Setup:

Install SAMD boards in Arduino IDE
Install Arduino Low Power
Install TemperatureZero
Install libraries from MultiNode/Libraries
Upload MultiNode/MultiNode.ino
Execute MultiNode/Configurator.py while it is attached

RasPi:

# Install https://www.airspayce.com/mikem/bcm2835/ on Raspberry Pi (maybe not)
sudo apt-get install pip
pip install numpy pyLoraRFM9x pyblake2 toml

C++ programs need to be executed with sudo, or set permissions to use bcm2835 as user

Execute RasPi/RXTest.py

Reconfiguring a node:

Attach it via USB
Press the reset button (left of USB connector)
It will not enter sleep until it is unplugged