# RTOS and bare metal options for SAMD21

[Zephyr](https://www.zephyrproject.org/] 

[Zephyr on Feather](https://learn.adafruit.com/blinking-led-with-zephyr-rtos)

https://github.com/ataradov/mcu-starter-projects

# Referenes on SAMD21 and Feather ecosystem


[Zephy / Boards / feather m0](https://docs.zephyrproject.org/latest/boards/arm/adafruit_feather_m0_basic_proto/doc/index.html)
 - documents the port assignments on the SAMD21 and interconnect on Feather


# LoRa, LoRaWAN, and Feather

https://github.com/svcguy/lorawanFeather

https://github.com/kisom/lora-modem 

https://github.com/MKme/lora 

https://github.com/cbleg98/LoRa-High-Altitude-Balloon 

https://learn.adafruit.com/adafruit-feather-m0-radio-with-lora-radio-module/using-the-rfm-9x-radio