The provided 1000 mAH battery – which includes built-in overvoltage, overcurrent, and minimum voltage protections – should be sufficient for most use cases, but you can connect any 3.7 V LiPo battery directly to HealthyPi v4 through the onboard 2-pin JST-PH connector.

3. Introducing the HealthyPi app

Monitoring the human physiological data associated with day-to-day activities becomes much simpler with the HealthyPi app, which will be made available in app stores, for both Android and iOS devices, after the campaign ends. Its source code will be released at that time as well.

The HealthyPi app is used to communicate directly with HealthyPi v4 hardware, through the same BLE services mentioned above, and can display all vital signs on a single screen.

HealthyPi App

HealthyPi v4 is a powerful tool, and the HealthyPi app opens up new possibilities for using it to monitor vital signs outside of traditional settings. Among other features, it is capable of displaying respiration and ECG data. A simulation of the latter function is shown below:

HealthyPi v4 ECG Streaming

About the Author

Ashwin K Whitchurch


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$349

HealthyPi v4 Complete Kit (Early Bird!)

Everything in the HAT Kit, plus: a Raspberry Pi 3 Model B+ computer, a 16 GB microSD card with Raspbian and Healthy Pi software, a seven-inch Raspberry Pi touchscreen LCD display, and a SmartiPi Touch enclosure for both the display and the Pi. Includes an isolated, medical-grade USB wall power adapter with plugs for the following regions: US, EU and UK. ($50 off the full campaign price and $100 off the post-campaign retail price of $449.)


$199

HealthyPi v4 HAT Kit

A HealthyPi v4 and all of the accessories you will need to use it: a three-electrode ECG "snap connector" cable, a 1000 mAh LiPo battery, 20 single-use ECG electrodes, a finger-clip SpO₂ probe, a Qwiic-based temperature sensor, and a HAT mounting kit with headers and screws for stacking your HealthyPi v4 atop a Raspberry Pi. ($50 off the post-campaign retail price of $249.)


$399

HealthyPi v4 Complete Kit

Everything in the HAT Kit, plus: a Raspberry Pi 3 Model B+ computer, a 16 GB microSD card with Raspbian and Healthy Pi software, a seven-inch Raspberry Pi touchscreen LCD display, and a SmartiPi Touch enclosure for both the display and the Pi. Includes an isolated, medical-grade USB wall power adapter with plugs for the following regions: US, EU, UK, and AU. ($50 off the post-campaign retail price of $449.)


$169

HealthyPi v4 HAT Kit (Early Bird!)

A HealthyPi v4 and all of the accessories you will need to use it: a three-electrode ECG "snap connector" cable, a 1000 mAh LiPo battery, 20 single-use ECG electrodes, a finger-clip SpO₂ probe, a Qwiic-based temperature sensor, and a HAT mounting kit with headers and screws for stacking your HealthyPi v4 atop a Raspberry Pi. ($30 off the regular campaign price and $80 off the post-campaign retail price of $249.)

Credits

ProtoCentral


Ashwin K Whitchurch

Manikandan S

Joice TM

Biswajit Ojha

Archana V

Manigandan B

Mohammed Ibrahim

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