Portable battery-powered health monitor
This example features the HealthyPi Vital Sign Monitoring Kit V3 by protocentral.com V4 can now be pre-ordered at https://www.crowdsupply.com/protocentral/healthypi-v4-unplugged V4 has enhancements that will simplify connection to the tablet. This post will be updated early 2020 once the V4 kit arrives.
Hardware shown
Tablet Frame Kit for Raspberry Pi and Arduino, Model AZ8, by Novel Design Lab
Amazon Fire 8" tablet (2019)
Raspberry Pi 3 Model B
Healthy Pi Vital Sign Monitoring Kit V3 by protocentral.com
Power supply for R-Pi: lithium battery expansion board RPI power pack v1.2 with USB cable (v2.x not compatible)
3-Ring Mini Binder
Miscellaneous items: microSD card
Software
The HealthyPi Vital Sign Monitoring Kit V3 requires manual installation of WiFi access point on the Raspberry Pi and VNC client on the tablet for connection. V4 kit will have a WiFi access point implemented and web app for operating the HealthyPi hardware via the tablet.
Installed on Raspberry Pi (HealthyPi kit V3):
Raspbian 2018-03-30. More recent versions had software conflict in this set-up.
WiFi access point installed (per Raspberry Pi Foundation instructions): https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md
Some settings: enable VNC server (Raspberry Pi Preferences); enable VNC password (VNC Server options); set screen size to best-fit tablet (Raspberry Pi preferences)
HealthyPi software installation: http://healthypi.protocentral.com
Installed on tablet:
Option 1: Remote Desktop Manager (Amazon Appstore)
Option 2: install Google Play store: https://www.laptopmag.com/articles/get-google-play-on-fire-tablet then install RealVNC Viewer (Google Play Store)