Module Request: LoRaMac-Node

[Mani-Sadhasivam]

This RFC issue is targeted towards adding Semtech's LoRaMac repo as a module to zephyr. The repository is available here: https://github.com/Lora-net/LoRaMac-node

As per Wikipedia,
"LoRa (Long Range) is a spread spectrum modulation technique derived from chirp spread spectrum (CSS) technology and is the first low-cost implementation of chirp spread spectrum for commercial usage. It was developed by Cycleo of Grenoble, France, and acquired by Semtech in 2012, a founding member of the LoRa Alliance. LoRa uses license-free sub-gigahertz radio frequency bands like 433 MHz, 868 MHz (Europe) and 915 MHz (North America). LoRa enables long-range transmissions (more than 10 km in rural areas) with low power consumption. The technology is presented in two parts: LoRa, the physical layer and LoRaWAN (Long Range Wide Area Network), the upper layers."

For Zephyr, both LoRa (Point to Point without WAN) and LoRaWAN wireless technologies can be used to support Industrial applications.

As discussed in #17685, we agreed to depend on Semtech's LoRaMac repository for the LoRaWAN stack as well as the Radio drivers in order to avoid code duplication and less maintenance. LoRaMac-Node repository is the reference implementation of the endpoint LoRaWAN stack implementation which perfectly suits to create endpoint nodes powered by Zephyr. This repository is available under Revised BSD License and should not be an issue to depend as a module.

Feature request: #5436

Preferred repository/module name: loramac_node

[Mani-Sadhasivam]

@carlescufi @alexanderwachter @tbursztyka @jukkar

[carlescufi]

Repo is created:

https://github.com/zephyrproject-rtos/loramac-node

I think we can close this issue, all we need now is for @Mani-Sadhasivam to send a PR adding the west.yml entry.