Right now I think the only one supported is http://www.espruino.com/RN2483 (which is Serial) - but if there's a module that implemented LoRaWAN (not just LoRa) it should be pretty easy to support.
To support LoRaWAN on basic radio modules like SX1276 we'd have to build the LoRaWan stack into Espruino (unless someone wants to make a JS implementation!). It's not impossible but due to space constraints it's not something I think I'd be able to add to the existing firmware, so it'd have to be a new firmware file that you flashed instead
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Which SPI LoRaWAN did you have in mind?
Right now I think the only one supported is http://www.espruino.com/RN2483 (which is Serial) - but if there's a module that implemented LoRaWAN (not just LoRa) it should be pretty easy to support.
To support LoRaWAN on basic radio modules like SX1276 we'd have to build the LoRaWan stack into Espruino (unless someone wants to make a JS implementation!). It's not impossible but due to space constraints it's not something I think I'd be able to add to the existing firmware, so it'd have to be a new firmware file that you flashed instead