This page contains some links to source code and projects for programming the Modtronix inAir4, inAir9 and inAir9B LoRa modules with Semtech SX1276 and SX1278 chips.
There are a lot of example projects and libraries available on mbed.org. There are also some official libraries published by Semtech. The following seems to be some of the best libraries:
The SX1276Lib Library has a lot of functionality, but is quite complex. It requires the target CPU to configure all I/O ports connected to the DIOx pins of the SX1276/8 chip as interrupts.
The SX127x Library seems to be a simplified version of the “SX1276Lib Library” listed above. It does not use interrupts on the target CPU, and in stead polls the SX1276/8 chip for interrupts on it's DIOx pins.
The following project use the libraries listed above: