Not sure if you've already seen this but just in case: there is an easy way to get siri and your moteino+pi gateway working:
https://github.com/nfarina/homebridgeI have it installed on my bananapi that talks serial to my moteino which in turn talks to my weather station (with another moteino) and it's pretty neat - true this could interface with other things than moteino but if you're already using the Felix Pi's gateway you'll get a new level of interaction.
As an fyi I went the easy way and used the Lockitron sample code, registered a temperatureService and humidityService which call a REST entry point on one of my servers, I have socket.io on the banana so technically I could just open a socket directly to the PI but since the PI already requests data every minute from the weather station it seems fine...
I used the apple sample code HMCatalog to debug from my iPhone the commands to use for Siri but as explained on the github you can use other apps...
I thought this was very neat so just posting here as an fyi, enjoy!
X