Very interesting news indeed! I like the Grove LoRa, perfect for bringing radio to any project.
What do you mean by “Arduino is not supported by LoRa-E5”? Since the MCU is a Cortex-M4, porting Arduino should be doable. The real challenge would be the library for LoRa, albeit encapsulating a C library into a C++ class is the standard procedure.
As always, should you need beta-testers, I’m ready to try! Happy New Chinese Year!