Arduino code for simple Client and Server using Modtronix LoRa SX1278 inAir4 module http://wiki.modtronix.com/doku.php?id=projects:arduino-lora-server-client1
This code is based on following code: https://github.com/a3rd/lora-inair4/wiki/Setup-HOWTO
Which in turn was based on the Arduino code that HopeRF made to interface their LoRa module. It has been adapted and tested to work with the inAir4 LoRa module and an Arduino Nano.