SparkFun SAMD21 Pro RF Hookup Guide
Elias The Sparkiest 
LoRaWAN Arduino Library and Example
The Internet of Things "Hello World" - Node Example
For this example, we'll be setting up the SAMD21 Pro RF as a node using a library written by Matthijs Kooijman which is a modified version of "IBM's LMIC (LoraMAC-in-C)" library. You can download it through the Arduino Library Manager under "LMIC-Arduino". There are a few versions of this library. The original Arduino library may be under "IBM LMIC framework by IBM". You can also download and manually install it from the GitHub Repository, or click the button below to manually install it from there.
This example requires that you have an account with The Things Network and a nearby gateway. Read the brief introduction above to learn about nodes, gateways, and network servers. First, we'll need an account at The Things Network which will provide us our network server to manage, graph, and/or look at our data in the case of our "Hello World" example below. On the front page of the website there's a map that shows active gateways in your area. If you don't have a gateway nearby, you can set one up using SparkFun's ESP32 1-Ch Gateway, using this excellent set up guide here. This is the gateway that I chose to use for this example.