IoT Development Tools Resources

I want to implement bigger devices but I'm a little lost with which are the best to use

I have multiples Argon MCU and i would like them to interact exchanging information even when is no wifi present.

Seems like a big opportunity for a company like Particle to accommodate LoRa and/or even LoRaWAN. For example, have a remote Particle Boron be able to act as a pseudo gateway for a LoRaWAN sensors (or even LoRa nodes). In remote regions, with only a few nodes, the challenge is a low power, cellular connected, low cost gateway. Particle does this fantastic for stand alone devices but many times these applications still require remote nodes. Marrying the ability up witll only accelerate Particle in the IoT space.