We recently tried out the HealthyPi 3 with a Raspberry Pi 3 and a power source to create a truly wireless patient monitor. This can send the data continuously as a TCP stream for real-time monitoring or just post only the calculated values to a remote or IoT platform.

We even tried it out with a Raspberry Pi Zero to make a really small unit for wireless monitoring. Check out out crowd supply update where we have posted all the details:

https://www.crowdsupply.com/protocentral/healthypi-v3/updates/healthypi-v3-with-raspberry-pi-3-pi-zero-as-a-wireless-standalone-monitor

We will also add this code to our Github repo as soon as we get a chance to clean up the code.