I have attached my current sample code to send and receive. It makes use of the Arduino LoRa Library by Sandeep Mistry and displays RSSI and SNR of the received data.
The latest version (v1.80) of RadioHead RF95 Library also works now without additional tweaks! Prior versions failed to compile (missing atomic.h).
Since these modules don't have a tcxo, there is a slight frequency mismatch. RadioHeads 'frequencyError()' tells me, the relative offset between my modules to be roughly approx. 1.5kHz.
There's a nice case created by Aleksei Golikov / lexgol for the heltec Wifi LoRa 32 board: https://makerware.thingiverse.com/thing:2581459
Just download the files and have it printed yourself.